title: Effects of rewarded pretraining and partial reinforcement on lever pulling by retarded and nonretarded children.
mesh_terms: D002648:Child; D002657:Child Development; D003216:Conditioning, Operant; D004193:Discrimination Learning; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D005639:Frustration; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D011214:Practice, Psychological; D011336:Probability; D011930:Reaction Time; D012055:Reinforcement Schedule; D012201:Reward; D014796:Visual Perception