The dissemination of critical,unshared information in decision‐making groups: the effects of pre‐discussion dissent

Previous research in group decision making has found that in situations of a hidden profile (i.e. the best choice alternative is hidden from individual members as they consider their pre‐discussion information), unshared information is disproportionately neglected and sub‐optimal group choices are highly likely. In an experimental study, three‐person groups decided which of three candidates to select for a professorial appointment. We hypothesised that minority dissent in pre‐discussion preferences improves the consideration of unshared information in groups and increases the discovery rate of hidden profiles. As predicted, consideration of unshared information increased with minority dissent. The expectation of an improvement of group decision quality was partially supported. In diversity groups (i.e. each member prefers a different alternative) consideration of unshared information and group decision quality was significantly higher than in simple minority groups. Results are discussed in the light of theories of minority influence. The benefits of using the hidden profile paradigm with minority and diversity groups for theory development in the area of group decision making are highlighted. Copyright © 2002 John Wiley & Sons, Ltd.     

Liberal Nationalism and Cosmopolitan Justice

Many liberals have argued that a cosmopolitan perspective on global justice follows from the basic liberal principles of justice. Yet, increasingly, it is also said that intrinsic to liberalism is a doctrine of nationalism. This raises a potential problem for the liberal defense of cosmopolitan justice as it is commonly believed that nationalism and cosmopolitanism are conflicting ideals. If this is correct, there appears to be a serious tension within liberal philosophy itself, between its cosmopolitan aspiration on the one hand, and its nationalist agenda on the other. I argue, however, that this alleged conflict between liberal nationalism and cosmopolitan liberalism disappears once we get clear on the scope and goals of cosmopolitan justice and the parameters of liberal nationalism. Liberal nationalism and cosmopolitan global justice, properly understood, are mutually compatible ideals.     

中学生责任心的理论构建研究

责任心是一种自觉地把分内的事做好的重要人格特质,具有多维度多层次的心理结构.参照有关文献建立了中学生责任心结构模型,编制出我国中学生责任心量表.通过对747名中学生的探索性因素分析和1009名中学生的验证性因素分析,结果表明该量表结构清晰,信度和效度较好,可以作为评鉴中学生责任心的有效工具.     

情绪调节策略对推理的影响

研究使用两种推理题作为实验材料.比较了负性情绪诱发状态下情绪调节策略使用与否以及不同情绪调节策略对推理的影响.结果发现,认知重评组的成绩好于表达抑制组和无调节组,存在显著差异;表达抑制组与无调节组之间不存在差异.此外,在表达抑制组上,男生的图形推理成绩好于女生,存在显著的性别差异.因此,个体不同推理任务的成绩与是否使用调节策略、使用什么策略及性别有关.     

What is the shape of developmental change?

Developmental trajectories provide the empirical foundation for theories about change processes during development. However, the ability to distinguish among alternative trajectories depends on how frequently observations are sampled. This study used real behavioral data, with real patterns of variability, to examine the effects of sampling at different intervals on characterization of the underlying trajectory. Data were derived from a set of 32 infant motor skills indexed daily during the first 18 months. Larger sampling intervals (2-31 days) were simulated by systematically removing observations from the daily data and interpolating over the gaps. Infrequent sampling caused decreasing sensitivity to fluctuations in the daily data: Variable trajectories erroneously appeared as step functions, and estimates of onset ages were increasingly off target. Sensitivity to variation decreased as an inverse power function of sampling interval, resulting in severe degradation of the trajectory with intervals longer than 7 days. These findings suggest that sampling rates typically used by developmental researchers may be inadequate to accurately depict patterns of variability and the shape of developmental change. Inadequate sampling regimes therefore may seriously compromise theories of development.     

