The use of recognition in group decision-making

Goldstein and Gigerenzer (2002) [Models of ecological rationality: The recognition heuristic. Psychological Review, 109 (1), 75-90] found evidence for the use of the recognition heuristic. For example, if an individual recognizes only one of two cities, they tend to infer that the recognized city has a larger population. A prediction that follows is that of the less-is-more effect: Recognizing fewer cities leads, under certain conditions, to more accurate inferences than recognizing more cities. We extend the recognition heuristic to group decision-making by developing majority and lexicographic models of how recognition information is used by groups. We formally show when the less-is-more effect is predicted in groups and we present a study where three-member groups performed the population comparison task. Several aspects of our data indicate that members who can use the recognition heuristic are, not in all but in most cases, more influential in the group decision process than members who cannot use the heuristic. We also observed the less-is-more effect and found that models assuming that members who can use the recognition heuristic are more influential better predict when the effect occurs.     

模态系统的推理规则的强弱虚实

模态系统的推理规则可以用强弱虚实这四种性质进行分类。在一个系统中这几种性质无论在语形上还是语义上都有一定的联系和区别,有些性质在一个系统的变种或扩充中并不一定保持。     

Effects of group decision rules on decisions involving continuous alternatives: The unanimity rule and extreme decisions in mock civil juries

Two experiments examined the effects of majority and unanimity decision rules on group decisions involving continuous alternatives. Each experiment used mock civil juries to test three hypotheses related to the claim that when the distribution of group members’ initial preferences is skewed, the group’s decision will be influenced more by the presence of outlier members under unanimity rule than under majority rule. Experiment 1 tested the hypotheses using a punitive damages case and positively skewed preference distributions. Experiment 2 tested the hypotheses using a compensatory damages case and manipulating the skewness of preference distributions in a 2 (group decision rule) × 2 (valence of skewness) factorial design. In both experiments, the extreme (outlier) member’s individual preference was significantly correlated with the group decision only under unanimity rule. A simple thought experiment based on the experimental results is suggested regarding the implications of using unanimity or majority rule for making decisions in civil juries.     

Integrative and Distributive Negotiation in Small Groups: Effects of Task Structure, Decision Rule, and Social Motive

This study examined the interactive effects of task structure, decision rule, and social motive on small-group negotiation processes and outcomes. Three-person groups negotiated either within an asymmetrical task structure (in which a majority of group members have compatible interests) or within a symmetrical task structure (in which no such majority exists). Groups negotiated either under unanimity rule or under majority rule, and group members were either egoistically or prosocially motivated. Results revealed cumulative main effects and the predicted three-way interaction: Groups in an asymmetrical task structure engaged in more distributive and less integrative behavior, reached lower joint outcomes, and experienced a less positive group climate especially when they had an egoistic rather than prosocial motivation and unanimity rather than majority rule applied. Theoretical implications and avenues for future research are discussed.     

Procedural justice,identity and deference to the law: What shapes rule‐following in a period of transition?

The group engagement model has two core arguments. The first is that procedural justice shapes rule‐following in groups, organisations and societies. The second is that the influence of procedural justice upon rule‐following is mediated by changes in people's identification with groups. This study uses a sample of South Africans to test both arguments. While the procedural justice argument has already been widely tested and supported, this study extends that test to a society in rapid transition and upheaval. Further, it tests the identity mediation argument in the same context. The results support both arguments. Procedural justice shapes rule‐following and that influence is mediated by identification with superordinate authority.     

Equivalents for a Quasivariety to be Generated by a Single Structure

We present some equivalent conditions for a quasivariety of structures to be generated by a single structure. The first such condition, called the embedding property was found by A.I. Mal′tsev in [6]. It says that if are nontrivial, then there exists such that A and B are embeddable into C. One of our equivalent conditions states that the set of quasi-identities valid in is closed under a certain Gentzen type rule which is due to J. Łoś and R. Suszko [5]. Presented by Jacek Malinowski     

Male–male combats in a polymorphic lizard: residency and size,but not color,affect fighting rules and contest outcome

Theoretical models predict that the outcome of dyadic agonistic encounters between males is influenced by resource‐holding potential, resource value, and intrinsic aggressiveness of contestants. Moreover, in territorial disputes residents enjoy a further obvious competitive advantage from the residency itself, owing to the intimate familiarity with their territory. Costs of physical combats are, however, dramatically high in many instances. Thus, signals reliably reflecting fighting ability of the opponents could easily evolve in order to reduce these costs. For example, variation in color morph in polymorphic species has been associated with dominance in several case studies. In this study, we staged asymmetric resident‐intruder encounters in males of the common wall lizard Podarcis muralis, a species showing three discrete morphs (white, yellow, and red) to investigate the effects of asymmetries in color morph, residency, and size between contestants on the outcome of territorial contests. We collected aggression data by presenting each resident male with three intruders of different color morph, in three consecutive tests conducted in different days, and videotaping their interactions. The results showed that simple rules such as residency and body size differences could determine the outcome of agonistic interactions: residents were more aggressive than intruders, and larger males were competitively superior to smaller males. However, we did not find any effect of color on male aggression or fighting success, suggesting that color polymorphism in this species is not a signal of status or fighting ability in intermale conflicts. Aggr. Behav. 35:274–283, 2009. © 2009 Wiley‐Liss, Inc.     

Tatsuoka 矩阵理论的修正

K .K.Tatsuoka和她同事开发的规则空间模型（RSM）是一种在国内外有较大影响的认知诊断模型,但是Tatsuoka的RSM中 矩阵理论存在缺陷和错误,这些失误使得RSM中用布尔描述函数（BDF）计算被试理想项目反应模式（IRP）的方法缺乏理论依据。这里揭示了Tatsuoka的 矩阵理论的缺陷和错误并引进既不使用BDF又便于应用的计算IRP的方法;接着还介绍一种由可达阵计算简化 阵的方法,该方法显示了可达阵在构造认知诊断测验的重要性。这些结果对丰富 矩阵理论及正确使用RSM进行认知诊断有一定的意义     

儿童行为与心理水平的特质推理的发展

选取4岁组、5岁组、7岁组、10岁组、12岁组儿童和成人共192名(各年龄组32名, 男女各半)为被试, 采用个别测查法考察学前和小学儿童行为与心理水平的特质推理发展。结果表明: (1)4岁时儿童已能进行行为水平的特质推理, 5岁时才能进行心理水平的特质推理, 即使用特质引发规则进行特质推理, 10岁时两者均达到成人水平。(2)4岁、5岁时儿童心理水平的特质推理显著落后于行为水平的特质推理, 至少7岁时两者处于同一水平上。(3)儿童使用概念相似规则而不是情境匹配规则进行行为预测。(4)4岁儿童不使用简单效价规则进行行为预测, 5岁及以上儿童使用简单效价规则, 但他们是在区分同一特质范畴和不同特质范畴的基础上、在较低的确定程度上使用该规则。     

德法次序:一种现代政治伦理学叙事

道德和法律的关系,是体现现代性本质的一个核心问题。“德法次序”概念,可以将日常德治和法治关系的探讨,纳入到具有普遍性的政治哲学框架中来,实现一种现代政治哲学叙事。