McCullough, Kilpatrick, Emmons, and Larson (2001) posited that gratitude prompts individuals to behave prosocially. However, research supporting the prosocial effect of gratitude has relied on scenario and self-report methodology. To address limitations of previous research, this experiment utilised a laboratory induction of gratitude, a method that is potentially more covert than scenarios and that elicits actual grateful emotion. Prosocial responses to gratitude—operationalised as the distribution of resources to another—were paired with a self-report measure of gratitude to test the prosocial effect (...) of gratitude. To investigate positive mood as an alternative explanation, this experiment compared responses of individuals receiving a favour to responses of individuals receiving a positive outcome by chance. A total of 40 participants were randomly assigned to either a Favour or Chance condition. Participants receiving a favour helped more and reported more gratitude compared to participants in the Chance condition. (shrink)