Early language and nonverbal representation: a reassessment.
D002663:Child Language; D005260:Female; D006801:Humans; D007100:Imitative Behavior; D007223:Infant; D007804:Language Development; D008137:Longitudinal Studies; D008297:Male; D009034:Mother-Child Relations; D009633:Nonverbal Communication; D013061:Speech Acoustics