面孔加工中性别和表情交互作用的研究

本研究采用"识别-判断"的实验范式考察面部表情识别和性别识别的反应时和正确率,使用2(任务:表情判断、性别判断)×2(图片表情:积极表情、消极表情)×2(图片人物性别:男性、女性)的被试内实验设计,以反应时和正确率为因变量,探讨人脸图片中性别和表情效价信息加工的交互影响。研究发现:个体对积极表情的识别速度和准确率都好于消极表情;研究中出现了同性别偏向现象,女性被试对女性面孔的加工速度更快;面孔表情和面孔性别加工间存在交互作用,表情加工对性别加工产生了影响,未发现性别加工对表情加工的影响。     

男性与女性对不同性别和种族面孔识别的差异

研究以大学生为被试,采用延时匹配任务,旨在探讨性别和种族因素对面孔识别的影响,结果发现:(1)男、女被试对女性面孔识别的反应时及正确率均优于男性面孔;(2)被试对不同种族女性面孔识别的优势存在差异,被试对高加索女性面孔的识别表现为更高的正确率,而对中国女性面孔的识别表现为更快的识别速度;(3)面孔种族是导致女性面孔识别优势的重要影响因素。研究表明,面孔识别受到面孔种族、面孔性别和被试性别共同作用的影响。     

面孔的表情优先于性别信息加工：来自直接比较的证据

为了探讨面孔知觉时表情或性别信息加工优先性的问题,要求被试对不同时长窗口中呈现的一系列面孔刺激的性别或者表情做出判断。两类任务的排列设置分为完全随机（实验一、二）和随机区组（实验三）。结果一致发现在面孔刺激呈现时间为12ms和50ms时,面孔表情信息识别比面孔性别信息识别更准确。由此推论,面孔知觉中面孔表情信息加工优先于面孔性别信息加工。     

亲缘线索影响择偶复制性别差异的实验研究

本研究通过一个实验,考查自我相似面孔这一亲缘线索对择偶复制的影响,结果,面孔自我相似水平与被试性别交互作用显著。对交互作用进行简单效应检验,结果,对男性被试而言,面孔自我相似水平差异显著,男性被试在自我相似面孔条件下表现出更多的择偶复制。对女性被试而言,面孔自我相似水平差异不显著。对上述性别差异进行了讨论,并对"性印刻"理论所解释的现象提出了另外的解释视角。     

面孔性别辨认中返回抑制效应的性别差异

采用线索-靶子实验范式, 要求被试完成面孔性别辨认任务, 从注意定向方面探讨面孔性别靶刺激返回抑制效应的性别差异。结果显示有效线索位置上面孔性别靶刺激的反应时均显著长于无效线索位置上的面孔性别靶刺激的反应时, 即表现出明显的返回抑制效应。进一步分析显示, 男性被试对同性和异性面孔靶刺激的返回抑制量无显著差异, 表明男性对面孔刺激的返回抑制不受面孔性别的影响; 而卵泡期女性对异性面孔靶刺激的返回抑制量显著小于黄体期女性, 表明女性对面孔靶刺激的返回抑制量与面孔性别和生理周期的交互作用有关。这些结果再一次为返回抑制的盲目机制提供了部分实验证据, 同时我们推测面孔性别对返回抑制的影响可能依赖于观察者对性信息的敏感性。     

词—面孔任务中的情绪效价冲突效应及性别差异

从中国情绪面孔系统和现代汉语情感词系统中分别选取两种情绪效价的表情面孔(愉快、悲伤)和情绪词(积极、消极),运用词—面孔范式,以60名大学生为被试,探讨了情绪效价冲突效应及性别差异。结果表明:(1)面孔的情绪类型主效应显著,悲伤面孔反应时长于愉快面孔;(2)词和面孔的情绪效价冲突性主效应显著,情绪效价一致条件下的反应时短于情绪效价不一致条件的反应时;(3)表情面孔的情绪类型、词和面孔情绪效价的冲突性、被试性别三者的交互作用显著,简单效应分析表明女性在词和面孔情绪效价不一致条件下对悲伤表情的判别反应时短于男性。     

