title: The concept of same.
authors.affiliation: Department of Psychology, Indiana University, Bloomington 47405.
authors.forename: L B
authors.initials: LB
authors.lastname: Smith
mesh_terms: D002648:Child; D002657:Child Development; D003210:Concept Formation; D004193:Discrimination Learning; D006801:Humans; D011340:Problem Solving; D011578:Psycholinguistics