Most studies of parenting on which this advice is based are useless. They're useless because they don't control for heritability. They measure some correlation between what the parents do, how the children turn out and assume a causal relation: that the parenting shaped the child.
这条建议所基于的关于养育子女的研究中的大部分 都是毫无用处的。它们没用是因为它们没有控制 遗传性。它们衡量了父母做什么 与子女变得如何之间的一些相关性， 并假定一个因果关系： 即父母的养育塑造了子女。