title: Judgment and imaging aspects of operations: a Piagetian study with Korean and Costa Rican children.
mesh_terms: D002648:Child; D002657:Child Development; D003210:Concept Formation; D003364:Costa Rica; D003431:Cross-Cultural Comparison; D004193:Discrimination Learning; D005006:Ethnicity / Q000523:psychology*; D005260:Female; D006801:Humans; D007092:Imagination; D007600:Judgment; D007723:Korea; D008297:Male; D011340:Problem Solving; D012424:Rural Population; D014505:Urban Population; D014796:Visual Perception