title: The additive composition of classes: the role of perceptual cues.
mesh_terms: D001307:Auditory Perception; D002648:Child; D002657:Child Development; D003071:Cognition; D003210:Concept Formation; D003463:Cues; D005556:Form Perception; D006801:Humans; D011340:Problem Solving; D011582:Psychological Theory