会員の皆さま
大阪公立大学大学院文学研究科心理学教室の橋本博文と申します。7月17日（木）に以下の要領でセミナーを開催いたします。ご関心をお持ちの方は、ぜひご参加いただけますと幸いです。
【日時】2025年7月17日（木）16:30～18:30
【会場】大阪公立大学 梅田サテライト（ホール）
（〒530-0001 大阪府大阪市北区梅田１丁目２−２−６００ 大阪駅前第２ビル 6F）
【話者】Dr. Hirotaka Imada (Royal Holloway, University of London) & Prof. Motoki Watabe (Sunway University)
【発表タイトル・要旨】
Hirotaka Imada
Title: Climate change as an inherently intergroup issue: intergroup cooperation in intergenerational social dilemmas
Abstract: Issues related to sustainability (e.g., climate change) often manifest themselves as intergenerational social dilemmas, where people are faced with a choice between self-serving, unsustainable behaviour and sustainable, personally costly behaviour. Extending the previous literature on (nonintergenerational) intergroup cooperation, we tested whether group membership of the future generations influenced sustainable decision making. In two preregistered studies using the intergenerational sustainability dilemma game, we found that individuals were more likely to make a sustainable (vs. selfish) decision when they believed that their current behaviours would benefit future ingroup members, whereas more selfish decisions were made when benefits would accrue to outgroup members. These findings held in both the minimal group and national group contexts. The results suggest that efforts to promote sustainability by highlighting benefits to outgroup members may backfire. The results will be discussed in relation to the broader literature on ingroup favouritism in (nonintergenerational) social dilemmas and the implications for designing more effective climate communication strategies.
Motoki Watabe & Daisuke Nakama
Title: Team Membership Fluidity Sustains Organizational Citizenship Behavior in Cooperative Climate: Evidence from Agent-based Simulation and Workplace Survey
Abstract: Organizational Citizenship Behavior (OCB) is vital for collective success. However, its long-term sustainability in repeated interactions holds a theoretical challenge, particularly when viewed through the lens of evolutionary models of cooperation where OCB can be seen as a cooperation in a social dilemma. Integrating this evolutionary perspective with social exchange theory, we investigate how cooperative climate and team membership fluidity jointly influence the persistence of OCB. We propose that a cooperative climate, which fosters the perception of personal benefits from OCB, becomes more effective in sustaining collective OCB when team membership fluidity is high. We tested this proposition through a two-study design. Study 1, an agent-based evolutionary simulation, revealed that OCB persists only when it is personally beneficial, and its long-term prevalence is significantly enhanced by high team fluidity in such beneficial environments. Study 2, a confirmatory field study with 222 managers, empirically replicated this crucial interaction: a strong cooperative climate was positively associated with collective OCB sustainability, and this association was substantially stronger when team membership fluidity was high. Our findings highlight that fluidity is not inherently beneficial but rather acts as a moderator, realizing the positive impact of a cooperative climate by allowing cooperators to escape exploitation in a fixed relationship. This research contributes to OCB and organizational dynamics literature by offering a novel, multi-method explanation for OCB sustainability and provides practical implications for fostering prosocial behavior in dynamic organizational structures.
【使用言語】英語（ただし質問やコメント等は日本語でしていただいても結構です）
【お問い合わせ先】大阪公立大学大学院文学研究科心理学教室 橋本博文
e-mail: hirofumihashimoto@outlook.com
tel: 06-6605-2376
イベントページ: https://sites.google.com/view/hirofumihashimotolab/top/event
なお、セミナー終了後には懇親会も予定しています。懇親会にご参加を希望される方は、7月13日（日）までに橋本（hirofumihashimoto@outlook.com）までご連絡いただけますと幸いです。