Change in stimulus conditions and the orienting response.
D001143:Arousal; D001307:Auditory Perception; D003071:Cognition; D003214:Conditioning, Classical; D005712:Galvanic Skin Response; D005795:Generalization, Stimulus; D006185:Habituation, Psychophysiologic; D006801:Humans; D007266:Inhibition, Psychological; D008568:Memory; D008959:Models, Neurological; D009949:Orientation; D010812:Physical Stimulation; D010991:Plethysmography; D014796:Visual Perception