Are you a "morning person" or a "night owl?"

Scientists at the University of Alberta have found that there are significant differences in the way our brains function depending on whether we're early risers or night owls. Neuroscientists in the Faculty of Physical Education and Recreation looked at two groups of people: those who wake up early and feel most productive in the morning, and those who were identified as evening people, those who typically felt livelier at night. Study participants were initially grouped after completing a standardized questionnaire about their habits.

Using magnetic resonance imaging-guided brain stimulation, scientists tested muscle torque and the excitability of pathways through the spinal cord and brain. They found that morning people's brains were most excitable at 9 a.m. This slowly decreased through the day. It was the polar opposite for evening people, whose brains were most excitable at 9 p.m.

Other major findings:
    * Evening people became physically stronger throughout the day, but the maximum amount of force morning people could produce remained the same.
    * The excitability of reflex pathways that travel through the spinal cord increased over the day for both groups.

These findings show that nervous-system functions are different and have implications for maximizing human performance.

Early childhood development researchers have discovered that a simple, five-minute self-regulation game not only can predict end-of-year achievement in math, literacy and vocabulary, but also was associated with the equivalent of several months of additional learning in kindergarten.

Claire Ponitz from the University of Virginia and Megan McClelland of Oregon State University assessed the effectiveness of a game called the Head-Toes-Knees-Shoulders (HTKS) task, which is a new version of the Head-to-Toes task developed by researchers at the University of Michigan. Both tasks have proved effective at predicting academic skills among preschool age children. Their results were published in the newest issue of the journal, Developmental Psychology.

The researchers assessed a group of 343 kindergarteners from Oregon and Michigan. Their self-regulation, or ability to control behavior, was measured with the Head-Toes-Knees-Shoulders task, a structured observation requiring children to perform the opposite of a response to four different oral commands. For example, children were instructed to touch their toes if told to touch their head, and vice versa. They found that students who performed well on his behavior task in the fall achieved strong scores in reading, vocabulary and math in the spring, compared to students who had low performance on the task. In addition, the research showed that the children who performed well on the task scored 3.4 months ahead of peers who performed at average levels on mathematics learning. "It's amazing that this game works as well as it does," McClelland said. "It is simple to administer, fun for the kids, and predicts children's academic achievement."

One area where the task did not make a difference was assessing children's interpersonal skills. McClelland explained that the game is not "emotion-oriented," meaning it is not set up to trigger an emotional response. Instead, the Head-Toes-Knees-Shoulders task tests children on important classroom-related behavior such as listening, following directions and remembering instructions. "We know this task predicts end-of-year achievement," she said. "Now we want to take the game to the next level."

McClelland is planning to do an extensive evaluation of the task for her next research project, testing the task with an even larger group of children. She also has a number of research projects under way with OSU graduate students, including one that uses a variety of fun games to improve a child's ability to regulate their behavior. She said she has made a simple DVD that demonstrates the task, and in response has received requests from around the world from researchers who want to use the task with young children. "The evidence strongly suggests that improving self-regulation is directly related to academic achievement and behavior," McClelland said. "If we can make a difference early in a child's life, they have that much more of a chance at success."

A flurry of recent research has documented that talking on a cell phone poses a dangerous distraction for drivers and others whose attention should be focused elsewhere. Now, a new study in the Journal of Environmental Psychology finds that just the ring of a cell phone may be equally distracting, especially when it comes in a classroom setting or includes a familiar song as a ringtone. "In any setting where people are trying to acquire knowledge and trying to retain that information in some way, a distraction that may just seem like a common annoyance to people may have a really disruptive effect on their later retention of that information," said the study's lead author, Jill Shelton, a postdoctoral psychology fellow in Arts & Sciences at Washington University in St. Louis.

The study includes an experiment in which Shelton poses as a student seated in the middle of a crowded undergraduate psychology lecture and allows a cell phone in her handbag to continue ringing loudly for about 30 seconds. Students tested later scored about 25 percent worse for recall of course content presented during the distraction, even though the same information was covered by the professor just prior to the phone ring and projected as text in a slide show shown throughout the distraction. Students scored even worse when Shelton added to the disturbance by frantically searching her handbag as if attempting to find and silence her ringing phone. "Many of us consider a cell phone ringing in a public place to be an annoying disruption, but this study confirms that these nuisance noises also have real-life impacts," Shelton said. "These seemingly innocuous events are not only a distraction, but they have a real influence on learning."

Titled "The distracting effects of a ringing cell phone: An investigation of the laboratory and the classroom setting," the study was conducted at Louisiana State University, where Shelton received her doctoral degree. Her co-authors in the LSU psychology department include Emily Elliott, Sharon Eaves and Amanda Exner. The study explores cognitive differences in how we respond to auditory distractions, specifically whether we process these interruptions using a voluntary, top-down, executive-level shift in attention or as a more reflexive, automatic and involuntary reorientation of attention. Perhaps most surprising, the study found that unexpected exposure to snippets of a popular song, such as those often used as ringtones, can have an even-longer-lasting negative impact on attention.

In this phase of the experiment, students in a laboratory were tested on simple word-recognition tasks while exposed to a range of auditory distractions, including irrelevant tones, standard cell phone rings and parts of a song very familiar to most LSU students. The song, an instrumental version of the LSU fight song, was then being played incessantly around campus as LSU football made its fall 2007 run to the national college championship. The song also became a popular cell phone ringtone.

"When we played the fight song as part of our lab experiments, the distraction factor lasted longer," Shelton said. "It slowed down their decision-making performance for a longer time than even a standard ringtone." Thus, people who use popular songs as a personal ringtone may be increasing the odds their cell phone rings will be more distracting. "Depending on how familiar people are with these songs, it could lead to an even worse impairment in their cognitive performance," she said.

The study raises concerns for people who attempt to concentrate while being bombarded by beeps and buzzes from incoming email or text messages. Findings suggest the potential for distraction is greater if the ring tone has some special meaning or personal relevance, such as a custom tone that identifies a call as coming from a parent, close friend or boss at work. On the bright side, students in repeated trials of the experiment eventually were able to block the distracting effects of both standard and song-based cell phone rings, gradually reducing cognitive impairment caused by them. "There's definitely some evidence to suggest that people can become habituated to a distracting noise," Shelton said. "If you're in an office where the phones are just ringing all the time everyday, it may initially be distracting to you, but you will probably get over it." While these findings have plenty of real world implications, they also shed light on whether a voluntary or involuntary model best describes cognitive lapses caused by nuisance noises.

Recent research has shown that talking on a cell phone while driving results in serious consequences, such as slower braking responses and increased risks of running red lights and collisions — effects attributed to phone conversation absorbing important voluntary attentional resources needed to respond to information in the driving field. The unexpected ringing of a phone, on the other hand, might be explained using the involuntary model, one that views our response as a more automatic, almost reflexive re-orienting of attentional resources, and a process over which we have little control. Shelton suggests that our response to a ringing cell phone may involve a combination of these cognitive responses depending on the situation and whether the ring is unexpected. In one of her lab experiments, she found that participants who were warned about the potential for distraction were able to recover more quickly and moderate their levels of cognitive impairment. "Our experiments suggest that there is a benefit to prior knowledge in how we respond to nuisance noises," Shelton said. "It doesn't mean you won't experience a disruption to what you were doing for that brief period, but your cognitive system can adjust and get back on task fairly quickly."

Children entering first grade with signs of depression and anxiety or excessive aggression are at risk of being chronically victimized by their classmates by third grade. That's the finding of a new longitudinal study that appears in the May/June 2009 issue of the journal Child Development.

The study, conducted by researchers at the University of Victoria, looked at more than 400 Canadian children beginning in the autumn of first grade. The children were asked about their experiences being bullied (such as being hit, pushed, and shoved, or being teased and excluded from play). Their teachers were asked to report on the children's symptoms of depression and anxiety, as well as on their displays of physical aggression. The researchers returned at the end of first, second, and third grades, at which time they asked the children and their teachers to report on the same issues.

Most children (73 percent) showed few symptoms of depression and anxiety over the three years. But 7 percent of the children showed continuously high levels. The remaining 20 percent showed moderate symptoms at first, but these increased over time. Victimization by depressed and anxious children wasn't evident until third grade.

Children with more depressed and anxious symptoms in first and second grade were more likely to be victimized by third grade. Surprisingly, children who were more aggressive at the start of first grade also were prone to depression and anxiety by third grade. These children also were more likely to be victimized by their peers, perhaps in retaliation for their own acts of aggression.

"Children's early mental health problems can set the stage for abuse by their peers," according to Bonnie J. Leadbeater, professor of psychology at the University of Victoria, who led the study. "Just as some children learn to read with greater difficulty than others and require extra assistance when they begin to lag behind their peers, young children with mental health problems show signs that they cannot manage the complex social world of elementary school. Treating children's mental health problems may go a long way toward reducing bullying."

"[...] the common strategies include dismissing as "junk science" peer-reviewed studies showing a link between their products and disease; paying scientists to produce pro-industry studies; sowing doubt in the public's mind about the harm caused by their products; intensive marketing to children and adolescents; frequently rolling out supposedly "safer" products and vowing to regulate their own industries; denying the addictive nature of their products; and lobbying with massive resources to thwart regulatory action."

Big Food Is Copying Big Tobacco's Disinformation Tactics, How Many Will Die This Time?
By Fen Montaigne
Posted 11 April 2009 on AlterNet

Behavior treatment works as well as drugs for children with ADHD and bypasses the risk of medication's side effects, a meta-analysis of 174 studies on ADHD treatment conducted at the University at Buffalo, has shown. The results, published in the March issue of Clinical Psychology Review, found that teaching parents and teachers how to respond when children do things the right way -- as well as when they display harmful or aggressive behavior -- is effective, and in some cases more effective, than medication for ADHD.

"This review shows that behavioral treatments work, and in general work well," said Gregory A. Fabiano, Ph.D., assistant professor in the Department of Counseling, School and Educational Psychology in UB's Graduate School of Education, and first author on the paper. "For the past couple of decades, there has been considerable professional controversy about the role and adequacy of behavior modification treatments in the care of children with ADHD. The next step is to figure out how to make them work for individual families over the long run, because we now know that ADHD is a lifelong condition."

Through use of behavior modification, children could bypass the risk of side effects from ADHD drugs and achieve the same or better results as drug treatments, Fabiano noted. William Pelham, Jr., Ph.D., UB Distinguished Professor of Psychology, Pediatrics and Psychiatry, is co-author on the study.

