Anna Steidle, Eva-Verena Hanke, Lioba Werth

• Grounded and embodied cognitions have gained increasing interest in explaining the effects of the physical environments on social cognition and behavior. However, the very nature of the processes underlying embodiment is largely unknown. The current research aims at contributing to this issue by (1) differentiating between the embodiment of contents and procedures, (2) unfolding the processes underlying mechanism of an embodied procedure, and (3) showing its boundary conditions. Seven experiments investigated these refinements using the examples of darkness, self-construal, and cooperation in social dilemmas. The results provided consistent evidence that darkness triggers interdependent self-construal, which in turn promotes cooperation. Moreover, the individual's internal context and external context moderated the darkness-cooperation effect. These results contribute to the understanding of embodied and situated social cognition and behavior and provide a consistent explanation for the mixed findings of lighting on cooperation in particular and prosocial behavior in general.