团队决策中的共享信息偏差:基于隐藏文档范式的机制、影响因素探究

在决策任务中,团队由于拥有来自不同成员的多样信息,因此通常被认为能够较个体做出更高质量的决策。但大量的研究结果表明,团队对于信息的利用并非十分有效,表现在团队会更多地讨论所有成员都拥有的信息(即共享信息),而相对忽视了每个成员所独有的信息(即非共享信息),这种现象被称为"共享信息偏差(Shared information bias)"(StasserTitus,1985)。共享信息偏差的存在阻碍了团队获取更高质量的决策结果。本文基于隐藏文档范式,针对共享信息偏差的产生原因,分别介绍了信息取样模型、动态信息取样模型、相互提升效应、偏好效应这4种解释机制,并归纳总结了信息分布、团队任务特征、成员特征及动机因素这4类影响因素的作用。最后,从结合团队认知、探究情绪因素及整合团队有效性框架这三个方面对未来的研究进行了展望。     

精神病态暴力犯执行功能的缺陷*

为了解精神病态罪犯可能存在的执行功能缺陷及其是否受冲动性影响,研究采用精神病态检核表（PCL-R）筛选出30名精神病态组被试和30名非精神病态组被试,通过爱荷华赌博任务（IGT）和河内塔任务（TOH）对两组被试执行功能的特点进行分析,并结合冲动性量表（BIS-11）对其冲动性进行测量。研究发现精神病态组的冲动性显著高于控制组;精神病态组选择高风险的不利牌显著多于对照组,即对惩罚不敏感;精神病态组在河内塔任务中的错误次数及所消耗时间都显著高于控制组;冲动性水平与两任务得分均无显著相关。结果表明,精神病态暴力犯在与前额叶相关的执行功能上存在缺陷,并与个体的高冲动性无关。     

临床决策的边界

探讨临床决策之边界,以期为临床医生合理决策提供参考。临床决策是日常医疗工作的核心内容,医生是临床决策的制定者和施行者。决策过程中,医生需综合考量多种因素,如病人的临床状况和真正需要解决的临床问题、法律法规、伦理和社会因素、诊疗规范和指南、经验总结、个案和基础研究、团队的技术能力、专业标准和临床预期等,这些因素组成了临床决策的基本边界,同时,这个边界会随着医学、文化、经济、社会的发展而变化。     

Decision-makers are resilient in the face of social exclusion

A growing body of evidence suggests that social exclusion impairs people's capacity for active deliberation and logical reasoning. Building on this finding and on the postulate from the dual-process theory that analytical thinking is essential in order to make good judgements and decisions, we hypothesized that social exclusion will alter judgement and choice behaviour. We tested this hypothesis in three experiments in which social exclusion was manipulated using the Cyberball paradigm, an online ball-tossing game in which participants either received the ball a fair number of times or were excluded by the other two players. We focused on a range of tasks designed to be sensitive to participants’ ability to engage in analytical thinking and careful deliberation, including the cognitive reflection test (Experiment 1) and a set of anchoring, intertemporal preference, disjunction, and confidence tasks (experiments 2 and 3). Our results unanimously failed to support the hypothesis that social exclusion influences people's judgements and decision-making. We discuss the implications of our findings for social exclusion theory.     

Information presentation format moderates the unconscious-thought effect: The role of recollection

The unconscious-thought effect occurs when distraction improves complex decision-making. In two experiments using the unconscious-thought paradigm, we investigated the effect of presentation format of decision information (i) on memory for decision-relevant information and (ii) on the quality of decisions made after distraction, conscious deliberation or immediately. We used the process-dissociation procedure to measure recollection and familiarity. The two studies showed that presenting information blocked per criterion led participants to recollect more decision-relevant details compared to a presentation by option. Moreover, a Bayesian meta-analysis of the two studies provided strong evidence that conscious deliberation resulted in better decisions when the information was presented blocked per criterion and substantial evidence that distraction improved decision quality when the information was presented blocked per option. Finally, Study 2 revealed that the recollection of decision-relevant details mediated the effect of presentation format on decision quality in the deliberation condition. This suggests that recollection contributes to conscious deliberation efficacy.     

The dynamics of bidirectional thought

High-level judgement and decision-making tasks display dynamic bidirectional relationships in which salient cues determine how responses are evaluated by decision-makers, and these responses in turn determine the cues that are considered. In this paper, we propose Kosko's bidirectional associative memory (BAM) network, a minimal two-layer recurrent neural network, as a mathematically tractable toy model with which the properties of existing bidirectional models, and the behavioural implications of these properties, can be studied. We first derive results regarding the dynamics of the BAM network, and then show how these results can be used to provide an analytically sound explanation for a number of important findings, including coherence shifts in judgement and choice, anchoring effects, and reference point effects.     

经济决策中人际信任博弈的理论模型与脑机制

信任是指个体在缺乏足够信息来判断他人动机、意图和行为的情况下,将社会资源交给对方处置并承担相应风险的意愿。作为一种基本的社会信号机制,信任对于发展和维持良好社会关系具有重要作用。借助信任博弈范式,研究者揭示了人际信任的认知神经机制并建构了多种理论,包括背叛厌恶理论、社会规范理论、道德规范理论和默认行为模型。脑成像研究发现信任行为主要涉及内侧前额叶、尾状核、杏仁核和脑岛等脑区,其中内侧前额叶主要参与心理推理、情绪认知与调控等过程,尾状核参与同伴值得信赖性的习得与编码,杏仁核和脑岛则主要参与风险、不确定性和背叛恐惧加工。今后研究应侧重不同理论之间的补充与整合,强化不同脑区之间的功能连接与整体性,并注重信任行为中的个体差异。     

Is more choice always worse? Age differences in the overchoice effect

Current research on the overchoice effect has been mainly conducted from an adult point of view and with adult subjects. This study investigates whether children, adolescents, and seniors suffer the same negative consequences as adults when facing an overabundance of choice. Findings showed that the overchoice effect did not equally extend to all age groups. While adolescents were affected by the phenomenon in a very similar way as adults, children and seniors suffered fewer negative consequences of an overabundance of choice. Theoretical and practical implications are discussed.     

Integrating motivational interviewing in career counseling: A case study

Motivational interviewing (MI) is receiving increasing attention in the field of career counseling. However, none of the previous studies have concretely presented how this method could and why it should be integrated in career counseling. Through the use of a single case study design, this paper illustrates how a brief MI (BMI) intervention can be integrated into career counseling interventions to help resolve career dilemmas. An analysis of the interactions between the client and his counselor using the Motivational Interviewing Skills Code 2.1 illustrates why this method can be useful for career counseling. Immediate and long-term effects of the global career counseling intervention on the client's career decision-making difficulties, as well as the specific impacts of the BMI intervention, are assessed. This case study shows that the BMI approach can be integrated in a career counseling intervention to help career counseling clients overcome career dilemmas and increase their readiness to make career choices.