Fabiano noted that ADHD is one of the most common mental health disorders among children. "Prevalence rates place at least one child with ADHD in every classroom in America, highlighting the need for effective interventions. "Our results suggest that efforts should be redirected from debating the effectiveness of behavioral interventions to dissemination, enhancing and improving the use of these programs in community, school and mental health settings." In the future, Fabiano plans to work with teachers, parents, pediatricians and clinicians in the community to emphasize the effectiveness of behavior modification treatments.

His additional research includes developing strategies to get fathers more involved in the treatment of children with ADHD, and use of driving simulators to help teens with ADHD learn to drive, while also helping parents learn to provide effective driving instruction to their teens.

Fabiano is a recent recipient of the White House's Presidential Early Career Award for Scientists and Engineers, the nation's highest honor for professionals at the early stages of their independent scientific research careers.

Older adults with generalized anxiety disorder who received cognitive behavior therapy had greater improvement on measures of worry, depression and mental health than patients who received usual care, according to a study in the April 8 issue of JAMA.

Generalized anxiety disorder is common in late life, with prevalence up to 7.3 percent in the community and 11.2 percent in primary care. Late-life anxiety predicts increased physical disability, memory difficulties and decreased quality of life, according to background information in the article. Late-life anxiety is usually treated with medication, but associated risks (e.g., falls, hip fractures, memory problems) with some drugs and patient fears of adverse effects limit their usefulness. Two previous studies suggested benefits of cognitive behavior therapy in primary care for late-life GAD, but the studies were small and conclusions were limited. Older adults most often seek treatment for GAD in primary care.

Melinda A. Stanley, Ph.D., of Baylor College of Medicine, Houston, and colleagues conducted the first randomized clinical trial of CBT for late-life GAD in primary care to examine whether CBT would improve outcomes relative to enhanced usual care. The trial included 134 older adults (average age, 67 years) in two primary care settings, with treatment provided for 3 months. Assessments were conducted at the beginning of the trial, posttreatment (3 months), and over 12 months of follow-up, with assessments at 6, 9, 12 and 15 months. Patients were randomized to either CBT (n = 70), which included education and awareness, relaxation training, cognitive therapy, problem-solving skills training and behavioral sleep management; or EUC (n = 64), in which patients were telephoned biweekly during the first 3 months of the study by the same therapists to provide support and ensure patient safety. Therapists reminded patients to call project staff if symptoms worsened.

Levels of anxiety, worry, depression and physical/mental health quality of life were measured via various tests or surveys. The researchers found that CBT, compared with EUC, significantly improved worry severity, depressive symptoms and general mental health. In intention-to-treat analyses, response rates defined according to worry severity were higher following CBT compared with EUC at 3 months (40.0 percent vs. 21.9 percent).

"This study is the first to suggest that CBT can be useful for managing worry and associated symptoms among older patients in primary care," the authors write. "This study paves the way for future research to test sustainable models of care in more demographically heterogeneous groups."

Pharmed Fish
A study presented at an American Chemical Society meeting reveals that fish from sites in various parts of the country tested positive for drugs and personal care product chemicals that wind up in the water supply.

60-Second Science from Scientific American podcasts
26 March 2009

Women experiencing physical abuse from intimate partners spent 42 percent more on health care per year than non-abused women, according to a long-term study of more than 3,000 women. And the costs don't end when the abuse does. The study revealed that women who suffered physical abuse five or more years earlier still spent 19 percent more per year on health care than women who were never abused. "Along with all the physical and emotional pain it causes, domestic violence also comes with a substantial financial price," said Amy Bonomi, co-author of the study and associate professor of human development and family science at Ohio State University.

The study is the largest to date to examine health care costs and utilization based on the timing and type of domestic violence that women suffer, Bonomi said. The study, co-authored with researchers from the Group Health Cooperative and the University of Washington in Seattle, was published online this week in the journal Health Services Research. It will appear in an upcoming print edition.

The research examined data from 3,333 randomly selected women who belonged to Group Health, a health care system in the Pacific Northwest. Women in the study were surveyed about whether they experienced any physical or emotional abuse from intimate partners and if so, when it occurred. Researchers then studied patterns of health care use and costs by the women over an 11-year period, from 1992 through 2002.

"We were able to track health care costs for quite a long time, giving us a good picture of how much domestic violence is actually costing our health care system," Bonomi said. Women experiencing ongoing physical abuse had the highest health care costs -- 42 percent higher than non-abused women. "It's likely that these women need more health care because they are seeking care for immediate injuries and associated health problems," Bonomi said. Women who had been physically abused within the last five years, but not currently, had 24 percent higher yearly health costs. Abuse that occurred more than five years ago resulted in 19 percent higher costs.

The study separately examined women who experienced psychological abuse, which included verbal threats and chronic controlling behavior. Those suffering psychological abuse within the past five years, but not currently, had yearly health care costs that were 33 percent higher than those of non-abused women. "It's possible that it takes additional time for women with psychological abuse to seek care for their experiences," Bonomi said.

Another striking finding was that all abused women, whether they experienced physical or psychological abuse, used significantly more mental health services than non-abused women, Bonomi said. Women suffering ongoing physical abuse were about 2.5 times more likely to visit a mental health provider in the past year than were non-abused women. The rate for psychologically abused women was two times higher. "This lends support to the idea that mental health providers should always ask women about their abuse history when they first come in for treatment," Bonomi said.

But mental health was just one of several areas in which abused women used more services. Physically abused women used significantly more primary care, pharmacy, specialty care, laboratory and radiology services. For psychologically abused women, more services were needed in specialty care, pharmacy, and radiology.

Group Health, the health care system whose members were surveyed for the study, provides health and insurance services to more than 500,000 people in the Pacific Northwest.

A Brown University-led research team has documented for the first time how bats land. The results are surprising: Not all bats land the same way. The findings, which appear in the Journal of Experimental Biology, could offer new insights into how the second-largest order of mammals evolved.

PROVIDENCE, R.I. [Brown University] — People have always been fascinated by bats, but the scope of that interest generally is limited to how bats fly and their bizarre habit of sleeping upside down. Until now, no one had studied how bats arrive at their daytime perches.

A Brown University-led research team is the first to document the landing approaches of three species of bats — two that live in caves and one that roosts in trees. What they found was surprising: Not all bats land the same way.

“Hanging upside down is what bats do,” said Daniel Riskin, a postdoctoral researcher in the Ecology and Evolutionary Biology department at Brown and lead author on a paper published in the Journal of Experimental Biology. “We've known this. But this is the first time anyone has measured how they land.”

Using sophisticated motion capture cameras in a special flight enclosure, the team filmed each species of bat as it swooped toward a latticed landing pad and landed on it. Cynopterus brachyotis, a tree-roosting bat common in tropical parts of southeast Asia, executed a half-backflip as it swooped upward to the landing site, landing as its hind legs and thumbs touched the pad simultaneously — a four-point landing, the group observed. The landing is hard, Riskin noted, with an impact force more than four times the species’ body weight.

The team then turned its attention to two cave-roosting species, Carollia perspicillata and Glossophaga soricina. These bats, common in Central and South America, approach their landing target with a vertical pitch and then, at the last instant, yaw to the left or to the right — executing a cartwheel of sorts — before grasping the landing pad with just their hind legs. The two-point landing is much gentler than the impact force exerted by the tree-roosting bats, the researchers observed; the cave-roosting bats have a landing impact force of just one-third of their body weight.

There are about 1,200 recognized bat species worldwide, so Riskin was cautious about not drawing any grand conclusions. Still, he said, the fact that the team has documented that bats land differently could open new insights into a species that makes up roughly one-fifth of all mammals on earth. “It's opening the door to how bats evolved,” Riskin said. “You can say that bats have been hanging upside down since they first evolved, and it has probably been one of the keys to their worldwide success.”

Other Brown researchers who worked on the paper include Sharon Swartz, associate professor of biology; Tatjana Hubel, a postdoctoral researcher; and Joseph Bahlman, a graduate student. John Ratcliffe, a biologist at the University of Southern Denmark, and Thomas Kunz, a biologist at Boston University, contributed to the paper.

Native African people who have never even listened to the radio before can nonetheless pick up on happy, sad, and fearful emotions in Western music, according to a new report published online on March 19th in Current Biology, a Cell Press publication. The result shows that the expression of those three basic emotions in music can be universally recognized, the researchers said.

"These findings could explain why Western music has been so successful in global music distribution, even in music cultures that do not as strongly emphasize the role of emotional expression in their music," said Thomas Fritz of the Max-Planck-Institute for Human Cognitive and Brain Sciences.

The expression of emotions is a basic feature of Western music, and the capacity of music to convey emotional expressions is often regarded as a prerequisite to its appreciation in Western cultures, the researchers explained. In other musical traditions, however, music is often appreciated for other qualities, such as group coordination in rituals.

In the new study, Fritz, Stefan Koelsch, and their colleagues wanted to find out whether the emotional aspects of Western music could be appreciated by people who had no prior exposure to it. Previous studies had asked similar questions about people with little experience with a particular musical form, for instance Westerners listening to Hindustani music, they said. But to really get at musical universals requires participants who are completely naïve to Western music.

Fritz enlisted members of the Mafa, one of about 250 ethnic groups in Cameroon. He traveled to the extreme north of the Mandara mountain ranges, where they live, with a laptop and sun collector to supply electricity in his backpack.

Their studies showed that both Western and Mafa listeners, who had never before heard Western music, could recognize emotional expressions of happiness, sadness, and fear in the music more often than would be expected by chance. However, they report that the Mafa showed considerable variability in their performance, with two of twenty-one study participants performing at chance level.

Both groups relied on similar characteristics of music to make those calls; both Mafas and Westerners relied on temporal cues and on mode for their judgment of emotional expressions, although this pattern was more marked in Western listeners.

By manipulating music, the researchers also found that both Western listeners and African listeners find original music more pleasant than altered versions. That preference is probably explained in part by the increased sensory dissonance of the manipulated tunes.

"In conclusion," the researchers wrote, "both Mafa and Western listeners showed an ability to recognize the three basic emotional expressions tested in this study from Western music above chance level. This indicates that these emotional expressions conveyed by the Western musical excerpts can be universally recognized, similar to the largely universal recognition of human emotional facial expression and emotional prosody." Prosody refers to the rhythm, stress, and intonation of connected speech.

The Boston Center for Refugee Health and Human Rights (BCRHHR) at Boston Medical Center recently treated many of the large number of Tibetan refugee monks who fled violent religious persecution. These individuals arrived in Boston suffering from symptoms of traumatic stress, interfering with their meditative practice. The monks were diagnosed by their traditional healers as having srog-rLung, a life-wind imbalance. Recognizing that barriers exist between western and eastern medicine, the BCRHHR researched and implemented its own complementary therapy options to heal them. These findings appear online in the March issue of Mental Health, Religion and Culture.