面孔的表情信息优先于性别信息加工:来自直接比较的证据

为了探讨面孔知觉时表情或性别信息加工优先性的问题,要求被试对不同时长窗口中呈现的一系列面孔刺激的性别或者表情做出判断。两类任务的排列设置分为完全随机(实验1、2)和随机区组(实验3)。结果一致发现在面孔刺激呈现时间为12ms和50ms时,面孔表情信息识别比面孔性别信息识别更准确。由此推论,面孔知觉中面孔表情信息加工优先于面孔性别信息加工。     

基于面部特征的性别识别

本研究包括两个实验。实验一运用心理物理学的调整法,系统地改变黑白人脸图片的像素比,测定被试正确判断人脸性别的像素比例阈限。结果显示,个体在图片只呈现全部像素40.78%的情况下,性别判断的正确率即达到95%。实验二采用将人脸分区的方法,研究不同的面部区域在面孔的性别识别中的作用。结果显示:一、分区的主效应1极其显著,嘴部区域对性别识别的贡献最小;二、图片性别与分区的交互作用极其显著;三、图片人物性别和被试性别对判断的正确率有显著影响,女性被试正确率显著高于男性,男性人物图片识别率显著高于女性。     

五官完整度对自闭症儿童面孔表情性别识别的影响

摘 要 为探讨自闭症儿童在不同面孔遮蔽部位和不同面孔表情下的性别识别能力,本研究选取自闭症、智力障碍和普通儿童各21名对240张面孔表情图片进行性别识别。结果发现,自闭症儿童的性别识别正确率显著低于普通儿童,且表现出对中性和高兴表情的识别优于生气表情,同时在遮蔽眼睛时正确率最低。研究认为,自闭症儿童的总体性别识别能力偏低,且受面孔遮蔽部位和表情类型的影响显著,在面孔表情加工过程中体现出较为明显的局部加工特征。     

分视野范式呈现的情绪性面孔的加工

研究采用36名被试(女20名,男16名),采用4种变化强度(5%、10%、20%、30%)的5种情绪面孔(愉快、惊讶、悲伤、厌恶、愤怒),记录被试对左右视野呈现的中性面孔和情绪面孔识别的正确率,考察情绪效价单侧化效应的性别差异。结果发现:积极情绪面孔比消极情绪面孔的识别正确率更高;表情强度高的面孔识别正确率高于表情强度低的面孔;女性被试对左视野出现的消极情绪面孔识别正确率高于右视野出现的消极情绪面孔,相反,对右视野出现的积极情绪面孔识别正确率更高。说明在女性被试上出现了效价单侧化效应。     

5-HTTLPR X Stress in Adolescent Depression: Moderation by MAOA and Gender

Depression surges in adolescence, especially among girls. Most evidence indicates that the short allele of a polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) interacts with stress to influence the onset of depression. This effect appears to be less robust in adolescents, particularly among boys, and may be moderated by other genetic polymorphisms. Seeking to explain the adolescent gender difference in depression, this study examined the effects of 5-HTTLPR (rs25531), the monoamine oxidase A-upstream variable number tandem repeat (MAOA-uVNTR), and negative life events (NLE). A community-based longitudinal sample of 309 adolescents reported depressive symptoms and NLE at ages 11, 13, and 15. 5-HTTLPR and MAOA-uVNTR genotypes were ascertained via buccal swabs. A significant four-way interaction of 5-HTTLPR, MAOA-uVNTR, NLE at age 13, and gender predicted depressive symptoms at age 15. Girls were most likely to exhibit elevated depressive symptoms when experiencing NLE if they possessed low-expression MAOA-uVNTR alleles and short 5-HTTLPR alleles, whereas low-expression MAOA-uVNTR alleles but long 5-HTTLPR alleles were implicated in boys. The results indicate that the commonly reported 5-HTTLPR by stress interaction for depression may be limited to individuals with low-expression MAOA-uVNTR alleles. These data also provide new evidence that the short allele of 5-HTTLPR confers susceptibility to stress differently for females compared with males.     

