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.

Original languageEnglish
Pages (from-to)461-466
Number of pages6
JournalBehavior genetics
Issue number4
StatePublished - Oct 1976


  • DAT tests
  • Dominoes test
  • Griéger's characterological test
  • path analysis
  • twins


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