According to Tibetan medicine, a srog-rLung disturbance has the potential to develop into a serious mental illness, leaving the victim at odds with the balance of the universe as well as jeopardizing his personal health. Symptoms of srog-rLung include uncontrollable crying, worrying, excessive mental, physical or verbal activity and an unhappy mind. Other conditions affecting the monk’s health include anxiety, depression and post traumatic stress disorder (PTSD).

Research in cross-cultural health settings, particularly refugee health services, shows that successful treatment is contingent on a combination of the patient’s interpretation of the illness and biomedical categories. This allows the patient to actively participate in his or her own healing. Cross-cultural psychiatric assessment is also necessary in determining appropriate treatment options, as treatment can be detrimental if not harmonized with the religious context in which mental illness will develop for these monks. The BCRHHR used traditional healers to obtain a dual diagnosis for the development of holistic therapy that responds to both PTSD and srog-rLung.

“This research and treatment involving patients accustomed only to traditional medicine, presented an opportunity for the acceptance of non-traditional therapeutic approaches,” explains Michael Grodin, MD, professor of health law, bioethics and human rights at Boston University School of Public Health, and professor of psychiatry, sociomedical sciences and community medicine at Boston University School of Medicine. “The difference between Tibetan and Western disease pathologies represents the need for evidence-based complementary therapies, such as the Tibetan monks in exile and other religious refugee populations,” said Grodin.

Tibetan Buddhist tradition dictates that the cure for suffering is enlightenment, attainable through meditation. When this occurs, the body is freed from anxieties and fears. The monks who were treated for PTSD and srog-rLung are finding that meditation, once second nature, has become difficult after nights filled with flashbacks that put the monks in a state of hyper-vigilance for the next day.

According to the researchers, in order to provide complimentary therapy for the monks, eastern and western medicine needed to be integrated to properly address both conditions. The spiritual aspect of the Tibetan medical model, which is at the core of the monks’ experience of illness, guided this research. Ancient Tibetan Bon tradition of yogic practice was used to induce the mind into a relaxed state necessary to purify oneself through motion. This yogic practice combines movement of the body and controlled breath with movements of the mind to bring mental stability and offers an alternative to the monks’ inability to eliminate invasive thoughts. Another therapy that was used is singing bowl therapy—a form of music therapy, as sound has a direct connection to the heart, which aligns with srog-rLung experienced by the monks.

Grodin said the refugee health center at BMC integrated techniques of western medicine, such as anti-depressant prescribing and psychotherapy, with Tibetan healing practices, including medicines prescribed by Tibetan Amchi, meditation advice, Tai Chi and Qi Gong exercises. Grodin is trained in traditional Chinese medicine, such as acupuncture and meditation.

Other authors on the publication were Adriana Lee Benedict of Harvard College and Linda Mancini of the LamRim Buddhist Center and the BCRHHR.

Researchers have found what they say is some of the first unambiguous evidence that an animal other than humans can make spontaneous plans for future events. The report in the March 9th issue of Current Biology, a Cell Press publication, highlights a decade of observations in a zoo of a male chimpanzee calmly collecting stones and fashioning concrete discs that he would later use to hurl at zoo visitors.

"These observations convincingly show that our fellow apes do consider the future in a very complex way," said Mathias Osvath of Lund University. "It implies that they have a highly developed consciousness, including life-like mental simulations of potential events. They most probably have an 'inner world' like we have when reviewing past episodes of our lives or thinking of days to come. When wild chimps collect stones or go out to war, they probably plan this in advance. I would guess that they plan much of their everyday behavior."

While researchers have observed many ape behaviors that could involve planning both in the wild and in captivity, it generally hasn't been possible to judge whether they were really meeting a current or future need, he added. For instance, when a chimp breaks a twig for termite fishing or collects a stone for nut cracking, it can always be argued that they are motivated by immediate rather than future circumstances.

And that's what makes the newly described case so special, Osvath said. It is clear that the chimp's planning behavior is not based on a "current drive state." In contrast to the chimp's extreme agitation when throwing the stones, he was always calm when collecting or manufacturing his ammunition.

Osvath said he thinks wild chimps in general, as well as other animals, probably have the planning ability demonstrated by the individual described in the study. Indeed, experiments conducted recently with other captive chimpanzees have shown they are capable of making such plans. (Some have argued, however, that those findings could be the result of experimental artifacts.)

"I think that wild chimpanzees might be even better at planning as they probably rely on it for their daily survival," Osvath said. "The environment in a zoo is far less complex than in a forest. Zoo chimps never have to encounter the dangers in the forest or live through periods of scarce food. Planning would prove its value in 'real life' much more than in a zoo."

Oedipus Wrecked: Study Supporting the Mother of All Psychological Complexes Withdrawn by Brendan Borrell

A journal retracts a paper that supported the idea that your wife is likely to look like your mother, but others say that Freud's theory may still hold water

Cell phones are a danger on the road in more ways than one. Two new studies show that talking on the phone while traveling, whether you're driving or on foot, is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers. The new studies, lead-authored by Rutgers University, Newark, Economics Professor Peter D. Loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths attributed to cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. However, this reduction in fatalities disappeared once the numbers of phones in use reached a "critical mass" of 100 million, the study found.

These studies looked at cell phone use and motor vehicle accidents from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven.

The studies found the cell phone-fatality correlation to be true even when weighing in factors such as speed, alcohol consumption, and seat belt use.

Loeb and his co-author determined that, at the current time, cell phone use has a "significant adverse effect on pedestrian safety" and that "cell phones and their usage above a critical threshold adds to motor vehicle fatalities." In the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a "life-saving effect" in pedestrian and traffic accidents, Loeb notes. "Cell-phone users' were able to quickly call for medical assistance when involved in an accident. This quick medical response actually reduced the number of traffic deaths for a time," Loeb hypothesizes.

However, this was not the case when cells were first used in the mid-1980s, when they caused a "life-taking effect" among pedestrians, drivers and passengers in vehicles. In those early days, when there were fewer than a million phones, fatalities increased, says Loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there weren't enough cell phones in use to make a difference in summoning help following an accident, he explains.

The "life-saving effect" occurred as the volume of phones grew into the early 1990s, and increasing numbers of cells were used to call 911 following accidents, leading to a drop in fatalities, explains Loeb. But this life-saving effect was canceled out once the numbers of phones reached a "critical mass" of about 100 million and the "life-taking effect" – increased accidents and fatalities -- outweighed the benefits of quick access to 911 services, according to Loeb.

"The cell phone effect on pedestrian fatalities" (Transportation Research Part E, Elsevier, Vol. 45, Issue 1, January 2009, with William A. Clarke, Bentley University, Waltham, MA,) looked at pedestrian fatalities related to cell phone use; the still-to-be-released "The impact of cell phones and BAC Laws on Motor Vehicle Fatality Rates" (Applied Economics, Loeb, Clarke and Richard Anderson, New Jersey City University), examines all cell-related traffic fatalities. Loeb and his co-authors used econometric models to analyze data from a number of government and private studies, including those by the National Highway Traffic Safety Administration, the Department of Transportation, MADD, and the U.S. Census Bureau, among others.

He and his co-authors recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and pedestrians, to reduce the number of fatalities.

General anesthesia can be tolerated by patients older than 65

Contrary to conventional medical wisdom, a new study by NYU Langone Medical Center researchers shows that healthy elderly patients with severe to profound hearing loss can undergo a surgical procedure to receive cochlear implants with minimal risk. "Due to concerns about the effects of general anesthesia, many elderly people with hearing loss are not receiving the implants which can significantly improve their hearing and quality of life," according to Anil Lalwani, M.D., Mendik Foundation Professor of Otolaryngology and Chairman of the Department of Otolaryngology at NYU School of Medicine and a study co-author. "The elderly are often incorrectly considered too fragile for this life transforming technology that can deliver them from a world of silence and loneliness to a world of hearing and engagement," says Dr. Lalwani. The new study is published in the February issue of the journal The Laryngoscope.

The National Institute on Aging estimates that about one-third of Americans between ages 65 and 74 have hearing difficulty – and that number increases to 50 percent in people 85 and older. In about 10% of the elderly, the impairment is so severe that conventional hearing aids provide little benefit. The inability to communicate interferes greatly with daily living and can lead to cognitive impairment, personality changes, depression, reduced functional status and social isolation.

The researchers conducted a retrospective chart review of 70 patients over 70 years of age who received cochlear implants under general anesthesia at NYU Langone Medical Center between 1984 and 2007. The patients were divided into risk groups and intraoperative and postoperative anesthesia-related complications were identified. Most patients tolerated the procedure and there was no long-term morbidity or mortality related to the surgery or anesthesia.

The researchers concluded that general anesthesia is well tolerated by elderly patients undergoing cochlear implantation. Any pre - existing medical condition is a better predictor of intraoperative and postoperative complication than age alone, they observed. Jung T. Kim, M.D. Vice chairman of the Department of Anesthesiology at NYU School of Medicine and a study co-author said "As seniors embrace a healthy and active lifestyle, it is important that age alone should not deter a person from having surgery that could potentially improve their quality of life."

Before flying off the handle the next time someone cuts you off in traffic, consider the latest research from Yale School of Medicine researchers that links changes brought on by anger or other strong emotions to future arrhythmias and sudden cardiac arrests, which are blamed for 400,000 deaths annually.

The study—led by Rachel Lampert, M.D., associate professor of medicine at Yale School of Medicine, and published in the Journal of the American College of Cardiology—deepens our understanding of how anger and other types of mental stress can trigger potentially lethal ventricular arrhythmias.

Lampert and her team studied 62 patients with implantable cardioverter-defibrillators (ICDs) and enlarged hearts. They were monitored three months after the ICD was implanted and then given a mental stress test requiring them to recall a stressful situation that angered them.

Lampert and her team sought to discover whether T-wave alternans (TWA), which monitor electrical instability in the heart induced by anger, would predict future ventricular arrhythmias. The team found that those in the group with more anger-induced electrical instability were more likely to experience arrhythmias one year after the study than those in the control group.

"Further studies are needed to determine whether there is a role for therapies which may reduce anger and the body's response to stress, thereby preventing arrhythmias in those at risk," said Lampert.

Lampert's work builds on past research linking strong emotion to sudden cardiac death. It has been found that devastating disasters, such as earthquakes, are linked to sudden death.

The Declaration of Independence may proclaim that all men are created equal, but American whites tend to distribute their prejudice unequally toward certain members of minority groups, according to new research.

