title: Cardiac orienting responses of 6- and 16-week-old infants.
mesh_terms: D000161:Acoustic Stimulation; D000367:Age Factors; D003214:Conditioning, Classical; D005260:Female; D006185:Habituation, Psychophysiologic; D006339:Heart Rate; D006801:Humans; D007223:Infant; D008297:Male; D009949:Orientation