后叶催产素被证实可以让人们变得更加善于交际
你人有多nice可能是受单个基因的改变所影响的。而且别人可以很轻易地分辨出你有没有这个基因，即使你一句话也没说。
这个基因有很多突变体，可以用来编码后叶催产素受体。自从后叶催产素被证实可以让人们变得更加善于交际以来，来自加拿大多伦多大学的Aleksandr Kogan和他的同事们就一直想要弄清基因的这些变异是否可以影响人们的行为。
Kogan的团队让116个志愿者观看了23部20秒长的无声录像。录像内容都是每个人对于其同伴向其讲述自己悲惨遭遇时的反应。志愿者们被要求对所有录像中人的善良度和可信任度做个排名。
结果证明，拥有所谓GG型的后叶催产素受体基因的人被认为比GA和AA基因型的人更加nice。那么，区别在哪里呢？这些有GG基因型的人在聆听同伴的遭遇时，更多的是用非语言的姿态来反应，比如说，微笑或者点头。Kogan觉得正是这些行为影响了志愿者们的判断。
不同基因型对后叶催产素水平的影响机制还有待进一步研究。（生物探索译）
相关英文论文摘要：
Thin-slicing study of the oxytocin receptor (OXTR) gene and the evaluation and expression of the prosocial disposition
Individuals who are homozygous for the G allele of the rs53576 SNP of the oxytocin receptor (OXTR) gene tend to be more prosocial than carriers of the A allele. However, little is known about how these differences manifest behaviorally and whether they are readily detectable by outside observers, both critical questions in theoretical accounts of prosociality. In the present study, we used thin-slicing methodology to test the hypotheses that (i) individual differences in rs53576 genotype predict how prosocial observers judge target individuals to be on the basis of brief observations of behavior, and (ii) that variation in targets’ nonverbal displays of affiliative cues would account for these judgment differences. In line with predictions, we found that individuals homozygous for the G allele were judged to be more prosocial than carriers of the A allele. These differences were completely accounted for by variations in the expression of affiliative cues. Thus, individual differences in rs53576 are associated with behavioral manifestations of prosociality, which ultimately guide the judgments others make about the individual.
英文论文链接：https://www.pnas.org/content/early/2011/11/08/1112658108.abstract
