This document discusses various psychotherapies and behavioral therapies used to treat psychiatric disorders. It describes psychotherapy as deliberately establishing a relationship between therapist and patient to modify symptoms, behaviors, and promote growth. Approaches discussed include psychodynamic, cognitive-behavioral, humanistic, and behavioral therapies. Behavioral therapy aims to modify maladaptive behaviors through conditioning, using techniques like systematic desensitization, flooding, positive/negative reinforcement, and punishment. Cognitive behavioral therapy combines cognitive and behavioral techniques to change negative thoughts and behaviors. Exposure and response prevention is also discussed as a type of CBT used for anxiety disorders like OCD.