Using a willingness to wait design to assess how readers value text

The Central Ethics Committee at Royal Holloway, University of London, reviewed and approved this study [ethical approval code: 2543-2021-02-05-17-21-PJJT001]. All participants provided written informed consent at the start of the experiment.

Determination of sample size

A power analysis using the SimR³⁰ package was used to determine the sample sizes for Experiment 1 and Experiment 2. To determine the power for Experiment 1, we used data from a pilot study (n = 23) which employed a similar, but not identical, design. This analysis indicated that willingness to take on a cost was a large…