A therapeutic approach based on the principle that maladaptive moods and behavior can be changed by replacing distorted or inappropriate ways of thinking with thought patterns that are healthier and more realistic.

Cognitive therapy is an approach to psychotherapy that uses thought patterns to change moods and behaviors. Pioneers in the development of cognitive behavior therapy include Albert Ellis (1929-), who developed rational-emotive therapy (RET) in the 1950s, and Aaron Beck (1921—), whose cognitive therapy has been widely used for depression and anxiety. Cognitive behavior therapy has become increasingly popular since the 1970s. Growing numbers of therapists have come to believe that their patients' cognitive processes play an important role in determining the effectiveness of treatment. Currently, almost 70% of the members of the Association for the Advancement of Behavior Therapy identify themselves as cognitive behaviorists.

Like behavior therapy, cognitive behavior therapy tends to be short-term...