Jacobs B S, Moss H A
Child Dev. 1976 Jun;47(2):315-22.
Mother-infant interaction was assessed on 32 first- and second-born siblings when each was 3 months old. Data were colleted during 2 6-hour naturalistic home observations using a modified time-sampling technique. The sample consisted of 4 equal-size subgroups of same and opposite sex sibling pairs. Results suggested that interaction between a mother and her infant varied depending on the birth order and gender of the infant. Mothers spent significantly less time in social, affectionate, and caretaking interaction (except for feeding activities) with their second borns than they had with their firstborns; this difference was greater if the second born was female. Certain patterns of maternal behaviors appeared to be stable from one sibling to the other. Different types of interaction between the mothers and their younger infants were related to attention-seeking behavior in the firstborn male and female siblings.
在32对头胎和二胎的兄弟姐妹3个月大时，对母婴互动进行了评估。数据是在两次为期6小时的自然主义家庭观察期间，使用改良的时间抽样技术收集的。样本由4个同等规模的同性和异性兄弟姐妹对亚组组成。结果表明，母亲与婴儿之间的互动因婴儿的出生顺序和性别而异。与头胎相比，母亲与二胎进行社交、亲昵和照顾互动（喂食活动除外）的时间明显减少；如果二胎是女孩，这种差异会更大。某些母亲行为模式在一个兄弟姐妹与另一个兄弟姐妹之间似乎是稳定的。母亲与年幼婴儿之间不同类型的互动与头胎男性和女性兄弟姐妹的寻求关注行为有关。
