Russian State University for the Humanities, Moscow, Russia; Institute of Ethnology and Anthropology, Russian Academy of Sciences, Moscow, Russia; National Research University Higher School of Economics, Moscow, Russia.
Institute of Ethnology and Anthropology, Russian Academy of Sciences, Moscow, Russia.
Early Hum Dev. 2019 Oct;137:104823. doi: 10.1016/j.earlhumdev.2019.07.006. Epub 2019 Jul 19.
Two recent meta-analyses have suggested the association between digit ratio (2D:4D) and aggression is weak. This conclusion has been criticised because the meta-analyses conflate forms of aggression that show strong sex differences with those that do not, and most studies have considered post-pubertal participants.
We test the influence of 2D:4D and ethnicity in the expression of aggression in children and adolescents in four ethnic groups of European and African origin.
Buss and Perry aggression questionnaire. Direct measurement of the 2nd and 4th digits.
1296 children and adolescents from Tanzania and Russia from 4 ethnic groups - Datoga, Meru, Russians, Tatars.
There were ethnic and gender differences in ratings on aggression with boys consistently reporting more physical aggression. In all four samples right 2D:4D was significantly lower in boys, compared to girls. With regard to our total sample of boys, the right 2D:4D was significantly and negatively associated with self-ratings on physical aggression, but no association was found for left 2D:4D. No associations between 2D:4D and physical aggression were found for girls. Hostility was negatively correlated with 2D:4D for boys, and anger was positively correlated with 2D:4D in girls.
Sex differences were strongest for right 2D:4D (boys<girls), and for physical aggression (boys>girls). Right 2D:4D was negatively related to physical aggression in boys only, suggesting possible relationship to prenatal androgenization.
最近的两项荟萃分析表明，手指长度比（2D:4D）与攻击性之间的关联较弱。这一结论受到了批评，因为荟萃分析将表现出强烈性别差异的攻击形式与那些没有表现出性别差异的攻击形式混为一谈，而且大多数研究都考虑了青春期后的参与者。
我们测试了 2D:4D 和种族在四个具有欧洲和非洲血统的族群的儿童和青少年的攻击性表达中的影响。
使用 Buss 和 Perry 攻击性问卷，直接测量第二和第四指的长度。
来自坦桑尼亚和俄罗斯的四个族群（Datoga、Meru、俄罗斯人和鞑靼人）的 1296 名儿童和青少年。
在攻击性评分方面存在种族和性别差异，男孩始终报告更多的身体攻击。在所有四个样本中，男孩的右手 2D:4D 明显低于女孩。就我们的男孩总样本而言，右手 2D:4D 与身体攻击的自我评分呈显著负相关，但左手 2D:4D 没有相关性。对于女孩，2D:4D 与身体攻击之间没有相关性。对于男孩，敌意与 2D:4D 呈负相关，而对于女孩，愤怒与 2D:4D 呈正相关。
右手 2D:4D（男孩<女孩）和身体攻击（男孩>女孩）的性别差异最大。只有男孩的右手 2D:4D 与身体攻击呈负相关，这表明可能与产前雄激素化有关。
