Stress, activity, and proximity seeking: sex differences in the year-old child.
D001143:Arousal; D005239:Fear; D005260:Female; D006801:Humans; D007103:Immobilization; D007223:Infant; D008124:Locomotion; D008297:Male; D009034:Mother-Child Relations; D009043:Motor Activity; D011930:Reaction Time; D012737:Sex Factors; D013037:Spatial Behavior; D013315:Stress, Psychological