基因-环境交互作用理论模型及其检验方法

素质?压力模型、不同易感性模型和优势敏感性模型是当前有关基因?环境交互作用的三种代表性理论模型。素质?压力模型认为“近墨者黑”或“出淤泥而不染”, 优势反应敏感性模型认为“近朱者赤”, 而不同易感性模型则兼收并蓄, 认为某些个体近墨则黑, 近朱则赤。检验上述模型的现实有效性是当前基因?环境交互作用研究领域的热点问题之一。概观而言, 分组回归和分层回归是常用的传统检验方法, 显著性区域分析法和新参数回归模型法则是新近兴起的。未来研究需要进一步探索三种模型的领域特殊性、种族差异等问题, 检验这些模型的方法也有待改善。     

他人积极情绪对自我控制资源的替代恢复及机制

替代恢复指通过想象他人资源恢复可恢复自身的资源。研究探讨了他人积极情绪的替代恢复及人际敏感性的调节作用。本研究以331名大学生为被试,实验1和2通过消词任务消耗自控资源后,用文字材料呈现他人积极、他人中性情绪和自我积极情绪,用定价任务考察自控资源的恢复,实验2通过眼神测验测量人际敏感性。结果发现,自控资源消耗后,他人积极情绪组对商品的平均定价比他人中性情绪组低,且只在眼测得分高的个体中存在,他人积极情绪组与自我积极情绪组没有差别。研究证实了他人积极情绪对自控资源的替代恢复及人际敏感性的调节作用。     

Impulsivity and reward sensitivity within the pen model: A test of discriminant hypotheses

Impulsivity and reward sensitivity are often treated as interchangeable constructs. This conflation may be traced back to Gray’s interpretation of impulsivity as the trait level manifestation of the Behavioral Activation System (BAS), that mediates sensitivity to rewards. In this study (N = 696) we evaluated discriminant hypotheses regarding the relationships between BAS-mediated reward sensitivity, impulsivity and Eysenck’s PEN superfactors. We hypothesized that reward sensitivity would be mainly linked with Extraversion, and that impulsivity would be primarily connected with Psychoticism. Hypotheses were tested using structural equation modelling and equality constraints tests. Results mostly supported our expectations: reward sensitivity was more strongly related to Extraversion than to the other PEN superfactors, while impulsivity was more strongly related to Psychoticism and Neuroticism. Implications for BAS and impulsivity research are discussed.     

The adolescent brain

Adolescence is a developmental period characterized by suboptimal decisions and actions that give rise to an increased incidence of unintentional injuries and violence, alcohol and drug abuse, unintended pregnancy and sexually transmitted diseases. Traditional neurobiological and cognitive explanations for adolescent behavior have failed to account for the nonlinear changes in behavior observed during adolescence, relative to childhood and adulthood. This review provides a biologically plausible conceptualization of the neural mechanisms underlying these nonlinear changes in behavior, as a heightened responsiveness to incentives while impulse control is still relatively immature during this period. Recent human imaging and animal studies provide a biological basis for this view, suggesting differential development of limbic reward systems relative to top-down control systems during adolescence relative to childhood and adulthood. This developmental pattern may be exacerbated in those adolescents with a predisposition toward risk-taking, increasing the risk for poor outcomes.     

Prevention-focused self-regulation and aggressiveness

The present research examined the relationship between individual differences in self-regulatory mechanisms as outlined in regulatory focus theory (promotion- and prevention-focused self-regulation) and aggressiveness. Two studies revealed that the more individuals’ habitual self-regulatory orientation is dominated by a prevention-focus, the more likely they are to score high on measures of cynical hostility, reciprocity norm endorsement, and aggressiveness. An additional study involving the manipulation of perceived violation of a reciprocity norm showed that predominantly prevention-focused participants were particularly sensitive to the experience of a norm violation and reacted in a hostile and aggressive manner following the norm violation experience. Findings indicate that a prevention-focused style of self-regulation is associated with aggressiveness and suggest that endorsement of (negative) reciprocity norms and sensitivity to norm violations are relevant factors that help explain the differences in aggressiveness observed among individuals with a predominantly prevention-focused style of self-regulation.     

