Discounting of food and water in rats shows trait- and state-like characteristics

Delay discounting is the loss in value of an outcome as a function of its delay. The present study focused on examining a trait-like characteristic of delay discounting in a preclinical animal model. Specifically, we were interested in whether there was a positive relation between discounting of 2 different outcomes in rats. That is, would rats that discount delayed food steeply also discount delayed water steeply? In addition, we examined how session-to-session variability in discounting could be attributed to differences between subjects (trait variability) and to differences within subjects (state variability). Finally, we measured discounting from early- to mid-adulthood, allowing us to examine changes in discounting as a function of age. Overall, we found a moderate, positive correlation between discounting of food and discounting of water in rats, providing further evidence that the relative consistency with which individuals discount different outcomes is a trait-like characteristic. In addition, we found a high degree of within-subject variability in discounting, indicating strong state-like differences from session to session. Finally, overall, discounting decreased as a function of age; however, individual-subject data showed variability in how discounting changed across time. Overall, our results show that differences in delay discounting between individuals reflect variability in both trait- and state-like characteristics.     

Assessment of successful smoking cessation by psychological factors using the Bayesian network approach

The association between psychological factors and smoking cessation is complicated and inconsistent in published researches, and the joint effect of psychological factors on smoking cessation is unclear. This study explored how psychological factors jointly affect the success of smoking cessation using a Bayesian network approach. A community-based case control study was designed with 642 adult male successful smoking quitters as the cases, and 700 adult male failed smoking quitters as the controls. General self-efficacy (GSE), trait coping style (positive-trait coping style (PTCS) and negative-trait coping style (NTCS)) and self-rating anxiety (SA) were evaluated by GSE Scale, Trait Coping Style Questionnaire and SA Scale, respectively. Bayesian network was applied to evaluate the relationship between psychological factors and successful smoking cessation. The local conditional probability table of smoking cessation indicated that different joint conditions of psychological factors led to different outcomes for smoking cessation. Among smokers with high PTCS, high NTCS and low SA, only 36.40% successfully quitted smoking. However, among smokers with low pack-years of smoking, high GSE, high PTCS and high SA, 63.64% successfully quitted smoking. Our study indicates psychological factors jointly influence smoking cessation outcome. According to different joint situations, different solutions should be developed to control tobacco in practical intervention.     

自发特质推理中的社会刻板效应

近来, 考察自发特质推理中的社会刻板效应, 成为自发特质推理研究的一个新趋势。在介绍自发特质推理及其研究范式的基础上, 概述了刻板印象与特质的概念联系, 并阐明了考察自发特质推理中的社会刻板效应的理论依据和方法。接着, 对自发特质推理中的职业、种族和性别刻板效应研究进行了回顾, 发现刻板印象对自发特质推理的影响主要通过它对自发特质推理的阻碍作用体现出来, 在高认知负荷下, 这种阻碍作用更为明显。最后, 从研究对象、研究方法、研究内容三个方面对该领域的研究进行了评价和展望。     

何以近朱者赤、近墨者黑?特质激活理论的缘起、现状和未来

特质激活理论旨在阐明适宜的外部情境如何激活个体的内在特质, 以及这种激活如何促使潜藏的隐性特质表达出显性的行为。文章综述了特质激活理论, 剖析了其从思想诞生到基准模型, 再到拓展模型的两次飞跃, 重点阐释了情境分层、情境特征、激活后果的反馈等系统, 辨析了特质激活的内涵及其与“人-环境”匹配理论、与情境强度理论的异同, 从深化验证、拓展现有理论模型等视角提出未来研究走向。     

食物线索注意偏向及其神经机制

与其他类型的刺激相比, 个体会优先注意食物相关刺激, 即对食物刺激的注意偏向。对影响食物线索注意偏向个体因素研究的分析发现：(1)在状态因素中, 饥饿以及与自我威胁有关的、唤起强度大的负性情绪对食物线索注意偏向有增强作用, 这在注意加工的早期和晚期都有体现; (2)在特质因素中, 行为研究发现, 相比于体重正常个体和非限制性饮食者, 超重/肥胖个体以及唤起节食目标的成功限制性饮食者没有更强的注意偏向, 但是, ERP研究发现, 在注意加工的早期阶段, 就出现了特质因素对食物线索注意偏向的影响; (3) fMRI研究发现, 对食物线索的注意过程伴随着脑岛、眶额叶皮层等与奖励相关的脑区及视觉注意网络的激活。未来研究需要：(1)从动态角度研究注意偏向, 进一步提高测量的信度; (2)使用专门的范式探究个体因素影响注意偏向的神经机制; (3)严格分离不同状态因素; (4)对被试进行严谨筛选和划分, 做好被试间的对比研究。     

