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...greater than researchers first thought. In a November 2008 study, a team of scientists used a new positron emission tomography (PET) brain-imaging technique developed by Drs. William Klunk and Chester Mathis of the University of Pittsburgh to image the brains of live patients - a leap forward in a field that long had to rely on postmortem analyses of brain tissue to confirm diagnoses after the fact - and showed that some 21% of patients with physical signs of dementia suffered no outward symptoms of cognitive impairment. (See how to prevent illness...
...decade mark was observed last month in Philadelphia by the First World Congress on Positive Psychology, where it was clear that the field is flourishing, to use a favorite word of positive psychologists. Planners had hoped for 800 attendees and got twice that number, with psychologists, educators and students from more than 50 countries descending upon the City of Brotherly Love. There were signs that findings by positive psychology researchers had begun to influence economics, education and even government policy in some countries. But it was also clear that some of the heady findings from the infancy of the field...
Studies like Cohen's help ground a young and sometimes fluffy field in hard science, says conference chairman Chris Peterson of the University of Michigan. "It's very, very careful, creative research," he says, while conceding, "There's a temptation to bullshit in positive psychology...
...There are unhappy lottery winners, but generally if a poor person wins the lottery, they are a little happier with their life," noted Diener, who is known as "Dr. Happiness" for his foundational work in the field and who holds the aptly named Smiley chair in psychology at the University of Illinois. As for paraplegics, "there is a big drop for those who became 100% disabled, meaning they can no longer do any work." In general, Diener noted, people do adapt to a major life change but not completely. "We have to be careful when we cite these studies," warned...
Researchers at Newcastle University in England report they have coaxed the first human sperm cells from embryonic stem cells, in a remarkable demonstration of how quickly the field of stem-cell science is moving...