Intentions, efficacy, and norms: The impact of different self-regulatory cues on reducing engine idling at long wait stops

Mahmood, L. ORCID: 0000-0002-8433-1637, Abrams, D., Meleady, R. , Hopthrow, T., Lalot, F., Swift, H. & Van de Vyver, J. (2019). Intentions, efficacy, and norms: The impact of different self-regulatory cues on reducing engine idling at long wait stops. Journal of Environmental Psychology, 66, 101368. doi: 10.1016/j.jenvp.2019.101368

Abstract

Idling engines contribute significantly to air pollution and health problems. In a field study at a busy railway crossing we used the Theory of Planned Behavior to design persuasive messages to convince car drivers (N = 442) to turn off their engines during long wait stops. We compared the effects of three different messages (focusing on outcome efficacy, normative reputation, or reflection on one's intentions) against a baseline condition. With differing effectiveness, all three messages had a positive effect compared with the baseline. Drivers were most likely to turn off their engines when the message focused on outcome efficacy (49%) or reflection (43%), as compared to the baseline (29%). The increased compliance in the normative reputation condition (38%) was not significantly different from baseline. Thus, stimulating self-regulatory processes, particularly outcome efficacy, is demonstrated to have a positive effect on pro-environmental driving behavior. Theoretical and practical implications are discussed.

Publication Type:	Article
Subjects:	H Social Sciences > HE Transportation and Communications H Social Sciences > HM Sociology T Technology > TF Railroad engineering and operation
Departments:	School of Health & Psychological Sciences > Psychology