特质焦虑初中生使用减弱调节策略的效果:一项ERP研究

采用情绪反应性-调节图片任务,考察特质焦虑青少年在下调负性情绪反应时的神经生理变化。结果发现,从行为学数据上看,两组被试都能达到下调目标,但低特质焦虑组的调节能力较强。从脑电数据上看,在刺激呈现之后300-600ms,高特质焦虑被试在负性情绪减弱调节效应方面显著小于低特质焦虑被试。在600-1000ms,高特质焦虑被试产生的LPP显著大于低特质焦虑被试。在1000ms以后,两组被试不存在显著差异。这就表明,我国高特质焦虑青少年对情绪反应有意调节能力总体较好,但较低特质焦虑青少年而言可能存在一定滞后性。     

Delay discounting of different outcomes: Review and theory

Steep delay discounting is characterized by a preference for small immediate outcomes relative to larger delayed outcomes and is predictive of drug abuse, risky sexual behaviors, and other maladaptive behaviors. Nancy M. Petry was a pioneer in delay discounting research who demonstrated that people discount delayed monetary gains less steeply than they discount substances with abuse liability. Subsequent research found steep discounting for not only drugs, but other nonmonetary outcomes such as food, sex, and health. In this systematic review, we evaluate the hypotheses proposed to explain differences in discounting as a function of the type of outcome and explore the trait- and state-like nature of delay discounting. We found overwhelming evidence for the state-like quality of delay discounting: Consistent with Petry and others' work, nonmonetary outcomes are discounted more steeply than monetary outcomes. We propose two hypotheses that together may account for this effect: Decreasing Future Preference and Decreasing Future Worth. We also found clear evidence that delay discounting has trait-like qualities: People who steeply discount monetary outcomes steeply discount nonmonetary outcomes as well. The implication is that changing delay discounting for one outcome could change discounting for other outcomes.     

某大学学生的DISC人格特质调查分析

目的：了解某大学学生的人格特质。方法：本研究以184名学生为被试,通过SPSS11.5统计软件进行统计分析。结果：①该大学学生的人格特质类型以稳定性-S型为主,其中,S-1和S-2类型的居多;②性别差异在人格特质的服从性上差异显著,其中,男生的服从性高于女生的服从性;③学历差异在人格特质的稳定性上差异显著,其中,本科生的稳定性高于研究生的稳定性。结论：本研究能从某一程度上反映该大学学生的人格特质。     

中国大学生特质自尊的结构维度探索

国外研究对Tafarodi和Swann(1995)基于特质自尊二维模型编制的"自我喜爱感/自我能力感量表"(SLCS)的结构维度尚存疑义。本研究以中国文化背景中的两组大学生为被试,分别采用探索性因素分析和验证性因素分析方法,考察了该量表的内部结构。结果发现:(1)删除原量表4个项目后由16个项目构成的"自我喜爱感/自我能力感量表"由自我能力感和自我喜爱感两个维度构成,且相对于自我喜爱感、自我能力感对中国大学生特质自尊结构具有更强的解释力;(2)中国大学生群体应用该量表具有较理想的项目区分度、内部一致性信度、构想效度和区分效度;(3)男女大学生的自尊体验在总体上无显著差异,但文科类男生的自我能力感显著高于女生,而工科类女生的自我能力感显著高于男生。     

基于不同研究取向的应对问卷述评

随着社会的发展,人们现实和精神压力的增大,压力应对方式的研究日益受到广泛重视。研究者们依据不同的理论模型建构了各种应对问卷,此文总结了5种主要的应对研究取向,包括应对过程研究取向、应对特质研究取向、应对认知思维研究取向、应对能力研究取向以及特定情境应对研究取向等,并对相应的问卷做了一个整体的回顾,最后提出了应对研究发展的新方向以及对应对测量工具提出的新要求