Understanding Computer-Mediated Support Groups: A Revisit Using a Meta-Analytic Approach.

The increasing popularity of computer-mediated support groups (CMSGs) has drawn scholarly attention in recent decades. Fifteen empirical controlled studies have been published since Rains and Young's meta-analysis, showing mixed results, with a large variation of effect sizes ranging from -.77 to 1.33 in Cohen's d. To provide a better understanding of CMSGs, the current study meta-analyzed these 15 newly published studies along with the studies included in Rains and Young's meta-analysis, and tested study design and demographic moderators that have not been examined before. In addition, the study also revisited group size as a moderator and provided updated results with a larger sample size. Theoretical and practical implications of findings are discussed.