April 29, 2013 Psychologists have long known that children often model their behavior on the actions of parents or peers. But science has only recently begun to measure the influence of siblings. An older brother's or sister's behavior can be very contagious, it turns out — for good and for bad.
April 28, 2013 The U.S. has spent millions of dollars since the 1980s on anti-drug ads. But research shows that some of these older public service announcements might be counterproductive. Now that the ads are shifting to reach teens who want to rebel, new studies show they may actually be more effective.
April 26, 2013 Historians tell us that caffeine in coffee helped Western civilization "sober up" and get down to business. Now scientific research shows that at low doses, caffeine improves performance on mental tasks, especially in people who are already tired.
April 26, 2013 Scientists have deployed hundreds of tiny, experimental robots to help with biopsies. They're as small as a speck of dust. They look like tiny ninja throwing stars. And researchers use magnets to retrieve them.
April 26, 2013 OPBHow hard can it be to measure the health of a population? Oregon is finding out it's difficult to decide even what to track. But the state received almost $2 billion in federal funds to improve the health of its residents and to cut costs. The state faces substantial fines if it can't prove it has done the job.
April 26, 2013 An oversight committee halted a big clinical study of an experimental HIV vaccine after a peek at preliminary results showed there was no way the study would be able show the vaccine works. More vaccinated people became infected with HIV than those who got placebo shots.