A model proposed by Lukaszewski and Roney (2011) suggests that each individual's level of extraversion is calibrated to other traits that predict the success of an extraverted behavioural strategy. Under 'facultative calibration', extraversion is not directly heritable, but rather exhibits heritability through its calibration to directly heritable traits ("reactive heritability"). The current study uses biometrical modelling of 1659 identical and non-identical twins and their siblings to assess whether the genetic variation in extraversion is calibrated to variation in facial attractiveness, intelligence, height in men and body mass index (BMI) in women. Extraversion was significantly positively correlated with facial attractiveness in both males (r=.11) and females (r=.18), but correlations between extraversion and the other variables were not consistent with predictions. Further, twin modelling revealed that the genetic variation in facial attractiveness did not account for a substantial proportion of the variation in extraversion in either males (2.4%) or females (0.5%).

中文翻译：

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外倾的兼性校准/反应遗传力模型的测试。

Lukaszewski和Roney（2011）提出的模型表明，每个人的外向性水平均已根据预测性外向型行为策略成功的其他特征进行了校准。在“兼性校准”下，外向性不是直接可遗传的，而是通过对直接可遗传性状的校准来表现出遗传性（“反应性遗传性”）。当前的研究使用了1659个同卵双胞胎和异卵双胞胎及其兄弟姐妹的生物特征学模型来评估外向性的遗传变异是否已根据面部吸引力，智力，男性身高和女性体重指数（BMI）的变化进行了校准。男性（r = .11）和女性（r = .18）的外向性与面部吸引力显着正相关，但是外向性和其他变量之间的相关性与预测不一致。此外，双胞胎模型显示，面部吸引力的遗传变异在男性（2.4％）或女性（0.5％）中并未占外向性变异的很大比例。