Continual training of attentional bias in social anxiety

Using the dot-probe paradigm, it has been shown that high social anxiety is associated with an attentional bias toward negative information. In the present study, individuals with high social anxiety were divided into two groups randomly. One group was the attentional bias training group (Group T), and the other was the control group (Group C). For Group T, 7 days' continuous training of attentional bias was conducted using the dot-probe paradigm to make socially anxious individuals focus more on positive face pictures. The results showed that the training was effective in changing attentional bias in Group T. Scores of the Social Interaction Anxiety Scale (SIAS) in Group T were reduced compared to Group C, while the scores of Social Phobia Scale (SPS) and scores of Negative Evaluation Scale (FNE) showed no difference between the two groups, which suggested a limited reduction of social anxiety.     

Generalization and similarity in exemplar models of categorization: Insights from machine learning

Exemplar theories of categorization depend on similarity for explaining subjects’ ability to generalize to new stimuli. A major criticism of exemplar theories concerns their lack of abstraction mechanisms and thus, seemingly, of generalization ability. Here, we use insights from machine learning to demonstrate that exemplar models can actually generalize very well. Kernel methods in machine learning are akin to exemplar models and are very successful in real-world applications. Their generalization performance depends crucially on the chosen similarity measure. Although similarity plays an important role in describing generalization behavior, it is not the only factor that controls generalization performance. In machine learning, kernel methods are often combined with regularization techniques in order to ensure good generalization. These same techniques are easily incorporated in exemplar models. We show that the generalized context model (Nosofsky, 1986) and ALCOVE (Kruschke, 1992) are closely related to a statistical model called kernel logistic regression. We argue that generalization is central to the enterprise of understanding categorization behavior, and we suggest some ways in which insights from machine learning can offer guidance.     

Rehearsal in immediate serial recall

We report for the first time overt rehearsal data in immediate serial recall (ISR) undertaken at three presentation rates (1, 2.5, and 5 sec/word). Two groups of participants saw lists of six words for ISR and were required either to engage in overt rehearsal or to remain silent after reading aloud the word list during its presentation. Typical ISR serial position effects were obtained for both groups, and recall increased with slower rates. When participants rehearsed, they tended to do so in a cumulative forward order up to Serial Position 4, after which the amount of rehearsal decreased substantially. There were similarities between rehearsal and recall data: Both broke down toward the end of longer sequences, and there were strong positive correlations between the maximum sequence of participants' rehearsals and their ISR performance. We interpret these data as suggesting that similar mechanisms underpin both rehearsal and recall in ISR.     

Problem-Solving Ability and Stress Mediate the Relationship Between Creativity and Happiness

Many studies have found that creativity tends to promote happiness, but the underlying mechanism remains unclear. This study proposed and tested a serial mediation model to investigate the relationships among creativity, problem solving, stress, and happiness on emerging adults and adolescents (N = 1,146). It is hypothesized that creativity is conducive to happiness indirectly through (a) problem-solving ability, (b) stress, and (c) problem-solving ability and then stress (i.e., serial mediating effect). Undergraduate students and secondary school students self-reported their creativity, social problem-solving ability, stress, happiness, and life satisfaction. The mediating role of problem-solving ability and the serial mediating effect were found statistically significant while controlling the effect of life satisfaction. The mediating role of stress, however, was not supported. The findings not only lend further support to the beneficial effect of self-perceived creativity on happiness, but also extend our understanding on the relationship by revealing the underlying process.     

Worth the wait: Children trade off delay and reward in self‐ and other‐benefiting decisions

Human prosocial behaviors are supported by early‐emerging psychological processes that detect and fulfill the needs of others. However, little is known about the mechanisms that enable children to deliver benefits to others at costs to the self, which requires weighing other‐regarding and self‐serving preferences. We used an intertemporal choice paradigm to systematically study and compare these behaviors in 5‐year‐old children. Our results show that other‐benefiting and self‐benefiting behavior share a common decision‐making process that integrates delay and reward. Specifically, we found that children sought to minimize delay and maximize reward, and traded off delays against rewards, regardless of whether these rewards were for the children themselves or another child. However, we found that children were more willing to invest their time to benefit themselves than someone else. Together, these findings show that from childhood, other‐ and self‐serving decisions are supported by a general mechanism that flexibly integrates information about the magnitude of rewards, and the opportunity costs of pursuing them. A video abstract of this article can be viewed at: https://youtu.be/r8S0DGe7f8Q