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."