title: In defence of a ratio model for movement detection at threshold.
mesh_terms: D000328:Adult; D005260:Female; D005366:Figural Aftereffect / Q000502:physiology; D006801:Humans; D008297:Male; D008959:Models, Neurological; D009039:Motion Perception / Q000502:physiology*; D009949:Orientation / Q000502:physiology