title: Motivational orientation and the relative efficacy of self-monitored and externally imposed reinforcement systems in children.
mesh_terms: D002648:Child; D002652:Child Behavior; D002755:Choice Behavior; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation; D010551:Personality; D012055:Reinforcement Schedule; D012054:Reinforcement, Psychology; D012201:Reward; D012649:Self Concept