A tiger walks the same worn groove along the edge of its exhibit like a broken record. A parrot methodically plucks out its ...

A new three-volume study, Abnormal Psychology Across the Ages, shows how far we have come in diagnosing and treating mental illness. In the Renaissance, the mentally ill were feared, shunned, and ...

Many people seem to think calling a dog good, bad, happy, sad, aggressive, stubborn, bold, shy, vicious, alpha, pessimistic, optimistic, or abnormal can help us understand what they’re thinking and ...