Cognitive behavioral therapy (CBT) aims to change maladaptive thoughts and behaviors. Three major contributors are Aaron Beck, Albert Ellis, and Donald Meichenbaum. Ellis developed rational emotive behavioral therapy which teaches that emotions stem from beliefs and thinking patterns. Beck's cognitive therapy focuses on identifying and modifying negative schemas and cognitive distortions. Meichenbaum's cognitive behavior modification emphasizes self-statements and developing coping skills. Therapists use techniques like cognitive restructuring, behavioral experiments, and stress inoculation training.