When we consider the impact of parenting on children, we tend to think that the dramatic effects are going to appear at one end or the other of the parenting-quality spectrum. A child who is physically abused is going to fare far worse, we assume, than a child who is simply ignored or discouraged. And the child of a supermom who gets lots of extra tutoring and one-on-one support is going to do way better than an average well-loved child. But what Blair’s and Evans’s research suggests is that regular good parenting—being helpful and attentive during a game of Jenga—can make a profound
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