Abstract

Mental contrasting with implementation intentions is a self-regulation strategy that enhances goal attainment. This meta-analysis evaluated the efficacy of MCII for goal attainment and explored potential moderators. A total of 21 empirical studies with 24 independent effect sizes were included in the analysis. Results showed that MCII to be effective for goal attainment with a small to medium effect size. The effect was mainly moderated by intervention style. Specifically, studies with interventions based on interactions between participants and experimenters had stronger effects than studies with interventions based on interactions between participants and documents. The results revealed that MCII is a brief and effective strategy for goal attainment with a small to moderate effect; however, because of some publication bias, the actual effect sizes may be smaller. Due to small number of studies in this meta-analysis, additional studies are needed to determine the role of moderator variables.