Individual differences in waking time and some patterns of behaviour in infants.
D000367:Age Factors; D000704:Analysis of Variance; D002652:Child Behavior; D005149:Facial Expression; D006801:Humans; D007223:Infant; D009043:Motor Activity; D010553:Personality Development; D012951:Socialization; D013997:Time Factors; D014831:Voice; D014851:Wakefulness