A series of six studies conducted by University of Washington and Michigan State University psychologists shows that whites react more negatively to racial minority individuals who strongly identify with their racial group than to racial minority individuals who weakly identify with their group. The research, published in the current issue of the Journal of Personality and Social Psychology, provides an explanation for why some Blacks report personally experiencing more prejudice than others.

"Research has shown that the more minorities identify with their group, the more prejudice they report experiencing," said Kaiser. "Most research has explained this finding by focusing on factors within minorities that make some individuals more susceptible to perceiving prejudice than others. Our studies provide an alternative explanation by showing that whites react more negatively toward strongly identified minorities than weakly identified ones."

The researchers believe strongly identified minorities are not paranoid in claiming they experience increased levels of prejudice and weakly identified minorities are not being self-deceptive when they report experiencing low levels of prejudice, said Cheryl Kaiser, a UW assistant psychology professor and lead author of the paper. Instead, they just may simply be reporting on reality as they experience it.

"Take a situation where a person is ambiguously rejected for a new job," she said. "A person with a strong minority identification might wonder if the rejection was due to prejudice while one with a weak minority identification might not. If you experience more prejudice you expect more prejudice. These things work in tandem and feed each other."

Kaiser and her colleague recruited nearly 400 college students for the six studies that measured whites' attitudes toward Blacks and Latinos. They also were surveyed on their general attitudes about Blacks or Latinos, depending on the study. In the studies, minorities were either described as being strongly identified (where their group was very important and a central aspect of their self) or weakly identified (where their group was less important and not at the core of their self).

She said individuals typically want to be around others who share their values and exclude people who don't share those values or world views. The research indicated that whites perceived strongly identified minorities as less likely to share similar worldviews with them relative to weakly identified minorities.

"We are not arguing that minorities should not identify with their group," said Kaiser. "Such identification can be important and provides meaning, self worth and identity. Some research about prejudice has tended to lump members of minorities into homogenous groups. But there is a lot of heterogeneity. People differ in looks, language ability, attitudes and many other ways, but we tend not to pay attention to these factors. That's why it is important to identify those subsets in groups, why people react to them and what are the active ingredients of prejudice. Whites need to understand that they distribute prejudice unevenly and target those who strongly self-identify as being Black."

Dreams can carry more weight than conscious thoughts, say researchers

While science tries to understand the stuff dreams are made of, humans, from cultures all over the world, continue to believe that dreams contain important hidden truths, according to newly published research.

In six different studies, researchers surveyed nearly 1,100 people about their dreams. "Psychologists' interpretations of the meaning of dreams vary widely," said Carey Morewedge, an assistant professor at Carnegie Mellon University and the study's lead author. "But our research shows that people believe their dreams provide meaningful insight into themselves and their world."

The article appears in the February issue of the Journal of Personality and Social Psychology, published by the American Psychological Association.

In one study that surveyed general beliefs about dreams, Morewedge and co-author Michael Norton, an assistant professor at Harvard Business School, surveyed 149 university students in the United States, India and South Korea. The researchers asked the students to rate different theories about dreams. Across all three cultures, an overwhelming majority of the students endorsed the theory that dreams reveal hidden truths about themselves and the world, a belief also endorsed by a nationally representative sample of Americans.

In another study reported in the article, the researchers wanted to explore how dreams might influence people's waking behavior. They surveyed 182 commuters at a Boston train station, asking them to imagine that one of four possible scenarios had happened the night before a scheduled airline trip: The national threat level was raised to orange, indicating a high risk of terrorist attack; they consciously thought about their plane crashing; they dreamed about a plane crash; or a real plane crash occurred on the route they planned to take. A dream of a plane crash was more likely to affect travel plans than either thinking about a crash or a government warning, and the dream of a plane crash produced a similar level of anxiety as did an actual crash.

Finally, the researchers wanted to find out whether people perceive all dreams as equally meaningful, or whether their interpretations were influenced by their waking beliefs and desires. In another study, 270 men and women from across the United States took a short online survey in which they were asked to remember a dream they had had about a person they knew. People ascribed more importance to pleasant dreams about a person they liked as compared to a person they did not like, while they were more likely to consider an unpleasant dream more meaningful if it was about a person they disliked.

"In other words," said Morewedge, "people attribute meaning to dreams when it corresponds with their pre-existing beliefs and desires. This was also the case in another experiment which demonstrated that people who believe in God were likely to consider any dream in which God spoke to them to be meaningful; agnostics, however, considered dreams in which God spoke to be more meaningful when God commanded them to take a pleasant vacation than when God commanded them to engage in self-sacrifice."

The authors say more research is needed to explore fully how people interpret their dreams, and in what cases dreams may actually reveal hidden information.. "Most people understand that dreams are unlikely to predict the future but that doesn't prevent them from finding meaning in their dreams, whether their contents are mundane or bizarre," said Morewedge.

Violent video games and movies make people numb to the pain and suffering of others, according to a research report published in the March 2009 issue of Psychological Science. The report details the findings of two studies conducted by University of Michigan professor Brad Bushman and Iowa State University professor Craig Anderson.

The studies fill an important research gap in the literature on the impact of violent media. In earlier work, Bushman and Anderson demonstrated that exposure to violent media produces physiological desensitization---lowering heart rate and skin conductance---when viewing scenes of actual violence a short time later. But the current research demonstrates that violent media also affect someone's willingness to offer help to an injured person, in a field study as well as in a laboratory experiment.

"These studies clearly show that violent media exposure can reduce helping behavior," said Bushman, professor of psychology and communications and a research professor at the U-M Institute for Social Research. "People exposed to media violence are less helpful to others in need because they are 'comfortably numb' to the pain and suffering of others, to borrow the title of a Pink Floyd song," he said.

In one of the studies, 320 college students played either a violent or a nonviolent video game for approximately 20 minutes. A few minutes later, they overheard a staged fight that ended with the "victim" sustaining a sprained ankle and groaning in pain. People who had played a violent game took significantly longer to help the victim than those who played a nonviolent game---73 seconds compared to 16 seconds. People who had played a violent game were also less likely to notice and report the fight. And if they did report it, they judged it to be less serious than did those who had played a nonviolent game.

In the second study, the participants were 162 adult moviegoers. The researchers staged a minor emergency outside the theater in which a young woman with a bandaged ankle and crutches "accidentally" dropped her crutches and struggled to retrieve them. The researchers timed how long it took moviegoers to retrieve the crutches. Half were tested before they went into the theater, to establish the helpfulness of people attending violent vs. nonviolent movies. Half were tested after seeing either a violent or a nonviolent movie. Participants who had just watched a violent movie took over 26 percent longer to help than either people going into the theater or people who had just watched a nonviolent movie.

Can money make us happy if we spend it on the right purchases? A new psychology study suggests that buying life experiences rather than material possessions leads to greater happiness for both the consumer and those around them. The findings will be presented at the Society for Personality and Social Psychology annual meeting on Feb. 7. The study demonstrates that experiential purchases, such as a meal out or theater tickets, result in increased well-being because they satisfy higher order needs, specifically the need for social connectedness and vitality -- a feeling of being alive.

"These findings support an extension of basic need theory, where purchases that increase psychological need satisfaction will produce the greatest well-being," said Ryan Howell, assistant professor of psychology at San Francisco State University. Participants in the study were asked to write reflections and answer questions about their recent purchases. Participants indicated that experiential purchases represented money better spent and greater happiness for both themselves and others. The results also indicate that experiences produce more happiness regardless of the amount spent or the income of the consumer.

Experiences also lead to longer-term satisfaction. "Purchased experiences provide memory capital," Howell said. "We don't tend to get bored of happy memories like we do with a material object. People still believe that more money will make them happy, even though 35 years of research has suggested the opposite," Howell said. "Maybe this belief has held because money is making some people happy some of the time, at least when they spend it on life experiences."

"The mediators of experiential purchases: Determining the impact of psychological need satisfaction" was conducted by Ryan Howell, assistant professor of psychology at San Francisco State University and SF State graduate Graham Hill.

Arrangement of receptors appears uniformly random across individuals and species

Despite the striking aromatic differences between coffee, peppermint, and pine, a new mapping of the nose's neural circuitry suggests a haphazard patchwork where the receptors for such disparate scents are as likely as not to be neighbors. Inexplicably, this seemingly random arrangement is faithfully preserved across individuals and even species, with cells that process the same scent located in precisely the same location on the olfactory bulb, the brain's first processing station for odors. The crazy-quilt map of odor-processing neurons on the front lines of the olfactory system is described by Harvard University neuroscientists in the February issue of the journal Nature Neuroscience.

"It had been thought that the layout of the olfactory bulb was variable from individual to individual, but followed a chemotopic order where cells handling similar odor responses are near each other," says Markus Meister, the Jeff C. Tarr Professor of Molecular and Cellular Biology in Harvard's Faculty of Arts and Sciences. "Here we show that the layout is actually very precise -- the same from animal to animal -- but doesn't appear to follow any chemotopic order whatsoever."

Working with mice and rats, Meister and colleague Venkatesh N. Murthy recorded neural responses to several hundred distinct odors, including anise, beer, cloves, coffee, ginger, lemon, orange, peppermint, pine, rose, and even fox pheromones. The neuroscientists found that across individuals and even across the two species, bundles of neurons from a given type of odor receptor -- known as glomeruli -- were found in almost exactly the same spot on the olfactory bulb, a sensory structure measuring some four to five millimeters across and located at the very front of the brain.

"Glomeruli from different receptors line the surface of the olfactory bulb like an array of close-packed marbles," says Murthy, professor of molecular and cellular biology at Harvard. "Across individuals the location of a given glomerulus varies by only one array position. Compared to the size of the map, this represents a remarkable developmental precision of one part in 1,000." Meister and Murthy then analyzed whether nearby glomeruli detect similar odors, such as those with similar chemical structures. Neuroscientists have previously hypothesized axes of similarities along which odors might be classified. "One might expect that nearby glomeruli should have similar odor sensitivities," Meister says, "but we were surprised to find this was not the case. The odor response spectra of two neighboring glomeruli were as dissimilar as those of distant glomeruli."

This seemingly haphazard layout of sensory properties stands in marked contrast to other brain maps, such as those governing vision, touch, and hearing. In these three cases, our brains represent the outside world using ordered maps -- such as when neighboring points in visual space activate neighboring points on the retina. "That sort of arrangement makes sense, since most brain computation is local, relying on short connections between nearby cells," Murthy says. "This is necessary because the connections between neurons occupy most of the volume available to the brain, and long-distance connections require more of this volume."

Meister and Murthy suspect that the deliberate randomness in rodents' odor maps is likely also found in humans, which have only one-third as many receptors but are capable, in some extreme cases, of discerning tens of thousands of distinct smells.

