Includes bibliographical references (pages 186-220) and index

1. Introduction: the defining of a group ; explaining human reliance on groups; group characteristics -- 2. Social facilitation: Drive theory and social facilitation/impairment; Zajonc's mere presence hypothesis; Cottrell's learned drive view; Distraction/conflict theory; Drive theory on trial; Self-awareness theory; Theories of self-presentation and self-perception; Attentional theories -- 3. Individual versus group performance: Early research; Task, resources, and potential, Steiner's model of group performance; The experimental analysis of process loss -- 4. Group motivation losses: Social loafing; Free riding; Inequity-based motivation losses -- 5. Social influence and conformity: Social comparison theory; Conformity; Social impact theory; Groupthink; Group polarization; Minority and majority influence; Intense indoctrination -- 6. Group decision making: Social combination approaches to group decision making; Jury decision making; SDS analysis of group performance; Social communication and social combination, towards integration -- 7. Social dilemmas: Cooperation in social dilemmas, motives and determinants; Structural solutions to social dilemmas -- 8. Group aggression and intergroup conflict: Group aggression; Intergroug conflict and prejudice; The social construction of intergroup aggression; Eliciting intergroup aggression; Reduction of intergroup conflict -- 9. Stress and social support: Affliation research; The broken heart effect; Social support research; Pets as sources of social support; Explaining the relationship between social support and health; The buffering hypothesis; Can social support be harmful? -- 10. Crowding: The population problem; Animal data; Human research on task performance; Sex differences in crowding and social behavior; Crowding and altruism; Crowding and aggression; Crowding and physiology; Crowding and health; Naturalistic research with children; Mediating variables; Crowding and architecture -- 11. Concluding thoughts

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