Abstract
Achievement at school and performance on the Dominoes test, the Differential Aptitude Tests (DAT), and Griéger's Characterological Questionnaire of 45 monozygotic and 46 same-sex dizygotic pairs of twins were analyzed using a new linear model for familial correlation. For 14 of the 20 sets of data, the genotype's contribution to the total variance is estimated to be higher than 50%. The effect of common environment seems to be important only for achievement in Arts.
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Supported by the Câmara Especial de Pós-graduação e Pesquisa da Universidade Federal do Rio Grande do Sul, Conselho Nacional de Pesquisas, Coordenação do Aperfeiçoamento de Pessoal de Nível Superior, Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, and Grant GM17173 from the U.S.P.H. National Institutes of Health, PGL Paper No. 140.
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Salzano, F.M., Rao, D.C. Patha analysis of aptitude, personality, and achievement scores in Brazilian twins. Behav Genet 6, 461–466 (1976). https://doi.org/10.1007/BF01065702
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DOI: https://doi.org/10.1007/BF01065702