Meister and Murthy's co-authors on the Nature Neuroscience paper are Edward R. Soucy, Dinu F. Albeanu, and Antoniu L. Fantana, all of Harvard's Department of Molecular and Cellular Biology and Center for Brain Science. Their work was funded by Harvard University.

Eyewitness testimony is a crucial part of many criminal trials even though research increasingly suggests that it may not be as accurate as we (and many lawyers) would like it to be. For example, if you witness a man in a blue sweater stealing something, then overhear people talking about a gray shirt, how likely are you to remember the real color of the thief's sweater? Studies have shown that when people are told false information about an event, they become less likely to remember what actually happened - it is easy to mix up the real facts with fake ones. However, there is evidence that when people are forced to recall what they witnessed (shortly after the event), they are more likely to remember details of what really happened.

Psychologists Jason Chan of Iowa State University, Ayanna Thomas from Tufts University and John Bulevich from Rhode Island College wanted to see how providing false information following a recall test would affect volunteers' memories of an event that they witnessed. A group of volunteers watched the first episode of "24" and then either took an immediate recall test about the show or played a game. Next, all of the subjects were told false information about the episode they had seen and then took a final memory test about the show.

The results, reported in the January issue of Psychological Science, a journal of the Association for Psychological Science, were surprising. The researchers found that the volunteers who took the test immediately after watching the show were almost twice as likely to recall false information compared to the volunteers who played the game following the episode.

The results of a follow-up experiment suggest that the first recall test may have improved subjects' ability to learn the false information - that is, the first test enhanced learning of new and erroneous information. These findings show that recently recalled information is prone to distortion. The authors conclude that "this study shows that even psychologists may have underestimated the malleability of eyewitness testimony."

Trials showing a positive treatment effect, or those with important or striking findings, were much more likely to be published in scientific journals than those with negative findings, a new review from The Cochrane Library has found.

"This publication bias has important implications for healthcare. Unless both positive and negative findings from clinical trials are made available, it is impossible to make a fair assessment of a drug's safety and efficacy," says lead researcher, Sally Hopewell of the UK Cochrane Centre in Oxford, UK.

The international team of researchers carried out a systematic review of all the existing research in this area. In addition to showing that negative results were published less often, they found that if these results were eventually published, they would take between one and four more years to appear in journals than studies showing positive results.

Results from one of the five studies in the review indicated that investigators and not editors might be to blame. The reasons most commonly given for not publishing were that investigators thought their findings were not interesting enough or did not have time. "The registration of all clinical trial protocols before they start should make it easier to identify where we are missing results," says Kay Dickersin from Johns Hopkins University in Baltimore, USA, another of the researchers on this project.

One of the other researchers, Kirsty Loudon, based in Scotland, adds, "Registration of trials and their results would help people conducting systematic reviews to look at both published and unpublished evidence, to reach reliable conclusions."

The researchers say their study also highlights the need for a worldwide commitment to the disclosure of the findings of clinical trials. Mike Clarke of Trinity College Dublin in Ireland, says, "The World Health Organisation recently found widespread support for the development of such a process."

Andy Oxman from the Norwegian Knowledge Centre for Health Services concludes, "Healthcare decisions need to be based on all the evidence, not just the most exciting results."

New research helps explain link between social rejection and aggressive behavior

People who feel socially rejected are more likely to see others' actions as hostile and are more likely to behave in hurtful ways toward people they have never even met, according to a new study. The findings may help explain why social exclusion is often linked to aggression – which sometimes boils over dramatically, as in the case of school shootings, for example.

"Prior case studies show the majority of school shooters have experienced chronic peer rejection," said the study's lead author, C. Nathan DeWall, Ph.D., from the University of Kentucky. "And while not everyone who feels rejected reacts violently, we found they tend to act out aggressively in other ways. We wanted to help explain psychologically why this happens." A full report of the study appears in the January issue of the Journal of Personality and Social Psychology, published by the American Psychological Association.

DeWall conducted four separate experiments with 190 participants, all college students.

In one experiment, 30 participants completed a personality test and were given bogus feedback about the results. A third of the participants, the excluded group, were told their personalities would mean they would probably end up alone later in life. The rest of the participants, the control group, were either told they would have many lasting and meaningful relationships or were given no feedback at all.

All participants were then instructed to read a personal essay supposedly written by another participant, whom they did not know. The essay was about an event in which the author's actions could be perceived as either assertive or hostile and the participants rated their impression of the author's actions. They were also told that the author was up for a research assistant position and were asked whether they thought the author would be a good candidate, based on what they had read.

Participants who were told they were going to have a lonely life perceived the author's actions as significantly more hostile and gave a much more negative evaluation than those in the control groups. The authors also note that the participants' moods did not seem to differ among the different groups, which led them to conclude that the participants' emotional response to their personality results did not play a role in how they performed in the experiments.

In another experiment, 32 students underwent the same bogus personality evaluation and rated the same essay from the previous experiment. Again, some were told they would lead a lonely life while others were assigned to the control groups. This time, participants were led to believe they were playing a reaction-time computer game with another person in the lab whom they could not see and had never met. During the game, the loser of each trial was forced to listen to a blast of white noise through headphones. The participants could set the noise's intensity level and duration.

Those who were told they were going to have a lonely life blasted a higher level of the painful noise than those in the control groups. "Across all experiments, the participants who experienced some form of social rejection acted in similar ways," said DeWall. "This suggests these people feel betrayed by others. In turn, they see otherwise neutral actions as hostile and behave badly towards others."

Prior research has examined whether emotions play a role in this type of aggression, but this study's researchers say their findings do not support this idea. "Excluded people see the world through blood-colored glasses and it is our hope that this research can lead to a better understanding of why rejection causes aggression and what we can do to prevent such unwanted and harmful behavior," said DeWall.

The Persistence of Racism

Recent research concludes that while people predict they will react negatively to racial slurs, their behavior proves otherwise.

60-Second Psych from Scientific American podcasts
13 January 2009

No such gender disparity exists for younger women

Younger women have equivalent access to kidney transplants compared with their male counterparts, but older women receive transplants much less frequently than older men, according to a study appearing in the March 2009 issue of the Journal of the American Society Nephrology (JASN). The results suggest that steps are needed to ensure that women are provided with equal opportunities to receive kidney transplants as they age.

Researchers have reported that women have less access to kidney transplants than men, but this recent study indicates that this disparity does not affect all women. Dorry Segev, MD, of the Johns Hopkins Medical Institutions in Baltimore, MD, and his colleagues discovered this by studying the United States Renal Data System, which collects, analyzes, and distributes information about end-stage kidney disease in this country. Their analysis included 563,197 patients with end-stage kidney disease diagnosed between 2000 and 2005.

The investigators found that while young women in this group had equivalent access to transplantation when compared with their male counterparts, access for older women decreased significantly. Specifically, women aged 18 to 45 years had access to transplantation that was equivalent to men, women aged 46 to 55 years had 3% less access, women aged 56 to 65 years had 15% less access, women aged 66 to 75 had 29% less access, and women over 75 years had 59% less access.

These disparities existed for both access to the deceased donor waiting list as well as access to live donations. However, the gender disparities were limited to referral to the waiting list—once a woman was on the transplant list, her chances of receiving a transplant were equivalent to a man's. This is very different from other disparities in transplantation such as race disparities, in which African Americans are less likely to be referred to the waiting list and are also less likely to receive a transplant once on the list.

Dr. Segev and his team also found that for every age group analyzed in this study, women had a similar or slightly higher survival benefit from transplantation compared with men, indicating that there is no reason to deny women transplants as they age.

These findings could help researchers develop ways to reduce disparities in kidney allocation. "Knowing that the gender disparity is limited to older women indicates that efforts should be made to identify specific differences between older men and older women—rather than general differences between all men and women—in an effort to minimize the gender disparity in access to transplantation," said Dr. Segev.

The Art of Diagnosis (~ 18 min. podcast)

Does very severe PMS constitute a mental disorder? That's one of many questions facing psychiatrists as they work to revise the Diagnostic and Statistical Manual of Mental Disorders or DSM, the definitive compendium of our psychic maladies. Because the DSM influences not just doctors and patients but medical research, insurance companies, the pharmaceutical industry, advertising and the culture at large, controversy surrounding its new edition abounds. Brooke looks at this powerful book

On the Media: This Week from NPR
December 26, 2008

Sexual abuse in childhood increases the risk of suicide in men by up to ten times, say researchers from the University of Bath. A recent study of Australian men has found that those who were sexually abused as children are more likely than women to contemplate taking their own lives. Whilst gender and mental health problems are the most important risk factors for contemplating suicide, it is increasingly acknowledged that traumatic experiences such as childhood sexual abuse may be a significant risk factor.

Dr Patrick O'Leary and Professor Nick Gould from the University's Department of Social & Policy Sciences conducted a series of surveys and face-to-face interviews with men in a study funded by the University of South Australia. The findings have been published online in the peer-reviewed British Journal of Social Work.

They found that men who were sexually abused as children were up to ten times more likely to have suicidal tendencies; many of these men had not been clinically diagnosed as depressed. Dr O'Leary said: "Childhood sexual abuse is an under-recognised problem in men - most of the studies exploring the link with suicide have been in women. "Men are particularly vulnerable because they don't like to talk to others about their problems. It's difficult for anyone to come to terms with traumatic experiences such as childhood sexual abuse, but for men the stigma is worse because they don't tend to confide in their friends as much.

"Many suffer feelings of failure and isolation and think that it is a sign of weakness to discuss their past abuse with others. Men also tend to visit their doctors less frequently, so those who are at risk of suicide often slip under the radar of the healthcare system. Men are particularly vulnerable to suicide and are three and a half times more likely than women to end their own lives, with more than 2,000 men dying as a result of suicide in the UK each year. However it is estimated that for every suicide, there are between 20 and 25 failed attempts. We carried out the study in Australia, which shares a similar 'stiff upper lip' culture that we see in the UK. We're planning to do our next study in the UK to see if there are any differences."

Dr O'Leary suggested that lives could be potentially saved if abuse victims are identified earlier. He explained: "The abuse that these men have suffered as children often sees them attempting to cope by suppressing the experience through substance abuse, alcohol abuse and obsessive behaviour, with many ending up in the criminal justice system. "Greater awareness in the healthcare and criminal justice systems will help identify those who are at risk and give them treatment before it is too late."

