title: Span of attention, backward masking, and reaction time.
mesh_terms: D001288:Attention / Q000502:physiology*; D006801:Humans; D010470:Perceptual Masking / Q000502:physiology*; D011601:Psychophysics; D011930:Reaction Time / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*