In spite of the growing availability of COVID-19 vaccines, a substantial number of people is reluctant or uncertain about getting the vaccine. Nudges may improve vaccine uptake but it is unclear... Show moreIn spite of the growing availability of COVID-19 vaccines, a substantial number of people is reluctant or uncertain about getting the vaccine. Nudges may improve vaccine uptake but it is unclear how this plays out with the experience of autonomous choice, decision competence, decision satisfaction, and being pressured to make a choice. In an online experiment among a representative sample (N = 884), we examined whether a social norm nudge or a default nudge (either or not transparent) was effective in steering the desired choice of making a hypothetical early vaccination appointment as compared to making a later appointment or no appointment. We also examined how both nudges affected autonomy and related downstream consequences. None of the nudges proved effective in making the desired choice of early vaccination and neither did they impact on downstream consequences. Rather, our results indicate that participants who were certain about their choice (i.e., opted for the earliest available vaccination opportunity or not getting vaccinated at all) reported higher levels of autonomy, competence and satisfaction than participants who did not know yet about vaccination or who postponed the moment of getting their vaccination. We conclude that the experience of autonomy and related downstream consequences is determined by having made up one's mind about vaccination, and is not affected by attempts to nudge the individual. Show less
Wachner, J.; Adriaanse, M.; Hoven, M. van den; Ridder, D. de 2022
Defaults have been shown to increase the number of organ donor registrations but it is unclear whether they violate personal autonomy of the people being registered. The implementation of a new... Show moreDefaults have been shown to increase the number of organ donor registrations but it is unclear whether they violate personal autonomy of the people being registered. The implementation of a new Donor Act in the Netherlands, providing people with the opportunity for active registration before being defaulted, allowed for examining to what extent default registration affects personal autonomy and associated concepts. In an online survey among a representative sample (N = 1259), four groups were compared regarding autonomy, decision -making competence, decision satisfaction, and being pressured to register as a donor: people (1) who had registered their status prior to the Donor Act, (2) who had not yet received an invitation for default registration, (3) who had received an invitation and then registered their choice, and (4) who had received an invitation but took no action and were defaulted into donor registration. We found that among the three groups who were the target population of the new arrangement, people who registered their status reported relatively high levels of autonomy and related concepts. However, people who were invited to register but passed the opportunity to respond reported lower scores on these outcomes. We conclude that default organ donation registration may bear negative consequences for a minority of people who feel unable to take action after having been invited to make a choice for registration.Superscript/Subscript Available Show less
Wachner, J.; Adriaanse, M.A.; Hoven, M.; Ridder, D. de 2022
People repeatedly encounter response conflicts (i.e., self-control dilemmas between long-term and short-term goals). A longitudinal study was conducted to investigate how resolution of response... Show morePeople repeatedly encounter response conflicts (i.e., self-control dilemmas between long-term and short-term goals). A longitudinal study was conducted to investigate how resolution of response conflict develops over time. Participants pursued a long-term goal. The design entailed pre- and post-measurements, as well as daily/weekly measures using a mobile application over a range of 10–110 days. Of the 180 people participating in the pre-measurement, 90 also completed the post-measurement. Over time, people became faster at successfully resolving response conflicts. The same response conflicts became bigger over time. Repeatedly being confronted with response conflicts facilitates resolution of these conflicts, by improving the identification of these conflicts, resulting in faster resolution. Show less
Weiden, A. van der; Benjamins, J.; Gillebaart, M.; Ybema, J.F.; Ridder, D. de 2020
When striving for long-term goals (e.g., healthy eating, saving money, reducing energy consumption, or maintaining interpersonal relationships), people often get in conflict with their short-term... Show moreWhen striving for long-term goals (e.g., healthy eating, saving money, reducing energy consumption, or maintaining interpersonal relationships), people often get in conflict with their short-term goals (e.g., enjoying tempting snacks, purchasing must-haves, getting warm, or watching YouTube video’s). Previous research suggests that people who are successful in controlling their behavior in line with their long-term goals rely on effortless strategies, such as good habits. In the present study, we aimed to track how self-control capacity affects the development of good habits in real life over a period of 90 days. Results indicated that habit formation increased substantially over the course of three months, especially for participants who consistently performed the desired behavior during this time. Contrary to our expectations, however, self-control capacity did not seem to affect the habit formation process. Directions for future research on self-control and other potential moderators in the formation of good habits are discussed. Show less
