Genetic etiology of spelling deficits in
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J. C. Defries; Jim Stevenson; Jacquelyn J. Gillis; Sally J. Wadsworth
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Article
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1991
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Springer Netherlands
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English
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## AF#lRAcT: The basic multiple regression model for the analysis of selected twin data (DeFries and Fulker 1985, 1988) was fitted to spelling data from 100 pairs of MZ twins and 71 pairs of same-sex DZ twins tested in the Colorado Reading Project (DeFries, Olson, Pemrington and Smith 1991), and t