Galizzi Matteo M, Nieboer Jeroen
Behavioural Research Lab, Department of Social Policy, London School of Economics and Political Science London, UK.
Front Behav Neurosci. 2015 Feb 23;9:41. doi: 10.3389/fnbeh.2015.00041. eCollection 2015.
We look at the links between the Digit Ratio-the ratio of the length of the index finger to the length of the ring finger-for both right and left hands, and giving in a Dictator Game. Unlike previous studies with exclusively Caucasian subjects, we consider a large, ethnically diverse sample. Our main results are as follows. First, for Caucasian subjects we estimate a significant positive regression coefficient for the right hand digit ratio and a significant negative coefficient for its squared measure. These results replicate the findings of Brañas-Garza et al. (2013), who also observe an inverted U-shaped relationship for Caucasian subjects. Second, we are not able to find any significant association of the right hand digit ratio with giving in the Dictator Game for the other main ethnic groups in our sample, nor in the pooled sample. Third, we find no significant association between giving in the Dictator Game and the left hand digit ratio.
我们研究了右手和左手的食指与无名指长度之比（指比）之间的联系，以及在独裁者博弈中的给予行为。与之前仅针对白种人受试者的研究不同，我们考虑了一个规模大、种族多样的样本。我们的主要结果如下。首先，对于白种人受试者，我们估计右手指比的回归系数显著为正，其平方测量值的系数显著为负。这些结果重复了布拉尼亚斯 - 加萨等人（2013年）的发现，他们也观察到白种人受试者存在倒U形关系。其次，在我们样本中的其他主要种族群体以及合并样本中，我们未能发现右手指比与在独裁者博弈中的给予行为有任何显著关联。第三，我们发现独裁者博弈中的给予行为与左手指比之间没有显著关联。
