title: Research problems and concepts in the study of aging: assessment and behavior modification.
mesh_terms: D000368:Aged; D000375:Aging; D001519:Behavior; D001521:Behavior Therapy; D003213:Conditioning, Psychological; D005853:Geriatrics; D006801:Humans; D007858:Learning; D008875:Middle Aged; D010551:Personality; D010552:Personality Assessment; D011613:Psychotherapy; D012106:Research