title: Age and sex discriminations in five- and six-month-old infants.
mesh_terms: D000328:Adult; D000367:Age Factors; D001244:Association; D001307:Auditory Perception; D002657:Child Development; D004192:Discrimination, Psychological; D005106:Exploratory Behavior; D005145:Face; D005260:Female; D005403:Fixation, Ocular; D006166:Guatemala; D006185:Habituation, Psychophysiologic; D006801:Humans; D007223:Infant; D008297:Male; D012737:Sex Factors; D013997:Time Factors; D014796:Visual Perception; D014831:Voice