title: Helplessness and hopelessness among the institutionalized aged: an experiment.
mesh_terms: D000368:Aged; D003863:Depression; D005260:Female; D006801:Humans; D008134:Long-Term Care / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D009735:Nursing Homes / Q000458:organization & administration*; D010349:Patient Compliance; D010358:Patient Participation; D011998:Recreation; D012931:Social Environment; D014481:United States