IQ: Overrated By Jonah Lehrer James J. Heckman, an economist at the University of Chicago, has recently demonstrated that, rather than boost intelligence, the Perry Preschool led to permanent improvements in various personality traits, such as self-control and grit. He argues that it’s time policy makers stop fixating on academic test scores and instead devote resources to improving these attributes. The Boston Globe Aug. 2, 2009
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