title: Heart rate and respiratory responses as a function of task difficulty: the use of discriminant analysis in the selection of psychologically sensitive physiological responses.
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology; D005260:Female; D006339:Heart Rate; D006801:Humans; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology*; D012119:Respiration; D013223:Statistics as Topic