The responsive bystander: how social group membership and group size can encourage as well as inhibit bystander intervention.

  title={The responsive bystander: how social group membership and group size can encourage as well as inhibit bystander intervention.},
  author={Mark Levine and Simon Crowther},
  journal={Journal of personality and social psychology},
  volume={95 6},
  • M. LevineS. Crowther
  • Published 1 December 2008
  • Psychology
  • Journal of personality and social psychology
Four experiments explored the interaction of group size, social categorization, and bystander behavior. In Study 1, increasing group size inhibited intervention in a street violence scenario when bystanders were strangers but encouraged intervention when bystanders were friends. Study 2 replicated and extended these findings to social category members. When gender identity was salient, group size encouraged intervention when bystanders and victim shared social category membership. In addition… 

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