农村留守儿童焦虑情绪的异质性:基于潜在剖面分析

采用中学生心理健康诊断量表（MHT）对湖南省1292名留守儿童的焦虑情绪进行施测,并用潜在剖面分析方法探究留守儿童的焦虑情绪问题是否存在异质性,以及留守儿童相关的人口学因素对焦虑情绪异质性的作用机制。结果发现,留守儿童的焦虑情绪存在明显的异质性,可以分为三种潜在类别：“严重焦虑情绪型”、“中等程度焦虑情绪型”和“低焦虑情绪型”;留守男生、小学五年级、高中二年级、留守时间越长、留守初始年龄越小的留守儿童更容易焦虑情绪严重;无论是父亲外出、母亲外出还是双亲外出对留守儿童的焦虑情绪严重性的影响是一致的。由此,应根据留守儿童的性别、年级、留守时长和留守的初始年龄等情况特点,开展针对性的预防和干预措施,缓解留守儿童焦虑。     

核黄素对食管癌预防和治疗作用的研究

核黄素缺乏是导致食管癌发生的主要危险因素之一,补充核黄素可以有效降低食管癌发病风险,但这一作用存在明显个体差异,从而限制了核黄素补给在食管癌变预防和治疗中的应用.食管癌全基因组关联分析发现核黄素转运基因C20orf54是食管癌的重要易感基因之一,后者对核黄素有效转入细胞内起重要作用,提示C20orf54基因变异可能是导致补充核黄素预防食管癌存在个体差异的主要原因,对补充核黄素预防和治疗食管癌变提供理论指导.核黄素缺乏(环境因素)和基因变异(遗传因素)对食管癌发生的影响进一步揭示食管癌的发生是内因和外因交互作用的结果.     

Evidence of the Psychometric Integrity of the Creative Personality Scale using Item Response Theory Models

Gough’s Creative Personality Scale (CPS) has been very widely used to assess creative personality characteristics, and many researchers have argued that it is associated with strong reliability and validity evidence. However, findings vary considerably across the samples used in each study, suggesting that an analysis using the item response theory framework would provide more useful evidence of the instrument’s psychometric integrity. Results suggest that the CPS is multidimensional, and some items have low discrimination indices. Additionally, significant correlations between participants’ trait estimates (i.e., estimated creative personality) and their engagement in a range of creative activities indicate that the CPS is associated with convincing evidence of criterion-related validity.     

Gaze cueing as a function of perceived gaze direction

Previous studies have found that attention is automatically oriented in the direction of other people's gaze. This study directly investigated whether the perceiving gaze direction modulates the orienting of observers' attention. Gaze perception was manipulated by changing the face context (head orientation) of the gaze cue: the perceived gaze angle was increased (or decreased) when the head and gaze are congruent (or incongruent), while the local‐feature information of the eye region was preserved for all stimuli. The results showed that gaze‐cueing effects were enhanced when the perceived gaze direction was averted more toward left or right, and reduced when the perceived gaze direction was closer to direct gaze. The results suggest that gaze‐cueing effects are based on mechanisms specialized for gaze perception, and the magnitude of gaze‐cueing effects was probably a function of the perceived gaze direction.     

Conflict-driven adaptive control is enhanced by integral negative emotion on a short time scale*

ABSTRACT

Negative emotion influences cognitive control, and more specifically conflict adaptation. However, discrepant results have often been reported in the literature. In this study, we broke down negative emotion into integral and incidental components using a modern motivation-based framework, and assessed whether the former could change conflict adaptation. In the first experiment, we manipulated the duration of the inter-trial-interval (ITI) to assess the actual time-scale of this effect. Integral negative emotion was induced by using loss-related feedback contingent on task performance, and measured at the subjective and physiological levels. Results showed that conflict-driven adaptive control was enhanced when integral negative emotion was elicited, compared to a control condition without changes in defensive motivation. Importantly, this effect was only found when a short, as opposed to long ITI was used, suggesting that it had a short time scale. In the second experiment, we controlled for effects of feature repetition and contingency learning, and replicated an enhanced conflict adaptation effect when integral negative emotion was elicited and a short ITI was used. We interpret these new results against a standard cognitive control framework assuming that integral negative emotion amplifies specific control signals transiently, and in turn enhances conflict adaptation.     

