title: Use of self-delivered reinforcement and group contingency management to increase productivity of severely retarded workers.
mesh_terms: D000328:Adult; D004526:Efficiency; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000534:rehabilitation*; D008297:Male; D008875:Middle Aged; D012050:Rehabilitation, Vocational / Q000379:methods*; D012054:Reinforcement, Psychology