Having a basic knowledge of scientific principles is no longer a luxury but, in today’s complex world, a necessity. And, according to a Michigan State University researcher, while Americans are holding their own, they are not even close to where they should be.

Participating at 3:45 p.m. PST today in an American Association for the Advancement of Science symposium, titled "Science Literacy and Pseudoscience," MSU’s Jon Miller said that Americans, while slightly ahead of their European counterparts when it comes to scientific knowledge, still have a long way to go.

"A slightly higher proportion of American adults qualify as scientifically literate than European or Japanese adults, but the truth is that no major industrial nation in the world today has a sufficient number of scientifically literate adults," he said. "We should take no pride in a finding that 70 percent of Americans cannot read and understand the science section of the New York Times." Approximately 28 percent of American adults currently qualify as scientifically literate, an increase from around 10 percent in the late 1980s and early 1990s, according to Miller’s research.

A professor in political science, Miller said one reason for the Americans’ slim lead is that the United States is the only major nation in the world that requires its college students to take general science courses. "Although university science faculties have often viewed general education requirements with disdain," he said, "analyses indicate that the courses promote civic scientific literacy among U.S. adults despite the disappointing performance of American high school students in international testing." Adding to the United States’ relatively good showing is Americans’ use of informal science education resources, such as science magazines, news magazines, science museums and the Internet.

Why is it important to have a population wise in the ways of science? Miller listed several reasons, including the need for a more sophisticated work force; a need for more scientifically literate consumers, especially when it comes to purchasing electronics; and, equally as important, a scientifically literate electorate who can help shape public policy.

"Over recent decades, the number of public policy controversies that require some scientific or technical knowledge for effective participation has been increasing," he said. "Any number of issues, including the siting of nuclear power plants, nuclear waste disposal facilities, and the use of embryonic stem cells in biomedical research point to the need for an informed citizenry in the formulation of public policy."

To be classified as "scientifically literate," Miller said one must be able to understand approximately 20 of 31 scientific concepts and terms similar to those that would be found in articles that appear in the New York Times weekly science section and in an episode of the PBS program "NOVA."

FDA approves study to evaluate an artificial retina intended to help subjects blinded by retinitis pigmentosa. Patients who have gone blind are a step closer to perhaps one day regaining some of their sight.

Researchers at the USC Doheny Eye Institute announced today the next step in their efforts to advance technology that hopefully will help patients with retinitis pigmentosa and macular degeneration regain some vision using an implanted artificial retina. The announcement by Mark Humayun, professor of ophthalmology at the Keck School of Medicine of USC and associate director of research at the Doheny Retina Institute, came at a press conference at the annual meeting of the American Association for the Advancement of Science in San Francisco.

The Food and Drug Administration recently approved an Investigational Device Exemption to conduct a clinical study of the new device – dubbed the Argus II Retinal Prosthesis System. The implantable technology is a collaborative effort between USC and Second Sight Medical Products, which manufactures the implant.

The Argus II is the second generation of an electronic retinal implant designed for the treatment of blindness due to retinitis pigmentosa, a group of inherited eye diseases that affect the retina. RP causes the degeneration of photoreceptor cells in the retina, which capture and process light, helping individuals to see. As these cells degenerate, patients experience progressive vision loss. The Argus device is essentially designed to take the place of the photoreceptors.

“The first phase of our implant work began in 2002,” Humayun said. “We have successfully implanted six patients in the trial, and we have found that the devices are indeed electrically conducting and can be used by patients to detect light or even to distinguish between objects such as a cup or plate.”

While the first generation of implants contained 16 electrodes laid out on an array, the Argus II is designed with 60 electrodes, which is intended to allow for higher-resolution images. The new device is also approximately one quarter the size of the original, reducing surgery and recovery times. The array is attached to the retina and used in conjunction with an external camera and video processing system to provide a rudimentary form of sight to implanted subjects.

The clinical trial of the first generation of implants continues at the Doheny Eye Institute at USC. All six previously blind patients in the first trial have been able to detect light, identify objects in their environment and even perceive motion after implantation with the first generation device.

The device ultimately may be used for the millions of people suffering from age-related macular degeneration, or AMD. In fact, Humayun said, there are 25 million people around the world, including 6 million in the United States, who have been blinded or are severely visually impaired due to diseases like RP and AMD. By 2020, that figure is expected to double, creating a virtual vision-loss epidemic. Both AMD and RP destroy vision by annihilating the retinal cells that allow light to be translated into recognizable images.

“Perhaps what we’re most excited about in this next study,” Humayun said, “is, similar to the first generation Second Sight device, we will be able to test the new device with patients at their homes, churches, schools and similar locations. The importance of this work is going to be reflected in how well this helps them regain some of their lost vision.”

The current study will include patients over 50 years of age who have RP or AMD and who have had previous functional vision.

This study is supported by the Department of Energy, the National Science Foundation, National Eye Institute/NIH, Research to Prevent Blindness, the W. M. Keck Foundation and the Albaugh Family Trust.

As a night of bad sleep can have an adverse effect on an adult’s performance at work the next day, an insufficient amount of rest can also have a negative impact on how well middle or high school students perform in the classroom. A study published in the February 15th issue of the Journal of Clinical Sleep Medicine (JCSM) finds that adolescents who experience sleep disturbances are more likely to receive bad grades in school.

James F. Pagel, MD, of the University of Colorado School of Medicine, examined the results of 238 school district-approved questionnaires, filled out by students attending middle school or high school, which included a high frequency of sleep complaints. According to the surveys, students with lower grade point averages (GPAs) were more likely to have restless, aching legs when trying to fall asleep, difficulty concentrating during the day, snoring every night, a hard time waking up in the morning, sleepiness during the day, and falling asleep in class.

