The Effect of a Default Nudge on Experienced and Expected Autonomy: A Field Study on Food Donation

Default nudges—making the desired option the standard option—are often criticized for hampering autonomy. However, laboratory research suggests this expectation of autonomy loss is not reflected in nudgees' experienced autonomy. In this study, we investigated whether this finding translates to a real-world setting by implementing a default nudge to increase food donations in the supermarket (Experiment 1). Upon entering the supermarket, customers were asked to donate a food item for charity and were handed a shopping cart/basket that was empty (control) or contained a food item meant for donation (default nudge). Donations were collected after checkout, and customers rated their experienced autonomy of their choice to donate. We replicated this study and added a vignette condition portraying the default nudge to measure expected autonomy for the same situation (Experiment 2). The results show the default nudge reduced participants' expected autonomy but not their experienced autonomy, shedding new light on the relation between nudging and autonomy. Furthermore, this novel form of the default nudge was found to be successful in increasing food donations in the supermarket, further expanding the field where this nudge has been successful.