This document compares and contrasts cognitive therapy and interpersonal psychotherapy for treating depression. Cognitive therapy, developed by Albert Ellis and Aaron Beck, aims to identify and correct irrational or distorted thoughts that contribute to depression. Interpersonal psychotherapy, developed by Gerald Klerman, views depression as stemming from interpersonal issues and aims to improve social skills and relationships. Both therapies have been shown effective in treating depression, though some studies suggest interpersonal psychotherapy may be more effective for issues with an emotional component. The document discusses the key founders, techniques, and goals of cognitive therapy and interpersonal psychotherapy.