title: The reaction of monkeys to 'fearsome' pictures.
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D001288:Attention; D001307:Auditory Perception; D001362:Avoidance Learning; D001522:Behavior, Animal; D003216:Conditioning, Operant; D005239:Fear; D008251:Macaca; D008297:Male; D008960:Models, Psychological; D009622:Noise; D013997:Time Factors; D014743:Videotape Recording; D014796:Visual Perception