People’s judgements about whether they are depressed depend on how they believe their own suffering “ranks” in relation to the suffering of friends and family and the wider world.

Worrying may have evolved along with intelligence as a beneficial trait.

Scientists at the Stanford University School of Medicine have shown for the first time how brain function differs in people who have math anxiety from those who don't.

GREEN BAY, Wis., Jan.

Approximately 3 percent of the U.S. population suffers from excessive, uncontrollable worry that reduces their health and quality of life.