"While a series of previously-conducted studies all found that adolescents reporting inadequate sleep, irregular sleep patterns, and/or poor sleep quality do not perform as well in school as students without sleep complaints, this study provides additional evidence indicating that sleep disturbances occur at high frequencies in adolescents and significantly affect daytime performance, as measured by GPA," said Pagel.

Both restless legs and difficulty concentrating during the day are symptoms associated with the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD), a diagnosis that can be associated with poor school performance. It is important for parents to discuss their teen’s sleep-related problem with a primary care physician, and to have their teen screened for ADHD if necessary, added Pagel.

Teens are advised to follow these recommendations to getting a good night’s sleep, which will help lead to better school performance:

• Get a full night’s sleep on a regular basis. Do not stay up all hours of the night to "cram" for an exam, do homework, etc. If extracurricular activities at school are proving to be too time-consuming, consider cutting back.
  
• If you are not asleep after 20 minutes, then get out of the bed and do something relaxing, such as reading a book or listening to music, until you are tired enough to go back to bed.
  
• Get up at the same time every morning.
  
• Avoid taking naps after school if you can. If you need to lie down, do not do so for more than an hour.
  
• Keep a regular schedule.
  
• Don’t read, write, eat, watch TV, talk on the phone or play cards in bed.
  
• Do not have any caffeine after lunch.
  
• Do not go to bed hungry, but don’t eat a big meal before bedtime either.
  
• Avoid any rigorous exercise within six hours of your bedtime.
  
• Try to get rid of or deal with things that make you worry.
  
• Make your bedroom quiet, dark and a little bit cool.

See also: Sleep well before learning something new, an article discussing how sleep deprivation can severely hamper the brain’s ability to learn.

The color of a drink can fool the taste buds into thinking it is sweeter

Does orange juice taste sweeter if it's a brighter orange? A new study in the March issue of the Journal of Consumer Research finds that the color of a drink can influence how we think it tastes. In fact, the researchers found that color was more of an influence on how taste was perceived than quality or price information.

"Perceptual discrimination is fundamental to rational choice in many product categories yet rarely examined in consumer research," write JoAndrea Hoegg (University of British Columbia) and Joseph W. Alba (University of Florida). "The present research investigates discrimination as it pertains to consumers' ability to identify difference—or the lack thereof—among gustatory stimuli."

Hoegg and Alba are the first to look at how individual attributes -- such as color, price, or brand -- can affect which products we prefer. The researchers manipulated orange juice by changing color (with food coloring), sweetness (with sugar), or by labeling the cups with brand and quality information. They found that though brand name influenced people's preferences for one cup of juice over another, labeling one cup a premium brand and the other an inexpensive store brand had no effect on perceptions of taste.

In contrast, the tint of the orange juice had a huge effect on the taster's perceptions of taste. As the authors put it: "Color dominated taste."

Given two cups of the same Tropicana orange juice, with one cup darkened with food coloring, the members of the researcher's sample group perceived differences in taste that did not exist. However, when given two cups of orange juice that were the same color, with one cup sweetened with sugar, the same people failed to perceive taste differences.

"It seems unlikely that our consumers deliberately eschewed taste for color as a basis for discrimination," write the authors. "Moreover, our consumers succumbed to the influence of color but were less influenced by the powerful lure of brand and price information."

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Hoegg, J. and J.W. Alba. "Taste Perception: More Than Meets the Tongue," Journal of Consumer Research: March 2007.

PHILADELPHIA (UPI) — A University of Pennsylvania psychologist says a number of studies have found negative psychological effects associated with adolescent acne.

David Sarwer, an associate professor at the Center for Human Appearance at the University of Pennsylvania School of Medicine in Philadelphia, said up to 50 percent of teenage acne sufferers also experience increased body image dissatisfaction, social anxiety, low self-esteem and symptoms of depression, USA Today reported Monday.

"Some become so upset they may think about or actually attempt suicide," Sarwer said.

Researchers say drugs and treatments developed in recent years offer new hope to sufferers of acne, which is caused when sebaceous glands in the skin create too much sebum oil, which can clog pores and mix with bacteria, causing inflammation.

Mild acne can be treated with over-the-counter medications containing benzoyl peroxide, salicylic acid and sulfur, but unresponsive outbreaks and acne characterized by larger cysts may require the prescription drug isotretinoin. The drug derived from vitamin A is an effective treatment, but scares away some consumers due to its extensive list of side effects, including liver changes and birth defects in pregnant women.

Copyright © 2007 by United Press International

A drug company was last week accused of concealing evidence about the safety of the antidepressant Seroxat. According to leading psychiatrist Professor David Healy, this is just the latest in a string of cases where patients and medical professionals have been misled about a drug's adverse effects. [read more]

Eastwood, J.D., Cavalierea, C., Fahlmana, S.A. and Eastwood, A.E. (2007). A desire for desires: Boredom and its relation to alexithymia. Personality and Individual Differences, 42(6), 1035-1045.

Abstract: Participants completed self-report scales of boredom, emotional awareness and external orientation. Structural equation modeling indicated that boredom, emotional awareness and external orientation are distinctly measurable but correlated – the bored individual is unaware of emotions and externally-oriented. Furthermore, although the bored person typically complains that the external world fails to engage them, the present findings suggest the underlying problem may be in the person’s inability to consciously access and understand their emotions. The present findings and accompanying literature review challenge the simplistic notion that boredom is never more than a trivial annoyance resulting from an under-stimulating environment.