Chapter 12: Social Psychology

Students learn how situations exert powerful influence through social roles, group norms, and behavioral scripts, as demonstrated through landmark experimental research showing rapid adoption of assigned roles. The chapter then transitions to attitude formation and change, explaining how conflicts between beliefs and behaviors create psychological tension that motivates attitude revision, and how persuasion operates through both logical reasoning and indirect association. Group dynamics receive substantial attention, covering phenomena where individuals conform to majority positions, obey authority figures despite moral qualms, and experience shifts in decision-making when collective harmony becomes paramount. Performance in social contexts reveals paradoxical effects, with simple tasks improving under observation while complex tasks suffer, and effort declining when individual contributions blur within group settings. The chapter addresses intergroup conflict through examination of prejudicial attitudes, stereotyping processes, and discriminatory actions, while also exploring how group membership creates favoritism toward in-groups and scapegoating of out-groups. Aggression is analyzed across hostile and instrumental motivations, including modern manifestations in digital environments. The chapter concludes by examining prosocial dimensions of human connection, including empathetic helping behavior, relationship formation driven by proximity and shared characteristics, and theories explaining how people evaluate relationship sustainability through cost-benefit analysis. Throughout, the chapter emphasizes that human social behavior emerges from complex interactions between environmental contexts and individual psychology.