Collective Action as Individual Choice

We argue that conceptual analyses of collective action should be informed by game-theoretic analyses of collective action. In particular, we argue that Ariel Rubenstein’s so-called ‘Electronic Mail Game’ provides a useful model of collective action, and of the formation of collective intentions.     

A social identity model of riot diffusion: From injustice to empowerment in the 2011 London riots

Previous research has shown that riots spread across multiple locations, but has not explained underlying psychological processes. We examined rioting in three locations during the August 2011 disorders in England to test a social identity model of riot diffusion. We triangulated multiple sources to construct a narrative of events; and we analysed interviews with 68 participants to examine experiences. In line with the model, we found evidence for two pathways of influence: “cognitive” and “strategic”. For some participants, previous rioting was highly self-relevant, and shared identity was the basis of their subsequent involvement. For others, previous rioting was empowering because it demonstrated the vulnerability of a common enemy (the police). In each location, interaction dynamics mediated the link between initial perceptions and collective action. The utility of this social identity approach is that it is able to account for both the boundaries and the sequence of urban riot diffusion.     

Greens or space invaders: Prominent utopian themes and effects on social change motivation

One way in which individuals can participate in action to change the society they live in is through the pursuit of an ideal society or “utopia”; however, the content of that utopia is a likely determinant of its motivational impact. Here we examined two predominant prototypes of utopia derived from previous research and theory—the Green and Sci-Fi utopias. When participants were primed with either of these utopias, the Green utopia was perceived to entail a range of other positive characteristics (e.g., warmth, positive emotions) and—provided it was positively evaluated—tended to elicit both motivation and behaviour for social change. In contrast, the Sci-Fi utopia was associated with low motivation, even when it was positively evaluated. Furthermore, the Green utopia was shown to elicit greater perceptions of participative efficacy, which in turn predicted the increase in social change motivation.     

The Impact of Comprehensive Community Initiatives on Population-Level Child,Youth, and Family Outcomes: A Systematic Review

Comprehensive community initiatives (CCIs) represent a popular method for creating systemic change, yet there is a dearth of evidence on their effectiveness (Zaff, Pufall Jones, Donlan, Lin, & Anderson, 2016). This article presents a systematic review of the evidence on the population-level impact of CCIs, focusing specifically on documented effects from studies using an experimental or quasi-experimental design. Of 1,947 articles identified through a database and hand search, 25 articles examining six different CCIs—most of which employed prevention science frameworks—met the review inclusion criteria. The results of this review show that CCIs can strengthen protective factors and reduce risk factors, delay initiation of and reduce substance use, and reduce the likelihood of, and delay engagement in, violent and/or delinquent behaviors. Impacts have been documented as soon as one year after initial intervention, and as early as 7^th grade, with effects sustained as long as seven years post-intervention, and as late as a year post-high school. However, relative to the prevalence of CCIs as a practical intervention, the evidence base is small, potentially dated, and focused on a narrow set of outcomes and populations. Recommendations for interpreting the evidence base are discussed, including methodological limitations and implications for future work.     

Perceived collective continuity and ingroup identification as defence against death awareness

Perhaps unique among the animal species, humans are aware that they will ultimately die. Terror management theory (TMT) posits that investing in a social group helps people to manage paralysing anxiety stemming from death awareness. In line with this proposition, research to date has shown that when reminded of their own mortality, people increase their identification with a relevant group and defend its beliefs, values, and practices. In the reported study, we demonstrate that a mortality salience induction enhances people’s perceptions of group temporal endurance—or perceived collective continuity (PCC), as we define it. Enhanced PCC leads, in turn, to enhanced group identification. This is in line with the TMT assumption that death awareness leads people to invest in a social group because this constitutes a temporally enduring meaning-system that imbues life with meaning, order, and permanence, and promises death transcendence to those who meet the prescribed standards of value.     

小学生团队合作学习成绩之群体影响因素研究

将小学四年级实验班42名小学生组建成七个异质团队,进行为期三个月的团队合作学习训练,以探讨群体变量对团队合作学习成绩的影响,并比较实验班和对照班之间语文成绩之间的差异。研究结果表明:团队组长管理风格、团队承诺、团队集体效能感、团队凝聚力四个群体变量对合作学习型团队的学习成绩有显著的影响。团队满意感虽然与团队学习成绩显著相关,但对团队学习成绩的影响不显著。     

自尊结构研究的发展趋势

近年来,自尊结构的研究领域内出现了一些新进展,主要表现在：（1）内隐自尊研究的逐步兴起;（2）由注重总体自尊的研究到注重研究自尊的结构和具体自尊;（3）注重对自尊稳定性维度的分析研究;（4）注重对自尊结构的跨文化研究。这些都为我们理解和探讨自尊结构提供了新的观点和视角。文章综述了该研究领域的进展,并对今后的自尊结构研究作了展望。     

Fuzzy MCDM based on the concept of α‐cut

In a fuzzy multiple criteria decision‐making (MCDM) problem, with a hierarchical structure of more than two levels and involving multiple decision‐makers (DMs), to find the exact membership functions of the final aggregation ratings of all feasible alternatives is almost impossible. Thus, ranking methods based on exact membership functions cannot be utilized to rank the feasible alternatives and complete the optimal selection. To resolve the above‐mentioned complexity and to incorporate assessments of all DMs' viewpoints, in this paper a fuzzy MCDM method with multiple DMs, based on the concepts of fuzzy set theory and α‐cut, is developed. This method incorporates a number of perspectives on how to approach the fuzzy MCDM problem with multiple DMs, as follows: (1) combining quantitative and qualitative criteria as well as negative and positive ones; (2) using the generalized means to develop the aggregation method of multiple DMs' opinions; (3) incorporating the risk attitude index β to convey the total risk attitude of all DMs by using the estimation data obtained at the data input stage; (4) employing the algebraic operations of fuzzy numbers based on the concept of α‐cut to calculate the final aggregation ratings and develop a matching ranking method for proposed fuzzy MCDM method with multiple DMs. Furthermore, we use this method to survey the site selection for free port zone (FPZ) in Taiwan as an empirical study to demonstrate the proposed fuzzy MCDM algorithm. The result of this empirical investigation shows that the port of Kaohsiung, the largest international port of Taiwan as well as the sixth container port in the world in 2004, is optimal for the Taiwan government in enacting the plan of FPZ. Copyright © 2005 John Wiley & Sons, Ltd.     

The effects of personal and collective mortality salience on individualism: Comparing Australians and Japanese with higher and lower self-esteem

The cross-cultural generality of terror management theory was examined in Australia and Japan. Based on previous research suggesting that individualism is stronger in Australia than in Japan, mortality salience was predicted to enhance individualism in Australia, but to reduce it in Japan. The results supported this prediction. Consistent with the theory, the cultural pattern of worldview defense was found only among Australians and Japanese with low self-esteem. We also found preliminary evidence that collective mortality (death of one’s in-group) has a greater impact than personal mortality (personal death) in Japan. Although the cultural worldview and self-esteem may serve terror management functions in both cultures, there may be differences between cultures in the type of mortality that produces the greatest levels of anxiety and the manner in which a given worldview is used to cope with anxiety about mortality.