We provide the following materials: 

- sketch-gallery.pdf A gallery of the final sketches produced by participants

- questionnaires-answers.xlsx An Excel spreadsheet with the data collected from the questionnaires

- analysis-time/ R code for generating Figure 4 from the supplemental material and R code for conducting the analysis reported in supplemental, Section 2.2. We also include the output generated by the script.

- analysis-subjective/ R code for generating Figure 9