Abstract
Recycling behaviours are essential for improving resource efficiency and reducing environmental pollution caused by waste disposal. Behavioural interventions, as low-cost and effective nonregulatory approaches, have been widely used to promote recycling. In this paper, we comprehensively evaluate the effect of behavioural interventions through a preregistered meta-analysis (a total of 206 effect sizes were collected, covering 1167,069 samples). We find that, overall, interventions have small to moderate effects (Fisher's z = 0.195; 95% CI 0.141,0.249). Among the different approaches, education, environmental alteration and campaign interventions can achieve better effects (Fisher's z ≥ 0.2), while incentives and commitment have weaker effects (Fisher's z < 0.2). The duration and context of the intervention had no significant effects (p < 0.1). We emphasize the need for behavioural interventions to highlight the role of social interactions and to enhance waste recycling practices.
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