What the Experts Are Saying Now

The most recent research in child development. Among the findings: 4-year-olds lie once an hour.

By KAY HYMOWITZ
For more than a century American parents—ever more distanced from grandmothers and ­suspicious of tradition—have looked to social ­science to explain their children to them. Thus they have gobbled up books and articles by experts who ­periodically deliver the latest truths about ­child-rearing. Back in 1945, when Dr. Spock published his "Baby and Child Care," readers' devotion to expert opinion was so intense that he began his book with the reassuring words: "Trust yourself." Not that he ­believed it. The book was jammed with advice.

Now, in "NurtureShock," Po Bronson and Ashley Merryman survey the newest new findings about child development. Little in the book is all that shocking, but given our enthusiasm for turning tentative child ­research into settled policy, the studies that the ­authors discuss are of more than passing interest.

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