title: Pretraining retarded and intellectually average children for visual discrimination: nonreward vs. reward.
mesh_terms: D002648:Child; D002675:Child, Preschool; D003463:Cues; D004193:Discrimination Learning; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability; D007360:Intelligence; D012054:Reinforcement, Psychology; D013997:Time Factors; D014796:Visual Perception