In eusocial insects, the ability to discriminate nest-mates from non-nest-mates is widespread and ensures that altruistic actions are directed towards kin and agonistic actions are directed towards non-relatives. Most tests of nest-mate recognition have focused on hymenopterans, and suggest that cooperation typically evolves in tandem with strong antagonism towards non-nest-mates. Here, we present evidence from a phylogenetically and behaviourally basal termite species that workers discriminate members of foreign colonies. However, contrary to our expectations, foreign intruders were the recipients of more rather than less cooperative behaviour and were not subjected to elevated aggression. We suggest that relationships between groups may be much more peaceable in basal termites compared with eusocial hymenoptera, owing to energetic and temporal constraints on colony growth, and the reduced incentive that totipotent workers (who may inherit breeding status) have to contribute to self-sacrificial intergroup conflict.

This study uses a longitudinal case study approach to observe change in ‘US and THEM-thinking’. Its purpose is to increase awareness of identity processes among participants and to test if the Attitude-Behaviour-Context-Triangle (the ABC-triangle) may be a way to achieve that. The ABC-triangle is modified as an ‘identity-analysis tool’ rather than a ‘conflict-analysis tool’.               Aspects relating to recognition of multiple identity affiliations compared to singular-identity categorisation is of interest. The traditional identity theories suggest that high identity salience increase singular-identity categorisation and thereby increase positive emotions for ingroup and negative emotions for outgroup. This study is partly based on the social identity perspective but complements it with Thoits’ identity-accumulation hypothesis and Hogg’s uncertainty-identity theory. Hogg’s theory locates uncertainty reduction as a main contributor to singular-identity categorisation together with its’ implied negative consequences. Hogg’s solutions are located both in multiple identity affiliations, as do Thoits, and in perceived cognitive ability to deal with uncertainty. This study emphasises awareness of identity processes to be the single most important factor for decreasing negative views of ‘THEM’. Overlooked in the more dominant theories of this area, it finds that recognition of multiple identity affiliations influences the perceived singular-identity terms imposed by an ‘US and THEM-situation’. Thereby, challenging imposed identity-restrictions and perceived intergroup competition. Furthermore, it questions the theoretical importance given to identity salience in previous research and theories since high identity salience, in this case, does not equal a singular-identity categorisation or increase negative views of ‘others’.

The primary purpose of this study was to explore the challenges and benefits associated with cultural diversity within groups. The research hypotheses were proposed to test the effects of cultural diversity on group performance and group processes by comparing culturally diverse and culturally homogeneous groups under conditions of intergroup competition and noncompetition. This experiment was conducted using 500 upper-level undergraduates enrolled in the principles of management course for the fall semester.

付記する学位プログラム名: 霊長類学・ワイルドライフサイエンス・リーディング大学院 / 京都大学 / 新制・課程博士 / 博士(理学) / 甲第24828号 / 理博第4977号 / 新制||理||1710(附属図書館) / 京都大学大学院理学研究科生物科学専攻 / (主査)准教授 山本, 真也, 教授 平田, 聡, 教授 村山, 美穂 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DGAM

Représentant entre 10 et 12 millions d’individus en Europe, les Roms sont confrontés à des discriminations et à l’exclusion sociale. 40% des Européens refusent d’avoir des Roms comme voisins, alors que 70% de ceux-ci n’entretiennent même pas de contact direct avec eux dans leur vie. Face à la problématique qu’offrent ces statistiques, cette étude entend observer les mécanismes de construction des attitudes envers les Roms. Je propose d’analyser la production de ces attitudes au sein de deux milieux similaires, mais où les politiques d’intégration locales envers les Roms divergent, rendant ainsi les conditions des contacts intergroupes différent. Cette analyse part des postulats scientifiques selon lesquels l’intégration des migrants est un enjeu d’action publique locale, et que les interactions sociales de qualité structurent les attitudes des uns par rapport aux autres. Ainsi, à partir d’entrevues semi-dirigées réalisées dans les communes françaises de La Courneuve et d’Ivry-sur-Seine, je teste de manière empirique quatre théories dominantes dans le domaine des relations intergroupes: la théorie du contact, l’effet halo, l’impact des politiques locales d’intégration des immigrants et l’influence des médias. / Representing between 10 and 12 million individuals in Europe, the Roma population faces discrimination and social exclusion. 40% of Europeans refuse to have Roma as their neighbors, while 70% of them do not even have direct contact with them in their lives. Based on these observations, this study analyses how attitudes towards Roma are constructed. I propose to investigate this mechanism in two similar environments, but where local integration policies towards Roma diverge, making the conditions of intergroup contact differ. The analysis is premised on two scientific assumptions: that the integration of migrants is a local public policy issue; and that intergroup contact structures attitudes between majority and minority cultures. Thus, from semi-structured interviews in the French communes of La Courneuve and Ivry-sur-Seine, I empirically test four dominant theories in the field of intergroup relations: contact theory, the halo effect, the impact of local immigrants integration policies, and media influence.

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