摘要
The effect of mother-infant skin-to-skin contact on infants鈥?developing social expectations for maternal behavior was investigated longitudinally over infants鈥?first 3 months. Infants with and without skin-to-skin contact engaged with their mothers in the Still Face Task at ages 1 week, 1 month, 2 months, and 3 months. Infants with skin-to-skin contact began responding to changes in their mothers鈥?behavior with their affect at 1 month; infants without skin-to-skin contact did so at 2 months. At 3 months, infants with skin-to-skin contact increased their non-distress vocalizations during the still face phase, suggesting social bidding to their mothers. Skin-to-skin contact accelerated infants鈥?social expectations for their mothers鈥?behavior and enhanced infants鈥?awareness of themselves as active agents in social interactions.