Skeptical Reporter for October 26th, 2012

Sadly, the skeptics community has lost two great personalities this week. Leon Jaroff, a science writer and editor who persuaded Time Inc. to start Discover magazine in 1980, became its top editor and for many years wrote the popular Skeptical Eye column challenging pseudosciences, died Saturday at his home in East Hampton, New York. He was 85. Mr. Jaroff was managing editor of Discover, a monthly, for four years, overseeing cover articles on the search for life in space, the evolution of sex and the secrets of the brain, among other topics. Also, the Center for Inquiry marks with great sadness the passing of Paul Kurtz, founder and longtime chair of the Committee for Skeptical Inquiry, the Council for Secular Humanism, and the Center for Inquiry, who died at the age of 86. A philosopher, activist, and author, Kurtz was for a half-century among the most significant and impactful figures in the humanist and skeptic movements.

For many women, premenstrual syndrome, or PMS, is a familiar preamble to their monthly cycle. But a new review of the data suggests that mood changes aren’t as closely tied to menses as many have assumed. A team led by Dr. Sarah Romans of the University of Otago in New Zealand reviewed 47 studies that followed women’s moods across the menstrual cycle. Only 15% of the studies found that women tended to have “classic” PMS: moods that worsened as the menstrual period approached and lifted when menstruation occurred. An additional 38% found PMS that lasted into menstruation or another cycle phase. However, a further 38% of the studies found no association between mood and any particular phase of the cycle. And 9% found that the worst moods actually occurred outside of the premenstrual phase. That means that little more than half of the studies (53%) found any link between menstruation and bad mood, and 85% didn’t find classic PMS. “The major finding of this review was that clear evidence for a specific premenstrual-phase-related mood occurring in the general population is lacking”, the authors concluded.

Why some people respond to treatments that have no active ingredients in them may be down to their genes, a study in the journal PLoS ONE suggests. The so-called "placebo effect" was examined in 104 patients with irritable bowel syndrome (IBS) in the US. Those with a particular version of the COMT gene saw an improvement in their health after placebo acupuncture. The scientists warn that while they hope their findings will be seen in other conditions, more work is needed. Edzard Ernst, a professor of complementary medicine at the University of Exeter, said: "This is a fascinating but very preliminary result. It could solve the age-old question of why some individuals respond to placebo, while others do not. And if so, it could impact importantly on clinical practice. But we should be cautious - the study was small, we need independent replications, and we need to know whether the phenomenon applies just to IBS or to all diseases." The placebo effect is when a patient experiences an improvement in their condition while undergoing an inert treatment such as taking a sugar pill or, in this case, placebo acupuncture, where the patient believes they are receiving acupuncture but a sham device prevents the needles going into their body.

Eating a raw food diet is a recipe for disaster if you're trying to boost your species' brainpower. That's because humans would have to spend more than 9 hours a day eating to get enough energy from unprocessed raw food alone to support our large brains, according to a new study that calculates the energetic costs of growing a bigger brain or body in primates. But our ancestors managed to get enough energy to grow brains that have three times as many neurons as those in apes such as gorillas, chimpanzees, and orangutans. How did they do it? They got cooking, according to a study published online today in the Proceed...