Social identity and health-related behavior: A systematic review and meta-analysis

This paper examined the relationship between social identity and health-related behavior, exploring whether social identities are associated with multiple health-related behaviors or only specific ones, and whether this association varies on the type of social identity, the type of social identity measures or the expected relationship between identity and behavior. In a systematic review and meta-analysis we assessed whether the pattern of findings can be explained by the social identity approach. An extensive literature search was conducted in several databases including EBSCO-host and PubMed, using elaborate search terms related to social identity and healthrelated behavior. This resulted in 10728 potential articles, with 115 articles (with 248 effect sizes from 133 independent samples, N = 112.112) included in the meta-analysis. We found a small but positive overall association between social identification and health-related behavior, which was present for actual behavior, as well as for intention and attitudes. This association was stronger for health-related social identities, positive healthrelated behaviors, when the expected relationship was positive and when indirect social identity measures were used. However, not all findings could be explained by the social identity approach, indicating a need for further research to better understand the relationship between social identity and health-related behavior, in order to more effectively incorporate social identity into health interventions.