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There's a great discussion going on in the Fray about the varying IQs of older and younger siblings , featuring Norwegian study author Petter Kristensen and psychology writer Judith Rich Harris. Check it out . Read More...
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I wrote last summer about a Norwegian study on birth order that was being treated as definitive proof that first-born kids have higher IQs than their siblings--and that the IQ edge is due to social rank, not biology. (Actually, the results are about brothers Read More...
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