Factors affecting public acceptance of healthy lifestyle nudges

Abstract

In two online vignette studies, we investigated the effects of healthy lifestyle nudging and pricing interventions in two different contexts: a supermarket (Study 1) and a train station (Study 2). In Study 1 (N = 318) participants were randomly assigned to evaluate one of eight interventions described in a vignette and designed to either encourage healthier food choices or discourage unhealthy food choices in a supermarket setting. Two interventions comprised a small financial incentive to either encourage a healthy food choice or discourage an unhealthy food choice, but the other six interventions were nudges conceived to specifically impact agency, self-constitution or freedom of choice (three different aspects of autonomy). Relative to these nudges, the financial incentive interventions were not found to be less acceptable or more patronising. Overall, the encouragement of healthy food choices was rated as more acceptable and less patronising. The same pattern of results was found in Study 2 (N = 314). We conclude that interventions threatening specific aspects of one's autonomy do not necessarily affect its acceptance. However, the behavioural focus does affect intervention acceptance, that is, interventions focused on encouraging healthy choices are considered more acceptable than interventions that discourage the unhealthy option.

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