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This field experiment increased the frequency of curbside recycling among community residents using feedback interventions that targeted personal and social norms. M y team of re-searchers observed curbside recycling behaviors of 605 residents of single-family dwellings for 17 weeks. Groups of contiguous houses were randomly assigned to 1 of 5 experimental conditions: plea, plea plus information, plea plus neighborhood feedback, plea plus individual household feedback, or the control condition. Interventions were implemented using door hangers delivered to each household over a 4-week period. Results showed significant increases from baseline in the frequency of participation and total amount of recycled material for the individual (i.e., personal norm) and the group feedback (i.e., descriptive norm ) interventions. None of the interventions altered the amount of contamination observed. These findings are interpreted as consistent with recent research on personal and social norms and suggest a link between behavior change produced through norm activation and behavior change produced through feedback. Implications for research and public policy are discussed.
P. Wesley Schultz (Mon,) studied this question.