We've all experienced a "good cry"—whether following a breakup or just after a really stressful day, shedding some tears can often make us feel better and help us put things in perspective. But why is crying beneficial? And is there such a thing as a "bad cry"? University of South Florida psychologists Jonathan Rottenberg and Lauren M. Bylsma, along with their colleague Ad J.J.M. Vingerhoets of Tilburg University describe some of their recent findings about the psychology of crying in the December issue of Current Directions in Psychological Science, a journal of the Association for Psychological Science.

The psychologists analyzed the detailed accounts of more than 3000 recent crying experiences (which occurred outside of the laboratory) and found that the benefits of crying depend entirely on the what, where and when of a particular crying episode. The researchers found that the majority of respondents reported improvements in their mood following a bout of crying. However, one third of the survey participants reported no improvement in mood and a tenth felt worse after crying. The survey also revealed that criers who received social support during their crying episode were the most likely to report improvements in mood.

Research to date has not always produced a clear picture of the benefits of crying , in part because the results often seem to depend on how crying is studied. The authors note several challenges in accurately studying crying behavior in a laboratory setting. Volunteers who cry in a laboratory setting often do not describe their experiences as being cathartic or making them feel better. Rather, crying in a laboratory setting often results in the study participants feeling worse; this may be due to the stressful conditions of the study itself, such as being videotaped or watched by research assistants. This may produce negative emotions (such as embarrassment), which neutralize the positive benefits usually associated with crying.

However, these laboratory studies have provided interesting findings about the physical effects of crying. Criers do show calming effects such as slower breathing, but they also experience a lot of unpleasant stress and arousal, including increased heart rate and sweating. What is interesting is that bodily calming usually lasts longer than the unpleasant arousal. The calming effects may occur later and overcome the stress reaction, which would account for why people tend to remember mostly the pleasant side of crying.

Research has shown that the effects of crying also depend on who is shedding the tears. For example, individuals with anxiety or mood disorders are least likely to experience the positive effects of crying. In addition, the researchers report that people who lack insight into their emotional lives (a condition known as alexithymia) actually feel worse after crying. The authors suggest that for these individuals, their lack of emotional insight may prevent the kind of cognitive change required for a sad experience to be transformed into something positive.

“In psychiatry no one knows the causes of anything, so classification can be driven by all sorts of factors” — political, social and financial. “What you have in the end,” Mr. Shorter [a historian of psychiatry] said, “is this process of sorting the deck of symptoms into syndromes, and the outcome all depends on how the cards fall.”

The DSM-V is expected to fall into place in 2011-2012.

The article, Psychiatrists Revise the Book of Human Troubles, can be found at the New York Times online

Chimpanzees recognize their pals by using some of the same brain regions that switch on when humans register a familiar face, according to a report published online on December 18th in Current Biology, a Cell Press publication. The study—the first to examine brain activity in chimpanzees after they attempt to match fellow chimps' faces—offers new insight into the origin of face recognition in humans, the researchers said.

"We can learn about human origins by studying our closest relatives," said Lisa Parr, a researcher at the Yerkes National Primate Research Center, Emory University. "We can discover what aspects of human cognition are really unique and which are present in other animals."

Earlier studies had shown that chimpanzees, like humans, are adept at recognizing their peers. "We knew [from behavioral studies] that chimps and humans process faces similarly," Parr said. "We wondered whether similar brain regions were responsible, and, for the most part, they seem to be."

In the study, the researchers examined brain activity (as reflected by blood sugar metabolism) in five chimpanzees by using Positron Emission Tomography (PET) scans. (Parr noted that the Yerkes National Primate Research Center is the only center of its kind to have on-site MRI, PET, and cyclotron facilities, making studies like Parr's possible.) The chimps were shown three faces, two of which were identical, while the third was of a different chimp. Subjects were then asked to indicate the faces that matched. In other trials, the chimpanzees did the same matching task with clip art images.

The imaging studies revealed significant face-selective activity in brain regions known to make up the distributed cortical face-processing network in humans. Further study showed distinct patches of activity in a region known as the fusiform gyrus—the primary site of face-selective activity in humans—when chimps observed faces.

The researchers concluded that the brain regions that are active during facial recognition may represent part of a distributed neural system for face processing in chimpanzees, like that proposed in humans, in which the initial visual analysis of faces activates regions in the occipital and temporal lobes of the cerebral cortex (a portion of the brain involved in memory, attention, and perceptual awareness) followed by additional processing in the fusiform gyrus and other regions.

Parr emphasized, however, that there have been decades of research on face processing in the human brain. As the first such study in chimpanzees, the new findings raise more questions than they can answer, and follow-up studies are underway.

Adolescents with major depression who received cognitive behavioral therapy (CBT) after responding to an antidepressant were less likely to experience a relapse or recurrence of symptoms compared to teens who did not receive CBT, according to a small, NIMH-funded pilot study published in the December 2008 issue of the Journal of the American Academy of Child and Adolescent Psychiatry.

Background
Studies have found that adults with depression who have responded to medication treatment are less likely to have a relapse if they receive CBT during the follow-up treatment phase, according to researchers Betsy Kennard, Psy.D., of the University of Texas Southwestern Medical Center, and colleagues. Scientists theorize that initial antidepressant treatment may help improve symptoms enough so that a patient becomes more receptive to CBT or other psychosocial component. Kennard and colleagues aimed to determine if a similar sequential treatment strategy would be effective with depressed adolescents.

In this pilot study, 46 depressed youths ages 11 to 18 who had responded to 12 weeks of treatment with the antidepressant fluoxetine (Prozac) were randomly assigned to either six months of continued medication management (MM), or to medication management plus cognitive behavioral therapy (MM+CBT) designed to prevent relapse.

Results of the Study
Kennard and colleagues found that the youths who received only MM were significantly more likely to relapse than the youths who received MM+CBT. The researchers estimated that 37 percent of those in the MM group were likely to relapse, while 15 percent of those in the MM+CBT group were likely to relapse. Patients getting MM+CBT also reported higher rates of satisfaction compared to those getting MM only.

Significance
This pilot study demonstrates that, as in adult studies, introducing CBT in follow-up treatment after a patient responds to antidepressant treatment may be a promising strategy in preventing relapse among depressed adolescents.

What’s Next
The researchers currently are conducting a larger trial of MM+CBT to further evaluate the effectiveness of this treatment strategy in youths with depression.

Reference
Kennard B, et al. Cognitive-behavioral therapy to prevent relapse in pediatric responders to pharmacotherapy for major depressive disorder. Journal of the American Academy of Child and Adolescent Psychiatry. 2008 Dec; 47(12):1395-1404

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Posted at the National Institute of Mental Health (NIMH)
5 December 2008

To Get Good Grades, Get Good Sleep.

You’d think that college students would be experts at sleeping.  But odd hours, parties, cramming for tests, personal problems, self-medication with drugs or alcohol and general  can wreck a student’s sleep habits. Which can be bad for the body and the mind.

60-Second Psych from Scientific American podcasts
8 December 2008

Whispering bats are shrieking

Annemarie Surlykke from the University of Southern Denmark is fascinated by echolocation. She really wants to know how it works. Surlykke equates the ultrasound cries that bats use for echolocation with the beam of light from a torch: you won't see much with the light from a small bulb but you could see several hundred metres with a powerful beam. Surlykke explains that it's the same with echolocating bats. Some have big powerful calls for perception over a long range, while others are said to whisper; which puzzled Surlykke. How could 'whispering' bats echolocate with puny 70decibel cries that barely carry at all? Teaming up with her long time collaborator Elizabeth Kalko from the Smithsonian Tropical Research Institute and student Signe Brinkløv, Surlykke decided to measure the volume of a pair of whispering bat species' calls to find out how loud the whisperers are. They publish their discovery that whispering bats are really shrieking in The Journal of Experimental Biology on 12th December 2008 at http://jeb.biologists.org.

Travelling to the Smithsonian Research Institute's Barro Colorado Island in Panama, Surlykke decided to focus on two whispering members of the Phyllostomidae family: Artibeus jamaicensis and Macrophyllum macrophyllum. According to Surlykke, the Phyllostomidae family of bats are unique because of their remarkably diverse lifestyles and diets. Some feed on fast moving insects while others feast on fruit buried in trees, making them an ideal family to study to find out how echolocation works.

But measuring the volume of the bat's echolocation calls was extremely challenging. If Surlykke was going to get true volume measurements from hunting bats on the wing, she would have to be certain that the bats were facing head on and that she could measure their distance from the microphone that recorded the sound so that she could correct for the volume lost as the call travelled to the microphone. Setting up an array of four microphones, the team recorded 460 cries, which Surlykke eventually whittled down to 31 calls for M. macrophyllum and 19 for A. jamaicensis that she could use.

Correcting the volume measurements, Surlykke was delighted to find that far from whispering, the bats were shrieking. The tiny insectivore M. macrophyllum registered a top volume of 105decibel, while fruit feeding A. jamaicensis broke the record at 110decibel, a remarkable 100 times louder than a 70decibel bat whisper and almost twice as loud as A. jamaicensis.

Surlykke suspects that she can explain the differences in the animals' volumes by their different lifestyles. She explains that the relatively large A. jamaicensis feeds on fruit, which it probably locates through a combination of senses, including smell and short-range echolocation whispers. But the bats have to search over large areas to find fruiting trees, and Surlykke suspects that the bat uses its high volume, well-carrying shrieks for orientation in their complex forest environment.

However, tiny M. macrophyllum's lifestyle is completely different. They hunt for insects over water, scooping them up with their tail. Surlykke says that she suspected that M. macrophyllum would be louder because she couldn't see how the animals could locate moving insects with a low intensity echolocation call, but admits that she was amazed that they were so much louder and that they could also adjust the volume to match their prey.

Bluetooth device also blocks texting when key is in ignition

University of Utah researchers have developed an automobile ignition key that prevents teenagers from talking on cell phones or sending text messages while driving. The university has obtained provisional patents and licensed the invention – Key2SafeDriving – to a private company that hopes to see it on the market within six months at a cost of less than $50 per key plus a yet-undetermined monthly service fee.

"The key to safe driving is to avoid distraction," says Xuesong Zhou, an assistant professor of civil and environmental engineering who co-invented the system with Wally Curry, a University of Utah graduate now practicing medicine in Hays, Kan. "We want to provide a simple, cost-effective solution to improve driving safety." Zhou notes that "at any given time, about 6 percent of travelers on the road are talking on a cell phone while driving. Also at any given time, 10 percent of teenagers who are driving are talking or texting." Studies have shown drivers using cell phones are about four times more likely to get in a crash than other drivers. "As a parent, you want to improve driving safety for your teenagers," he says. "You also want to reduce your insurance costs for your teen drivers. Using our system you can prove that teen drivers are not talking while driving, which can significantly reduce the risk of getting into a car accident."

