title: Instrumental heart rate responses and visual perception: a preliminary study.
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention; D003216:Conditioning, Operant; D004562:Electrocardiography; D004777:Environment; D005246:Feedback; D006339:Heart Rate; D006801:Humans; D008297:Male; D014796:Visual Perception