≪Organizer Abstract≫
Human social behaviors are regulated by social norms. Although social norms are typically considered as a cultural product, evolutionary psychologists assume that we have evolved predispositions (e.g., cultural learning ability) to shape and follow social norms. In this thematic symposium, three lines of studies illustrate how the evolutionary perspective fosters our understandings of social norms. (1) The theory of indirect reciprocity assumes that people decline cooperative interactions with norm violators. The system of indirect reciprocity, however, cannot be sustained unless it allows norm violators to restore their reputation. Hiroki Tanaka will discuss norm violators' impression management strategies. (2) Naoki Konishi will discuss the importance of social sharedness of norms: People are angrier at violations of shared norms than unshared norms. (3) Third-parties sometimes incur costs to react to someone else's norm violations and compliances. Shunta Sasaki will discuss the relation of positive and negative intervention strategies (reward vs. punishment).
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