Michaelsen, Johansson, and Hedesström (2021) on Experiencing Default Nudges

Patrik Michaelsen, Lars-Olof Johansson, and Martin Hedesström, “Experiencing Default Nudges: Autonomy, Manipulation, and Choice-Satisfaction as Judged by People Themselves.” Behavioural Public Policy, First View, 1–22, 19 March 2021. 

• This article examines how people feel about default nudges, especially with respect to their perception of their autonomy and their satisfaction with their ultimate choice. "We present three experiments (total N = 2083) where participants are subjected to opt-out default nudges and compared with participants subjected to opt-in or a no-default active-choice format [pages 3 and 4]."

• Study 1: MTurk folks consider whether to have “green” (and slightly more expensive) appliances in their (imaginary) new flats. There are three conditions: green (environmentally friendly) default (opt out); non-green default (opt-in); and active choice.

• The effect of the default is big, with about twice as many green appliances chosen with opt-out relative to opt-in; active choice leads to more green appliances than opt-in, too, but not as much more as opt-out.

• Participant ratings of their autonomy, satisfaction, and perceived threat to their choice freedom do not differ based on the condition. In particular, the opt-out default, which produces greener choices, does not lead to participant dissatisfaction.  

• Study 2 replicates study 1, but with a twist: now, half of the participants ae told about the default or active choice, and how default nudges are expected to influence choices. How does making the nudge transparent affect its influence on choices and satisfaction?

• It turns out that lots of participants don’t really understand the explanation of how the default nudge is supposed to work.

• The large impact on choosing green appliances from the opt-out default is replicated – and nudge transparency does not change that.  

• The participants give high ratings across-the-board for autonomy, but opt-out folks report slightly higher experienced autonomy and satisfaction than do their opt-in brethren.

• Study 3 aims to raise the stakes (slightly). Participants receive a 20 cent bonus, on top of the 50 cents they are paid to take part.  But they are given an opportunity to donate their bonus to a charity. The opt-out condition is where the bonus is defaulted to the charitable contribution. 

• Defaults continue to have consequences: opt-out folks are more likely to donate than are opt-in; active choice is in the middle; the three conditions have no effect on feelings of autonomy.

• With disclosure (and understanding), opt-in and active choice donations go up. (Again, the number of participants who do not understand the disclosure is fairly staggering.)

• Opt-out folks view the set-up as more threatening to freedom of choice, and full transparency raises everyone's view of such a threat – but despite that threat, people aren't really worked up over it.