title: Discrimination and recognition of weak stimuli. II. A possible autonomic feedback mechanism.
mesh_terms: D001341:Autonomic Nervous System / Q000502:physiology*; D003214:Conditioning, Classical; D005246:Feedback; D006801:Humans; D007858:Learning; D012018:Reflex; D014796:Visual Perception
keywords: AUTONOMIC NERVOUS SYSTEM/physiology; LEARNING; REFLEX, CONDITIONED; VISUAL PERCEPTION