title: A MULTIPLE-CHOICE VISUAL DISCRIMINATION APPARATUS.
mesh_terms: D001296:Audiovisual Aids; D002755:Choice Behavior; D004193:Discrimination Learning; D004864:Equipment and Supplies; D006801:Humans; D011589:Psychology, Experimental; D012106:Research; D014796:Visual Perception
keywords: AUDIO-VISUAL AIDS; DISCRIMINATION LEARNING; EQUIPMENT AND SUPPLIES; EXPERIMENTAL LAB STUDY; PSYCHOLOGY, EXPERIMENTAL; VISUAL PERCEPTION