title: Children's manipulation of illusory and ambiguous stimuli, discriminative performance, and implications for conceptual development.
mesh_terms: D000367:Age Factors; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003210:Concept Formation; D004193:Discrimination Learning; D004215:Distance Perception; D005260:Female; D006801:Humans; D007088:Illusions; D008029:Lighting; D008297:Male; D011340:Problem Solving; D012858:Size Perception