5-HTTLPR、性别、家庭社会经济地位与面孔表情识别的关系

该研究采用531名中国汉族健康大学生为被试,综合考察了5-HTTLPR(5-羟色胺转运体基因连锁多态区)基因型、性别和家庭社会经济地位之间交互作用与面孔表情识别的关系。研究结果发现,性别和家庭社会经济地位在面孔表情识别上有显著的主效应。总体来说,家庭社会经济地位较高和女性的被试具有较好的面孔表情识别能力。5-HTTLPR基因型、性别、家庭社会经济地位,它们在面孔表情识别上的三因素交互作用也显著。该三因素交互作用主要是源于,在高家庭社会经济地位背景下,女性携带有5-HTTLPR长片段等位基因比短片段纯合子表现出稍差的面孔表情识别能力。该结果体现了基因与环境多因素交互作用对面孔表情识别能力的重要性。

Interaction Effects of 5-HTTLPR, Gender, and Family Socioeconomic Status on Facial Expression Recognition in Chinese College Students

A polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) has been implicated in recognition of facial emotions. Previous research has separately examined the effects of gender, 5-HTTLPR genotype, and family socioeconomic status (SES) on facial expression recognition (FER). The current study examined how these factors interacted in a large Chinese college students sample (N=531). Results showed significant main effects of gender and family SES on FER, favoring females and those from higher SES backgrounds. The three-way interaction among gender, family SES, and 5-HTTLPR was also significant, mainly because high-SES females with the long allele of 5-HTTLPR showed lower FER than s allele homozygous. These results are interpreted as a gene-environment interaction from an expanded contextualist perspective.