Self‐Reported Family Socioeconomic Status,the 5‐HTTLPR Genotype,and Delinquent Behavior in a Community‐Based Adolescent Population

Twin and adoption studies have demonstrated a significant contribution of both genetic and environmental factors to antisocial and delinquent behavior. Associations have been reported between the serotonin transporter (5‐HTT) and aggression, and between socioeconomic status (SES), aggression, and serotonergic functions of the brain. We aimed to investigate associations between the 5‐HTTLPR genotype and family SES in relation to delinquent behavior among adolescents. A total of 1,467 17‐ to 18‐year‐old students in the county of Västmanland, Sweden, anonymously completed a questionnaire and gave a saliva sample. Family SES had a U‐shaped relation to delinquency, where adolescents with low and high family SES were the most delinquent. There were curvilinear interactions between the 5‐HTTLPR genotype and family SES in relation to delinquency. Among individuals having high family SES, boys with the LL (homozygous for the long allele) or LS (heterozygous) genotypes and girls with the SS (homozygous for the short allele) or LS (heterozygous) genotypes showed the highest delinquency scores. Among individuals having low family SES, boys with the LL (homozygous for the long allele) genotype and girls with the LS (heterozygous) genotype showed the highest delinquency scores. The present study suggests evidence for an interaction between family SES and the 5‐HTTLPR genotype in relation to juvenile delinquency. Aggr. Behav. 39:52‐63, 2013. © 2012 Wiley Periodicals, Inc.     

5-HTTLPR与抑郁相关性的研究动态

摘 要 5-HTTLPR是5-羟色胺转运蛋白基因启动子区域上的多态性位点,对其转录效率具有调节作用。5-HTTLPR基因型与抑郁存在相关,但必须把二者的关系置于一个多基因与环境交互作用的框架下考察。一方面,环境因素的作用不容忽视：S等位基因携带者暴露于负性生活事件时,表现出更多情绪问题,更易发生抑郁。另一方面,CYP2C9、BDNF等基因与5-HTTLPR有交互作用,共同影响抑郁的发生。此外,年龄、性别等因素会对研究结果造成混淆。未来研究应侧重于对机制的探讨。     

The serotonin transporter promoter polymorphism and childhood positive and negative emotionality

Association studies of the serotonin transporter promoter polymorphism (5-HTTLPR) and negative emotionality (NE) are inconclusive. However, emerging evidence suggests that the association between this polymorphism and NE may be influenced by levels of another temperament trait, positive emotionality (PE). Therefore, this study examined whether the association between the 5-HTTLPR and NE was moderated by PE. A community sample of 413 three-year-old children completed a standardized battery of laboratory tasks designed to tap temperamental emotionality. Children were also genotyped for the 5-HTTLPR. No direct association between 5-HTTLPR genotype and NE was found. However, the interaction of child PE and NE predicted 5-HTTLPR genotype. Furthermore, children with a short allele who were also low in PE had significantly greater NE than children without a short allele or children with high PE. Our findings suggest that the short allele of the 5-HTTLPR is associated with NE only in the context of low PE. Inconsistent links between NE and this gene in previous research may stem from the failure to consider other temperament traits that moderate associations.     

Dispositional optimism and physical wellbeing: The relevance of culture,gender, and socioeconomic status

The present study examined the relationship between dispositional optimism and physical wellbeing (as reflected in physical symptom reporting) in two groups of American and Jordanian college students. It also assessed moderation effects of culture, gender, and socioeconomic status (SES). Participants were administered a questionnaire consisting of items pertaining to dispositional optimism (as measured by the Revised Life Orientation Test, LOT‐R) along with items assessing physical symptom reporting and sociodemographic factors (e.g., gender, socioeconomic status). The results revealed significant negative correlations between dispositional optimism and physical symptom reporting for both American and Jordanian participants, although the magnitude of the correlation for the American group was noticeably larger than that for the Jordanian group. The results also showed that women, especially Jordanians, were more likely than men to report physical symptoms. Among Jordanians, physical symptom reporting was more common among those of lower SES. No statistically significant differences in physical symptom reporting were found between American men and women or between the two cultural groups. Multiple regression analyses revealed no statistically significant interactions between optimism and cultural background, optimism and gender, or optimism and SES. Overall, the results suggest that optimism is the factor most predictive of physical symptom reporting, followed by SES and gender. These results corroborate previous findings on the relationship between dispositional optimism and physical wellbeing, and point to crosscultural differences in relationship patterns. These differences suggest that although personality characteristics such as optimism may play an important role in the physical wellbeing of both Western and non‐Western groups, the influence of sociodemographic factors such as gender and SES and their interaction with cultural variables must not be overlooked.     

