The first long-term study of its kind finds that bipolar disorder identified in children often persists into young adulthood and involves frequent, intense swings between manic euphoria and depression.

The family-shattering effects of a mother’s depression can prompt the same mood disorder in her children, independent of any genetic risk.

One-year olds can translate personal experience into knowledge about others

A common gene variation in men is linked to marital crises and less bonding in a study of more than 500 long-term couples.

Treatments shown to diminish psychological problems in traumatized youngsters often don’t get used, an exhaustive research review concludes.

A measure of unconscious attitudes predicts the opinions that undecided people eventually reach on a controversial issue.

Some magpies recognize themselves in mirrors, indicating that a basic form of self-recognition evolved in one family of birds.