title: Discrimination at threshold: labelled detectors in human vision.
mesh_terms: D004192:Discrimination, Psychological; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D013028:Space Perception; D013998:Time Perception; D014792:Visual Acuity