Effects of acute psychosocial stress exposure on endocrine and affective reactivity in college students differing in the 5-HTTLPR genotype and trait neuroticism

Enhanced stress vulnerability has been implicated in the pathogenesis of affective disorders. Although both genetic (5-HTTLPR) and cognitive (neuroticism) factors are known to increase stress vulnerability, no experimental study has investigated the interaction between these two factors on psychobiological reactivity following acute stress exposure. This study used a balanced experimental design to examine the interaction between the 5-HTTLPR genotype and trait neuroticism in neuroendocrine and affective stress responses. From a large group of 771 students, 48 carriers of the short/short (S/S) allele and 48 carriers of the long/long (L/L) allele with the lowest and the highest neuroticism scores (77 females, 19 males; mean age?±?SD: 20.6?±?2 years) were selected and exposed to an acute psychosocial stressor. Mood was assessed before and after the stressor, and salivary cortisol concentrations were measured before and at 20, 30, and 60?min after stressor onset. Acute stress increased salivary cortisol concentration regardless of either 5-HTTLPR genotype or neuroticism, but it caused a less profound negative mood change in L/L compared to S/S-allele carriers with the lowest neuroticism scores. The 5-HTTLPR genotype influences affective reactivity to acute stress conditional upon neuroticism, improving resilience to acute stress in L/L-allele carriers if they do not already possess high cognitive-affective (neuroticism) vulnerability.     

Negative cognitive response to a sad mood induction: Associations with polymorphisms of the serotonin transporter (5-HTTLPR) gene

Increased negative thinking in response to sad mood states has been identified as a marker of depression risk. The present study examined whether polymorphisms of the serotonin transporter (5-HTTLPR) gene were associated with the tendency to endorse negative cognition after sad or neutral mood inductions in a healthy college student sample. Non-depressed participants were genotyped for the 5-HTTLPR and then viewed films designed to elicit a sad mood (n=30) or a neutral mood (n=23). Analyses indicated that individuals homozygous for the short 5-HTTLPR allele endorsed more negative cognition following a sad mood induction than individuals homozygous for the long 5-HTTLPR allele. Negative cognition did not vary as a function of 5-HTTLPR genetic status in the neutral mood condition. These preliminary results suggest that genetic variation of the serotonin transporter may contribute to depression vulnerability via a tendency to think more negatively in response to events that elicit sad mood.     

面孔熟悉度对面孔性别与表情相互作用的调节

对于面孔性别与表情的关系, 目前的理论尚不完善。而众多研究证据表明, 面孔熟悉度与面孔性别及表情的加工均有密切关系。本研究基于Garner范式考察了在不同面孔熟悉度下面孔性别与表情的相互关系。共包括4项实验：实验1, 面孔刺激的身份陌生且不重复, 刺激在Garner范式的控制组和正交组中均仅呈现一次, 面孔熟悉度低; 实验2, 除面孔刺激的身份重复外, 其余均同实验1, 面孔熟悉度中等; 实验3, 面孔刺激的身份陌生且不重复, 但分别在控制组和正交组中重复呈现多次, 面孔熟悉度高; 实验4, 通过面孔学习增加面孔的熟悉度, 以直接验证面孔熟悉度的增加对面孔性别与表情相互关系的影响。结果发现：对于陌生面孔, 表情单向影响面孔性别的加工; 随着面孔熟悉度的增加, 面孔性别与表情之间出现双向的影响。因此, 面孔熟悉度对面孔性别与表情的相互影响具有调节作用。     

A cross-lagged model of self-esteem and life satisfaction: Gender differences among Chinese university students

Past research has shown a close relationship between self-esteem (SE) and life satisfaction (LS). Using cross-lagged structural equation modeling, the current longitudinal study examined the directionality of the relationship among a sample of Chinese university students (214 males and 134 females). In the model, SE and LS at Time 1 were used to predict SE and LS at Time 2, with socioeconomic status (SES) as the independent variable of both constructs. Results showed that SE consistently predicted subsequent LS among both genders, whereas no significant effects of LS on subsequent SE were found. Furthermore, SES had significant effects on LS among both genders. Its influence on SE, however, was significant among females only. Implications and limitations are discussed.