Behaviour genetics
To my knowledge and surprise, our attempts to find direct behaviour genetics data on information processing were not successful. True, behaviour genetics has studied variables like mental abilities and personality traits, and interpreted the outcomes to reflect inheritable differences in information processing. However, in those studies no direct processing indices were collected. The recent work of Lensvelt-Mulders (2000; Lensvelt-Mulders and Hettema, 2001) has changed this picture. Using the experimental design explained earlier she studied the reactions of 100 MZ and DZ twins to eight films and analysed scores on the three dimensions identified earlier with quantitative genetic analysis. As a result heritability estimates (h2) revealed values of 0.79 for arousal, 0.81 for effort and 0.82 for activation. Interestingly, the heritability estimates (h2) for the single variables were much lower ranging from 0.28 for GSL to 0.42 for SBP. Heritability estimates for the three dimensions are among the highest ever found for personality measures of individual differences. The heritability of information-processing energetics appears to be firmly established.
To my knowledge and surprise, our attempts to find direct behaviour genetics data on information processing were not successful. True, behaviour genetics has studied variables like mental abilities and personality traits, and interpreted the outcomes to reflect inheritable differences in information processing. However, in those studies no direct processing indices were collected. The recent work of Lensvelt-Mulders (2000; Lensvelt-Mulders and Hettema, 2001) has changed this picture. Using the experimental design explained earlier she studied the reactions of 100 MZ and DZ twins to eight films and analysed scores on the three dimensions identified earlier with quantitative genetic analysis. As a result heritability estimates (h2) revealed values of 0.79 for arousal, 0.81 for effort and 0.82 for activation. Interestingly, the heritability estimates (h2) for the single variables were much lower ranging from 0.28 for GSL to 0.42 for SBP. Heritability estimates for the three dimensions are among the highest ever found for personality measures of individual differences. The heritability of information-processing energetics appears to be firmly established.
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