Aggregating and Testing Intra-Individual Correlations: Methods and Comparisons

From a longitudinal study, we have repeatedly measured data from multiple individuals at multiple occasions. For each individual, the relation between 2 variables can be measured by the Pearson’s correlation. The question is how to aggregate the multiple correlations and conduct statistical inference on the aggregated intra-individual correlation. Several methods are proposed to aggregate and test intra-individual correlations: (a) a meta-analysis method based on Fisher’s Z transformed correlations, (b) a meta-analysis method based on the Pearson’s correlations, and (c) a multilevel modeling method using data standardized within each individual. The performance of the methods after bias corrections was compared using simulations with considering factors including numbers of individuals, numbers of time points, population effect sizes, and their distribution forms (homogeneous vs heterogeneous). The results from the simulation studies show that estimation biases were found using the meta-analytic methods and suggestions on when and how to correct biases were provided based on the simulation results. Furthermore, the performance of the 3 methods after necessary bias corrections was found to be comparable and reasonably good, indicating that all 3 methods worked for aggregating and testing intra-individual correlations. An empirical daily diary data set was then used to illustrate the applications of the 3 methods. The assumptions, advantages and disadvantages, and possible extensions of the 3 methods were discussed.     

How benefits of expressive writing vary as a function of writing instructions,ethnicity and ambivalence over emotional expression

Written emotional disclosure has been reported to confer a variety of benefits on physical and psychological well-being. However, variable findings suggest that outcomes may vary systematically as a function of specific parameters of the experimental design. This study aims to investigate the unique and combined effects of disclosure instructions focusing on emotional expression and instructions facilitating cognitive reappraisal and to examine how ambivalence over emotional expression and ethnicity moderate the effects of these writing instructions. Seventy-one Asian and 59 Caucasian undergraduates (N = 130) with at least minimal physical or depressive symptoms were randomly assigned to one of the four writing conditions: emotional disclosure (ED), cognitive reappraisal (COG), the combination of ED and COG, or a control condition. Self-reported physical symptoms, positive affect (PA) and negative affect were assessed at baseline and three follow-ups spanning 4 months. Mixed linear models revealed that COG writing reduced physical symptoms, ED buffered a decrease in PA over time, and the combination of ED and COG (i.e. self-regulation; SR) was most effective. Asians and highly ambivalent participants benefited most from expressive writing. Findings contribute to the development of a SR moderator model and carry implications for designing expressive disclosure studies, particularly for ethnic minorities.     

欺骗的神经机制和测谎应用:来自fMRI研究的证据

功能核磁共振成像技术在探讨欺骗机制和开发测谎技术中的应用是目前的研究热点,前者使用多种范式来考察假装失忆、故意错误及人际交互中的欺骗行为的认知和神经机制,而后者主要沿用传统的GKT和CQT范式检测欺骗行为。已有研究突显了前额叶和顶叶这些参与执行控制过程的脑区在欺骗中的核心作用,但基于这些脑区信号进行测谎时,得到的准确率不容乐观。未来研究应探索除执行控制过程外的欺骗的其它认知成分,尝试从"记忆痕迹"和"欺骗结果"等方面寻找测谎的新线索。并应揭示"欺骗特质"的神经基础,以启发"忠诚度"的测量方法。     

求职者简历作假行为结构及影响因素研究

求职者简历作假行为是指求职者在简历投递过程中,为提升进入下一轮选拔几率,在简历中表现出虚假信念或信息的行为。研究通过访谈和问卷调查方法,探讨了求职者简历作假行为的结构,以及大学生求职群体简历作假行为的影响因素与特点。结果表明:(1)求职者的简历作假行为包含迎合招聘企业、篡改个人信息、粉饰关键词句和提升匹配程度四个因素。(2)马基雅维利主义倾向可以预测其简历作假行为。(3)大学生求职者的简历作假行为在其简历投递次数以及简历修改次数上存在差异。