title: Backward masking: stimulus energy and positional uncertainity.
mesh_terms: D001288:Attention; D004192:Discrimination, Psychological; D005260:Female; D005403:Fixation, Ocular; D005556:Form Perception; D006801:Humans; D007257:Information Theory; D008266:Macula Lutea / Q000502:physiology; D008297:Male; D008570:Memory, Short-Term; D009949:Orientation; D010470:Perceptual Masking; D014785:Vision, Ocular