A Meta-Analysis of Workplace Interventions for Pro-Environmental Behaviour

Objective: This meta-analysis evaluates the effectiveness of workplace interventions in promoting pro-environmental behaviour and examines potential moderating factors. Methods: We synthesised 308 effects from 45 studies using random-effects meta-analytic models, with robust variance estimation to account for dependencies and high heterogeneity. Moderation analyses were conducted to assess the influence of intervention types (e.g., information provision, personalised intervention, collective framing). Results: Workplace interventions demonstrated a significant small-to-moderate positive effect on pro-environmental behaviour (Hedges’ g = 0.347, p < .001). No evidence of publication bias was found, and the effect remained robust after bias-correction and outlier exclusion. However, no significant moderation effects were detected, and substantial heterogeneity (I² = 96.17%) indicates considerable variability across studies. Conclusion: While this meta-analysis provides robust evidence for the effectiveness of workplace interventions, the variability in outcomes calls for further investigation into potential moderators. A detailed discussion of these findings and their implications for theory and practice will follow.