Social versus edible rewards as a function of intellectual level and socioeconomic class.
D002648:Child; D002675:Child, Preschool; D005260:Female; D005502:Food; D006801:Humans; D008607:Intellectual Disability; D007360:Intelligence; D008297:Male; D009048:Motor Skills; D012054:Reinforcement, Psychology; D012056:Reinforcement, Social; D012959:Socioeconomic Factors