Behavioral effects of price changes in a token economy.
D000328:Adult; D001521:Behavior Therapy; D004467:Economics; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000628:therapy*; D008875:Middle Aged; D009042:Motivation; D012054:Reinforcement, Psychology; D012201:Reward; D012907:Smoking