Dunn J F, Plomin R, Daniels D
Child Dev. 1986 Apr;57(2):348-56. doi: 10.1111/j.1467-8624.1986.tb00034.x.
Siblings differ markedly in behavioral development, and it has been suggested that differential maternal treatment may contribute significantly to these differences. The question of how consistently mothers treat their different children was examined in a study of 45 sibling pairs from the Colorado Adoption Project, in which each child at 24 months of age was videotaped at home with the mother. The results showed mothers to be consistent in affection and verbal responsiveness but to differ in their controlling behavior toward the 2 siblings. Comparison of the same mother's behavior to the 2 siblings at 12 months and at 24 months showed little stability in maternal behavior to the same child over this age period.
兄弟姐妹在行为发展上存在显著差异，有人认为母亲的差别对待可能是造成这些差异的重要原因。在一项针对科罗拉多收养项目中45对兄弟姐妹的研究中，探讨了母亲对待不同孩子的一致性问题。研究中，每个24个月大的孩子都与母亲在家中被录像。结果显示，母亲在表达爱意和言语回应方面具有一致性，但在对两个孩子的控制行为上存在差异。对同一位母亲在孩子12个月和24个月时对两个孩子的行为进行比较，结果表明在这个年龄段，母亲对同一个孩子的行为几乎没有稳定性。
