Cognitive behavior therapy and interpersonal therapy have both shown efficacy in treating major depressive disorder among adolescents and emerging adults. Cognitive behavior therapy focuses on identifying and changing maladaptive thoughts and behaviors, while interpersonal therapy examines interpersonal relationships and communication styles. Research has found that both therapies effectively reduce depressive symptoms, though cognitive behavior therapy may be more effective for severe depression. Overall, cognitive behavior therapy and interpersonal therapy provide clients with skills to aid them post-treatment.