title: RELATION BETWEEN PERCEPTUAL AND CONCEPTUAL OPERATIONS: NUMERICAL DISTANCE AND VISUAL EXTENT.
mesh_terms: D003210:Concept Formation; D006801:Humans; D010465:Perception; D011603:Psychophysiology; D013028:Space Perception; D014796:Visual Perception
keywords: CONCEPT FORMATION; PERCEPTION; PSYCHOPHYSIOLOGY; SPACE PERCEPTION; VISUAL PERCEPTION