title: Discriminations among perceptual and symbolic stimuli.
mesh_terms: D000293:Adolescent; D000328:Adult; D004193:Discrimination Learning; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D010153:Paired-Associate Learning; D011930:Reaction Time; D012660:Semantics; D012858:Size Perception; D013561:Symbolism