If things go as planned, the Key2SafeDriving system won't be sold directly to consumers by a manufacturer, but instead the technology may be licensed to cell phone service providers to include in their service plans, says Ronn Hartman, managing partner of Accendo LC. The Kaysville, Utah, company provides early stage business consulting and "seed funding." It has licensed the Key2SafeDriving technology from the University of Utah and is working to manufacture and commercialize it.

Hartman envisions gaining automobile and insurance industry backing so that Key2SafeDriving data on cell phone use (or non-use) while driving can be compiled into a "safety score" and sent monthly to insurance companies, which then would provide discounts to motorists with good scores. The score also could include data recorded via Global Positioning System (GPS) satellites on the driver's speeding, rapid braking or running of lights, which are calculated by comparing the driver's position with a database of maps, speed limits, stop lights and so on.

How Key2SafeDriving Works
The system includes a device that encloses a car key – one for each teen driver or family member. The device connects wirelessly with each key user's cell phone via either Bluetooth or RFID (radio-frequency identification) technologies. To turn on the engine, the driver must either slide the key out or push a button to release it. Then the device sends a signal to the driver's cell phone, placing it in "driving mode" and displaying a "stop" sign on the phone's display screen.

While in driving mode, teen drivers cannot use their cell phones to talk or send text messages, except for calling 911 or other numbers pre-approved by the parents – most likely the parents' own cell numbers. Incoming calls and texts are automatically answered with a message saying, "I am driving now. I will call you later when I arrive at the destination safely." When the engine is turned off, the driver slides the key back into the device, which sends a "car stopped" signal to the cell phone, returning it to normal communication mode. The device can't be "tricked" by turning the phone off and on again because the phone will receive the "driving mode" signal whenever the car key is extended.

Adult drivers cannot text or use a handheld cell phone, but the Key2SafeDriving system does allow them to talk using a hands-free cell phone – even though studies by University of Utah psychologists indicate hands-free phones are just as distracting as handheld phones. Curry agrees that driving while talking on any cell phone "is not safe," but he says the inventors have to face the practical issue of whether adults would buy a product to completely block their cell phone use while driving. Limiting some cell calls by adults "is a step in the right direction," he says. Zhou says the goal for adults is to improve safety by encouraging them to reduce the time they spend talking while driving. The encouragement could come in the form of insurance discounts by insurers, who would receive monthly scores from Key2SafeDriving showing how well an adult driver avoided talking while driving.

An Invention is Born
The new invention began with Curry, a Salt Lake City native who graduated from the University of Utah with an accounting degree and premedical training in 1993. He returned from the Medical College of Wisconsin for his surgical residency in urology at University Hospital during 1998-2003. He now is a urologist in Hays, Kan.

His concern with driving-while-talking began because, as a doctor, "the hospital is calling me all the time on my cell phone when I'm driving." One day while driving home, he saw a teenage girl texting while driving, making him worry about his 12- and 14-year-old daughters, who are approaching driving age. "I thought, this is crazy, there has got to be something to stop this, because not only is she putting people at risk, but so was I," Curry says. "It struck me pretty hard that something should be done."

Curry's initial idea was a GPS system to detect a moving cell phone and disable it when it moved at driving speeds. Meanwhile, someone else developed a similar system based on the same idea. But it cannot distinguish if the cell phone user is driving a car or is a passenger in a moving car, bus or train – a problem overcome by Key2SafeDriving.

In early 2008, Curry called Larry Reaveley, a civil engineering professor at the University of Utah, who suggested Curry contact Zhou, a specialist in "intelligent" transportation systems. Zhou and Curry then came up with the idea of blocking cell phone usage via a vehicle ignition key. Zhou, a native of Liuzhou, China, joined the University of Utah faculty in early 2007. He received his Ph.D. degree from the University of Maryland in 2004. He has worked for a California company that sold a product that provides traffic information to motorists using GPS satellites.

A short video about Key2SafeDriving may be viewed at:
http://www.youtube.com/watch?v=OEIMUsnvucE
Video credit: Ana Antunes, University of Utah

The video and additional information about Key2SafeDriving are available at:
http://www.Key2SafeDriving.net

Have you grown weary of reading the same favorite dinosaur or bug book over and over again to the youngsters in your life? Are you ready to shake up the regular line-up of bedtime stories? In time for holiday shopping, The American Association for the Advancement of Science (AAAS) has announced 19 finalists in the annual science book awards, which include science books for young children up to young adults.

In its fifth year, the AAAS/Subaru SB&F Prize for Excellence in Science Books is intended to promote science literacy. The list of 19 finalists in the 2009 competition appeared in the 5 December issue of the journal Science. Librarians selected the finalists from over 100 entries across the four award categories. Scientists will help choose a winner in each category. The winning entries will be announced 1 January 2009 and honored during a ceremony at the 2009 AAAS Annual Meeting in Chicago. Winners will receive $1,500 and a plaque.

Carolyn Phelan, a librarian at Northbrook Public Library in Northbrook, Ill., served as a judge for the children's science picture books category. Since she began her career as a children's librarian 30 years ago, Phelan has noticed that she now gets more requests for science books for younger children. The quality of the science books has also improved greatly during that time, she said. "There are better illustrations than in the past, more remarkable photos, more use of color. All of this makes the books more attractive to young children," Phelan said.

Engaging design is important for books intended for older children, too. "We look for books that are engaging, appealing and written with a layout that would appeal to teens," said Maren Ostergard, who has judged the young adult category since the AAAS/Subaru SB&F Prize began five years ago. "The books have to hold interest right off the bat or teens won't commit to the whole story," she said. Size also matters: can the book fit in a backpack? Is it too heavy to carry around? These are things that can also make a difference when marketing books to teenagers, Ostergard said.

Ostergard is an early literacy and outreach librarian in King County Library System in Seattle. She talks to school groups, provides library materials and resources to children in after school care and is "always trying to find good science books." Finding science books for young adults "takes some looking," Ostergard said. "They hear about fiction from their peers and the media, but I may be the only one who markets quality non-fiction to them. It's important to find good science and tell teens about it, because they don't get it otherwise."

The list of finalists is sent to libraries to encourage librarians to put the science books on display. "It's another way to get the word out about good science books," said AAAS' Malcomson.

Children's Science Picture Books (links to amazon.com/prices also amazon.com)

• Eggs. Marilyn Singer, illustrated by Emma Stevenson. Holiday House, New York, 2008. 32 pp. $11.53
  Eggs provide a shelter in which a developing animal can breathe, be nourished with food and drink, and grow. They are laid by birds, invertebrates, fish, amphibians, reptiles, and even some mammals. Singer presents examples of their innumerable shapes, sizes, colors, and patterns. She also discusses how burial, brooding, and nests protect eggs, and she describes varieties of hatching. Stevenson's detailed gouache paintings convey the eggs' allure.
  
  
• Sisters and Brothers: Sibling Relationships in the Animal World. Steve Jenkins (illustrator) and Robin Page. Houghton Mifflin, Boston, 2008. 32 pp. $10.88
  Animals and families always fascinate children, but the facts about siblings that fill this book will also engage adults. For example, young shrews line up holding each others' tails, with the mother leading the way. Female termites lay 30,000 eggs a day, whereas giant anteaters are always single offspring. Nile crocodiles cooperate even before they hatch, but hyena cubs can fight to the death. The authors' collages are sure to appeal to young readers.
  
  
• Spiders. Nic Bishop. Scholastic, New York, 2007. 48 pp. $12.23
  Spider enthusiasts and arachnophobes alike will be drawn to the amazing, up-close photographs in this informative introduction to these eight-legged predators. The concise, well-written text offers numerous interesting facts about spiders. For example, they were among the earliest terrestrial predators, having arisen more than 350 million years ago. And although "silk is the secret of spider success," many of the more than 38,000 species do not use webs. Fishing spiders dart over the water's surface, and some jumping spiders can leap 20 times their body length to pounce on prey.
  
  
• Wings. Sneed B. Collard III, illustrated by Robin Brickman. Charlesbridge, Watertown, MA, 2008. 32 pp. $13.73. Paper, $7.95
  Insects, birds, and bats all move through the air on wings. Collard introduces the diversity of these appendages and their uses. Wings can be covered with scales, feathers, or bare skin. They allow peregrines to twist and turn in a dive, leaf-nosed bats to lazily flap over the ground, milkweed bugs to move short distances among patches, and Arctic terns to migrate between the polar regions. They help animals chase, catch, flee, and mate. To illustrate this variety, Brickman sculpted painted paper into colorful collages.
  
  
• The Wolves Are Back. Jean Craighead George, illustrated by Wendell Minor. Dutton Juvenile, New York, 2008. 32 pp. $16.95
  The wolves of Yellowstone were once shot until they were eliminated. However, with changed values and the yearning to again hear howls in the wild, wolves were reintroduced to the national park in 1995. As the wolves multiplied, wildflowers reappeared (wolves chased away the mountain sheep that had eaten them) and birds returned (wolves hunted bison and elk that had trampled young aspen needed for perches and grasses needed for food). By following along as a wolf pup wanders the Lamar Valley, readers learn how wolves are even important to halting riverbank erosion. George's simple text and landscape artist Minor's beautiful illustrations convey the importance of maintaining all parts of ecosystems.
  

Middle Grades Science Books

• Cold Light: Creatures, Discoveries, and Inventions that Glow. Anita Sitarski. Boyds Mills Press, Honesdale, PA, 2007. 48 pp. $11.53
  This book's theme is make light not heat. Sitarski offers an information-packed but reader friendly account of chemical and biological sources of luminescence along with important discoveries from 1602 through to today's light-emitting diodes. Of course there are photos of fireflies and jellyfish, but the intriguing images also include a glowing chicken and art by Montana State University students who covered the walls of a darkened gallery with dishes containing luminescent marine bacteria.
  
  
• George Washington Carver. Tonya Bolden. Abrams Books for Young Readers (Abrams), New York, in association with the Field Museum, Chicago, 2008. 40 pp. $15.16
  Peanuts, sweet potatoes, and soybeans (and the products made from them) were key interests of horticulturist, educator, and inventor Carver. The ex-slave's research and teaching, which stressed scientific farming and soil conservation, helped improve agriculture in the South. Bolden's eloquent telling of Carter's life and accomplishments is enhanced with quotes from him and his contemporaries. The historical photos; evocative artifacts; and Carter's own drawings, paintings, and scientific illustrations will help entice young readers.
  
