Aspects of our personality can be revealed in a heartbeat, literally.

Highly sociable tots, along with emotionally stable ones, were more likely than their peers to drink alcohol as teens.

The same tricks that work for Olympians can also lead to everyday success.

A new study of an isolated Bolivian society shows the "Big Five" might not be as comprehensive as previously thought.

Life regrets are tied to depression in older adults.

Researchers find that personality traits occur in clusters.

People are tolerant of even their worst personality traits in others.

Environmental stressors can turn on cells' genes when they're supposed to be off.

Why does marriage at a young age bother us so much in Western culture?