Where you cast your ballot can affect how you cast your ballot.

Boys who attend preschool classes with a majority of girls do better developmentally than other boys.

A new study shows that playful 2-year-old chimpanzees may be particularly vulnerable to infectious diseases — some caught from humans.

New studies indicate that abused and neglected kids benefit from living with relatives and from high-quality foster care services.

In a step toward someday making brain-controlled prosthetic arms for people, scientists have trained monkeys to control a robotic arm with their thoughts. Click on the image to read the story and see the video.

Cigarette smokers who know one another tend to kick the habit all at once, highlighting the importance of social forces in smoking-cessation treatment.

Former child soldiers in Africa often adjust well to community life if they receive group rehabilitation and community acceptance, studies indicate