Accuracy of judging others’ traits and states: Comparing mean levels across tests

Tests of accuracy in interpersonal perception take many forms. Often, such tests use designs and scoring methods that produce overall accuracy levels that cannot be directly compared across tests. Therefore, progress in understanding accuracy levels has been hampered. The present article employed several techniques for achieving score equivalency. Mean accuracy was converted to a common metric, pi [Rosenthal, R., & Rubin, D. B. (1989). Effect size estimation for one-sample multiple-choice-type data: Design, analysis, and meta-analysis. Psychological Bulletin, 106, 332–337] in a database of 109 published results representing tests that varied in terms of scoring method (proportion accuracy versus correlation), content (e.g., personality versus affect), number of response options, item preselection, cue channel (e.g., face versus voice), stimulus duration, and dynamism. Overall, accuracy was midway between guessing level and a perfect score, with accuracy being higher for tests based on preselected than unselected stimuli. When item preselection was held constant, accuracy was equivalent for judging affect and judging personality. However, comparisons must be made with caution due to methodological variations between studies and gaps in the literature.     

阅读障碍的巨细胞系统缺陷理论之争

近几年诸多研究者认为阅读障碍是由于视觉系统巨细胞功能缺陷引起的。他们从对比度敏感性研究、巨细胞抑制功能研究与视觉运动知觉功能的研究结果中得到了支持证据。就这个问题的研究进行综述,表明不论是巨细胞功能缺陷理论的支持者还是反对者,都从巨细胞的对比度敏感性、视觉运动知觉与巨细胞抑制功能上得到了一些研究结果的支持。巨细胞功能缺陷理论的支持者还从阅读障碍的神经生理学研究和阅读的脑功能研究中得到了一些支持性的证据。新的研究结果揭示了巨细胞系统缺陷理论与阅读之间的关系以及巨细胞系统缺陷理论的应用价值。在巨细胞系统缺陷理论的进一步研究中,还需要统一实验方法与实验标准以获得更多的证据,同时需要有新的方法来有效区分小细胞系统与巨细胞系统     

Anxiety sensitivity: a unique predictor of dropout among inner-city heroin and crack/cocaine users in residential substance use treatment

The present study examined the extent to which anxiety sensitivity (AS) at treatment entry was related to prospective treatment dropout among 182 crack/cocaine and/or heroin-dependent patients in a substance use residential treatment facility in Northeast Washington, DC. Results indicated that AS incrementally and prospectively predicted treatment dropout after controlling for the variance accounted for by demographics and other drug use variables, legal obligation to treatment (i.e., court-ordered vs. self-referred), alcohol use frequency, and depressive symptoms. Findings are discussed in relation to the role of AS in treatment dropout and substance use problems more generally.     

Perceived attachment: relations to anxiety sensitivity, worry, and GAD symptoms

This investigation examined the relation between perceived alienation from parents and peers, anxiety sensitivity (AS), and current worry and generalized anxiety disorder (GAD) symptoms with the goal of expanding the knowledge base on factors that may contribute to the development of AS and its role in worry. The mediating role of AS between perceptions of alienation and current worry and GAD symptoms was also examined. Ninety-four non-clinical worriers completed self-report questionnaires assessing their perceptions of attachment, AS levels, and worry and GAD symptoms. Even after controlling for worry and GAD symptoms, greater perceptions of alienation from mothers and peers were significantly associated with higher AS symptoms. AS as a unitary construct mediated the relation between perceptions of alienation from mothers and peers and worry and GAD symptoms. The facets fear of publicly observable symptoms and fear of cognitive dyscontrol also mediated this relation. The role of alienation in relation to AS, worry, and GAD symptoms is discussed along with directions for future research.