This document provides an overview of different psychological therapies and how they have been used to treat psychological disorders. It discusses two modern approaches: psychotherapy, which is based on psychological theories and techniques, and biomedical therapy, which uses medical interventions. Specific therapeutic approaches covered include psychoanalysis, cognitive-behavioral therapy, behavioral therapy using classical and operant conditioning, humanistic therapies like person-centered and Gestalt therapy, and group therapies. Effectiveness of different therapies and factors influencing outcomes are also addressed.