Adults facing the child-rearing experience can take a cue from the Freedman study. Suppose a couple wants to impress upon their daughter that lying is wrong. A strong, clear threat (“It’s bad to lie, honey; so if I catch you at it, I’ll cut your tongue out”) might well be effective when the parents are present or when the girl thinks she can be discovered. But it will not achieve the larger goal of convincing her that she does not want to lie because she thinks it’s wrong. To do that, a much subtler approach is required.

