Fig. 3

Example participant logistic regression curves. (A,B) Logistic regression curves for “task vs no effort” choices of a representative participant for update (A) and ignore (B) condition. The probability of accepting the “no effort” (i.e. no task) offer (y-axis) is plotted as a function of the amount of money offered for “no effort” (x-axis). Task offer was always €2 for both conditions and all set sizes and the “no effort” offer varied from €0.10 to €2.20. The estimated indifference point is the offer for “no effort” where the probability of choosing to do the task or the “no effort” option is equal (i.e., 0.5). Indifference points decreased with increasing set size. (C,D) Example logistic regression curves for “ignore vs update” indifference points. The probability of choosing the update offer is shown to vary as a function of the amount of money offered for update. Ignore offer was always €2 for all set sizes, while the update offer varied from €0.10 to €4. The indifference point is the update offer for which the acceptance probability is 0.5, i.e., subjective equivalence. (C) Representative participant who discounted rewards in order to avoid ignore trials (preference for update). (D) Example participant who discounted rewards in order to avoid the more demanding levels of update trials (preference for ignore).