The sample size was 242. If you click the link to the paper, then click the supplementary material link, you get [this pdf](https://static-content.springer.com/

The sample size was 242. If you click the link to the paper, then click the supplementary material link, you get [this pdf](https://static-content.springer.com/esm/art%3A10.1007%2Fs11109-016-9373-5/MediaObjects/11109_2016_9373_MOESM1_ESM.pdf https://static-content.springer.com/esm/art%3A10.1007%2Fs111...) that explains the methods.