title: A clinician's approach to experimental research.
mesh_terms: D000293:Adolescent; D000328:Adult; D003863:Depression / Q000628:therapy*; D006801:Humans; D008875:Middle Aged; D011594:Psychometrics; D011613:Psychotherapy; D012063:Relaxation; D012107:Research Design; D011795:Surveys and Questionnaires