Comment on Munsinger's adoption study

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Abstract
The recent adoption study reported in this journal by Munsinger appears to provide clear and powerful evidence for a large genetic determination of IQ. The study has been cited as methodologically superior to all other adoption studies. With the repudiation of Burt's data, the Munsinger study has taken on particular importance. Perusal of the raw data published by Munsinger clearly establishes that serious errors have been made in the determination of socioeconomic status. The entire study depends on these erroneous data and must therefore be dismissed.