  
• How We Know What We Know About Our Changing Climate: Scientists and Kids Explore Global Warming. Lynne Cheery and Gary Braasch. Dawn, Nevada City, CA, 2008. 66 pp. $12.89
  The authors survey a wide range of indications that Earth's climate is changing. These clues include the earlier spring arrivals of migrating birds, earlier blooming by wildflowers and Washington, D.C.'s cherry trees, melting glaciers and icecaps, microfossils from cores of mud from the ocean floor, and bubbles of ancient air retrieved from cores of glacial ice. In his earlier Earth Under Fire, photojournalist Braasch visited climate researchers in the field to document their discoveries. Here he and Cherry (a seasoned author of environmental books for children) also spotlight citizen science and (especially) data that can be, and is, collected by children.
  
  
• Life on Earth - and Beyond: An Astrobiologist's Quest. Pamela S. Turner. Charlesbridge, Watertown, MA, 2008. 112 pp. $15.56. Paper, $10.16
  Turner approaches astrobiology through the experiences of Chris McKay. Most chapters resemble a travelogue, as she describes his traipsing around the world. He visits Antarctica's Dry Valleys, the Atacama and Sahara deserts, permafrost-covered tundra in Siberia, and the bottom of an Antarctic lake permanently capped by ice. Weaving the underlying science into her narrative, she explains how studying microbes from these extreme environments helps us understand whether life can exist in similar situations on Mars or other planet.
  
  
• What's Eating You? Parasites - the Inside Story. Nicola Davies, illustrated by Neal Layton. Candlewick, Cambridge, MA, 2007. 60 pp. $10.39
  This account of animals that live on or in other animals is more likely to delight than disgust. Zoologist Davies explains the advantages parasites find in being small and able to change body form during their lives. He describes the challenges they face in moving among hosts-a point reinforced in a playable "two-host tapeworm game." He also discusses parasites' amazing life cycles, their effects on hosts (including some benefits and examples of "mind control"), and some of the ways the hosts fight back. Layton's clever drawings complement the informative text.
  

Young Adult Science Books

• Dinosaur: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages. Thomas R. Holtz Jr., illustrated by Luis V. Rey. Random House, New York, 2007. 432 pp. $23.09
  Anyone with even a passing interest in dinosaurs should not miss this journey into their diverse and truly weird world. Holtz and his colleagues fill the book with fascinating details ranging from discoveries of new species (e.g., a sauropod, Amphicoelias, with a mass of 18 elephants) to old favorites (e.g., Tyrannosaurus rex, which may have lived and hunted in packs). They cover major and minor groups, predator-prey relations, social interactions within species, habitats and habits, and evolutionary trends. With its conversational tone and Rey's engaging illustrations, the book should appeal to young adults and a general audience alike.
  
  
• The Scent of Desire: Discovering Our Enigmatic Sense of Smell. Rachel Herz. Morrow, New York, 2007. 288 pp. $9.99
  Far from a prissy survey of perfumes and odor-it starts with the suicide of a rock singer who had lost his sense of smell-this book explores how and why smell is such a central component of our lives. Explaining basic neurobiological principles in clear language, Herz intermixes them with stories and personal accounts of her research and experiences. She describes olfactory technologies, such as the development of electronic noses, which are already beginning to be used in the food industry and might even help diagnose diseases. She also dreams of a gel that would boost olfactory receptor function and restore sensation to older individuals. Her account will stimulate readers' interests in psychology and neuroscience.
  
  
• The Telephone Gambit: Chasing Alexander Graham Bell's Secret. Seth Shulman. Norton, New York, 2008. 256 pp. $16.47. Paper, $10.17
  Who invented the telephone? Most people would answer Alexander Graham Bell-recall "Mr. Watson, come here!" In this well-researched and well-written account, Shulman argues that Bell furtively copied crucial aspects of his device from a patent application by Elisha Gray. The author weaves science, intrigue, and romance into a fast-paced narrative. He lays his evidence out clearly while carrying readers through the steps he took to build his thought-provoking case.
  
  
• Welcome to Your Brain: Why You Lose Your Car Keys But Never Forget How to Drive and Other Puzzles of Everyday Life. Sandra Aarnodt and Sam Wang. Bloomsbury, New York, 2008. 240 pp. $16.47. Paper, $10.20
  The neuroscientist authors offer a highly accessible and richly informative "user's guide" to our brains. They cover a broad range of topics, offering up-to-date information directed to answering questions of the curious public. They supplement their charming narrative with frequent and quite extensive sidebars that debunk myths, focus on specific issues, and offer practical tips. Eschewing didactical lecturing, their friendly and informal writing effectively engages the reader in a comfortable, interesting, and informative dialog.

Hands-On Science/Activity Books

• Animal Tracks and Signs. Jinny Johnson. National Geographic, Washington, DC, 2008. 192 pp. $16.47
  Whether they inhabit backyards, local fields or woods, or wilderness parklands, most animals can be hard to sight. But they do leave clues to their activities: tracks, nests, feeding remains, and dung. Johnson gives pointers on how to notice, record, and interpret such signs. In addition, she includes basic facts about the animals themselves. Mammals garner the most attention, while amphibians, reptiles, birds, insects, and other invertebrates are discussed in shorter sections. Although the book's global scope limits its coverage to some 400 selected examples, the information can often also be applied to closely related species. This enticing introduction should lead nature enthusiasts to seek additional details in field guides with a more restricted focus.
  
  
• The Brook Book. Jim Arnosky. Dutton Children's, New York, 2008. 32 pp. $12.47
  Budding naturalists who have access to any narrow, shallow stream will find this an inviting guide to the variety of observations they can make. It begins with appropriately simple explanations of the sources and fates of the water in a brook. There are plenty of activities to satisfy young explorers, including sketching flowers, collecting smooth stones, examining aquatic insects, watching birds, and looking for animal tracks. Parents will appreciate the emphasis on safety, while children should be attracted by Aronsky's alluring text and charming illustrations.
  
  
• Sound Projects with a Music Lab You Can Build. Robert Gardner. Enslow, Berkeley Heights, NJ, 2008. 128 pp. $31.93
  Gardner lays out hands-on experiments that explore such topics as how sounds form and travel; properties of standing waves and harmonics; and aspects of string, wind, and percussion instruments. He adroitly balances open-ended questions and necessary background information thus enticing students to actually investigate phenomena to obtain answers. Many of the 35 experiments offer intriguing ideas for elementary or middle school science fairs. The book will reward self-motivated students who are seeking challenges in problem solving.
  
  
• True Green Kids: 100 Things You Can Do to Save the Planet. Kim McKay and Jenny Bonnin. National Geographic , Washington, DC, 2008. 144 pp. $27.90. Paper, $10.85
  Youngsters who wish to join the green movement will enjoy this book. The 100 activities range from the obvious (use cloth bags, turn down your heat) to the creative and fun (set up a local carbon trading card system, help organize a trash-free lunch day at school). Each is described on a single page, which makes the book perfect for browsing. For those who want to do still more, the authors suggest ways to learn about jobs that will help our environment.
  
  
• The Ultimate Guide to Your Microscope. Shar Levine and Leslie Johnstone. Sterling, New York, 2008. 144 pp. Paper, $9.95
  Most students find their introduction to microscopes boring. They are shown a diagram of parts and given a couple exercises that demonstrate the instruments' capabilities. The authors offer a lively alternative. After covering the basics and how to make various types of slides, they describe 41 projects involving easy-to-obtain objects such as pet hair, dead bugs, food molds, and clover. Their instructions, discussions of what is likely to be seen, and color photomicrographs should inspire readers to explore the tiny facets of our world.

Modest candidates viewed as more likable but less competent

A new study in Psychology of Women Quarterly finds that women who present themselves as confident and ambitious in job interviews are viewed as highly competent but also lacking social skills. Women who present themselves as modest and cooperative, while well liked, are perceived as low on competence. By contrast, confident and ambitious male candidates are viewed as both competent and likable and therefore are more likely to be hired as a manager than either confident or modest women.

Julie E. Phelan, Corinne A. Moss-Racusin, and Laurie A. Rudman of Rutgers University taped both male and female applicants interviewing to be a computer lab manager. All applicants presented themselves as competent, but also as either confident and ambitious or modest and cooperative. Participants then evaluated the applicants' competence, social skills, and hirability.

Results show how disparate hiring criteria further discriminates against ambitious, competent women. When judging the ambitious women's hirability, a perceived lack of social skills formed the basis of the hiring decision, and the womens' high competence was relatively neglected. For ambitious men, however, perceived competence and interpersonal skills were weighed equally in the hiring decision. Women were doubly disadvantaged because even when female applicants adhered to stereotypic expectations by presenting themselves as modest, they were unlikely to be hired because evaluators emphasized their relatively low competence and discounted their (high) social skills.

According to this research, women who seek managerial roles face a double bind. In order to be viewed as sufficiently qualified for leadership, they must present themselves as confident and ambitious. But if they do so, they risk prejudice for acting "unfeminine," which can result in hiring discrimination. Thus, in performance settings where confidence and ambition are required to get ahead, men have a clear advantage.

Passenger reacts to traffic, unlike person at other end of cell conversation    
        
Drivers are far more distracted by talking on a cellular phone than by conversing with a passenger in an automobile, according to a new study by University of Utah psychologists Frank Drews, David Strayer and Monisha Pasupathi.

The study, which used a sophisticated driving simulator, found that when drivers talk on a cell phone, they drift out of their lanes and missed exits more frequently than drivers conversing with a passenger. The findings are being released Monday, Dec. 1 by the American Psychological Association and published in the Dec. 15, 2008, issue of the Journal of Experimental Psychology: Applied.

"The passenger adds a second set of eyes, and helps the driver navigate and reminds them where to go," says Strayer, a professor of psychology at the University of Utah and a co-author of the study. Previous studies by Strayer and Drews have found that hands-free cell phones are just as distracting as handheld models because the conversation is the biggest distraction. They also have shown that when young adults talk on cell phones while driving, their reaction times become as slow as reaction times for senior citizens, and that drivers talking on cell phones are as impaired as drivers with the 0.08 percent blood alcohol level that defines drunken driving in most states.

Strayer says he often is asked about the distraction caused by conversations with passengers versus people on the other end of a cell phone, "because in both cases you have a conversation." But "when you take a look at the data, it turns out that a driver conversing with a passenger is not as impaired a driver talking on a cell phone," he says. "You see bigger lane deviations for someone talking on a cell phone compared with a driver talking to a passenger. You also find when there is a passenger in the car, almost everyone takes the exit. But half the people talking on the cell phone fail to take the exit."

Drews concludes: "Friends don't talk to their driving friends on cell phones." Strayer adds: "The difference between a cell phone conversation and passenger conversation is due to the fact that the passenger is in the vehicle and knows what the traffic conditions are like, and they help the driver by reminding them of where to take an exit and pointing out hazards."