Improving environmental behavior in companies - The effectiveness of tailored versus nontailored interventions

Workshop managers in garages (N = 153) received a message by mail with recommendations on how their subordinates should behave to reduce oil pollution of wastewater. The recommendations were either tailored or not tailored to the current behavior routines in each specific workshop. Tailored messages resulted in more accurate knowledge (assessed 1 week postintervention) and in more pro-environmental behavior (assessed 3 months postintervention and compared to pretest data). Tailored messages were as effective with or without additional information on behavior routines in other garages. Compared to no message (control group, n = 60), the tailored messages resulted in more pro-environmental behavior. The nontailored messages were hardly more effective than no message. The nontailored messages remained as ineffective when readers were helped (via a routing procedure) to select those parts of the message relevant to their workshop. It is concluded that tailoring is a promising new approach when campaigning for pro-environmental behavior in organizations.