Replication Data for: Personality and Prosocial Behavior: A Multilevel Meta-Analysis

We investigate the effect of personality on prosocial behavior in a Bayesian mul- tilevel meta-analysis (MLMA) of 15 published, interdisciplinary experimental stud- ies. With data from the 15 studies constituting nearly 2,500 individual observations, we find that the Big Five traits of Agreeableness and Openness are significantly and positively associated with prosocial behavior, while none of the other three traits are. These results are robust to a number of different model specifications and operational- izations of prosociality, and they greatly clarify the contradictory findings in the liter- ature on the relationship between personality and prosocial behavior. Though previ- ous research has indicated that incentivized experiments result in reduced prosocial behavior, we find no evidence that monetary incentivization of participants affects prosocial tendencies. By leveraging individual observations from multiple studies and explicitly modeling the multilevel structure of the data, MLMA permits the si- multaneous estimation of study- and individual-level effects. The Bayesian approach allows us to estimate study-level effects in an unbiased and efficient manner, even with a relatively small number of studies. We conclude by discussing the limitations of our study and the advantages and disadvantages of the MLMA method.