This document discusses cognitive behavioral theory and its history. It covers the following key points:
1. Cognitive behavioral therapy (CBT) examines the connection between thoughts, emotions and behaviors. It was pioneered by psychologists like Albert Ellis and Aaron Beck in the 1950s-1960s who realized that thoughts and beliefs influence emotions.
2. Ellis developed Rational Emotive Behavior Therapy which found that irrational beliefs can lead to negative emotions. Beck developed cognitive therapy for depression which found that negative self-assessments can cause depression.
3. Other contributors include Albert Bandura who found cognition is shaped by observation and experience, and Ivan Pavlov who discovered classical conditioning through his dog experiments.