著者
敷島 千鶴 平石 界 安藤 寿康
出版者
日本社会心理学会
雑誌
社会心理学研究 (ISSN:09161503)
巻号頁・発行日
vol.22, no.1, pp.48-57, 2006-08-25 (Released:2017-02-08)
被引用文献数
3

With the twin method, we tested the theory of general trust. Among data collected on 1,040 twins, data from 328 pairs of identical twins and 103 pairs of same-sex fraternal twins were analyzed to examine genetic and environmental influences on the general trust level. A univariate genetic analysis showed that genetic factors and nonshared environmental factors accounted for 36% and 64% of the phenotypic variance of general trust respectively, while shared environmental factors did not contribute to it. This supports the argument that the general trust level is set responding to individual social circumstances, not by familial circumstances. A substantial degree of correlation between general trust and extraversion suggested that high trusters were more extraverted, which could support the emancipation theory of trust. Finally, a multivariate genetic analysis demonstrated that there is no genetic factor contributing specifically to general trust. All the genetic factors were shared by general trust and other personality traits, i.e., hostility, positive emotions, warmth, and altruism. The results suggested that heritability of general trust observed with the univariate analysis was a "reactive heritability" from personality traits. The implication of the data from the evolutionary psychological viewpoint is discussed.

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ただ、二卵性双生児の遺伝的な共通点は本当に50%なのかの疑念がある。これを仮に25%とすると結果は全く異なってくる。(50%の妥当性を述べている類似の論文もあるが。 https://t.co/hEdhVWg1pl )
@NishikawaMasaru 慶應のふたごプロジェクトがいろいろな成果を出されていて https://t.co/Oux62TC4vW ,比較的近い対象のものとしては一般的信頼 https://t.co/hHBexa8xxp や権威主義的態度 https://t.co/AvL8PlxBSs の成果があるかと存じます

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