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Additional file 1: Figure S1. Histograms of pre- and post- discomfort scores for each year of the study. Figure S2. Pearson correlations between the pre-class and post-class scores and human evolution acceptance measures using listwise-deletion data. Figure S3. Observed TTCI Pre- scores (blue) and imputed values for the 100 datasets (red). Figure S4. Observed TTCI Post- scores (blue) and imputed values for the 100 datasets (red). Figure S5. Observed Relevance (course)scores (blue) and imputed values for the 100 datasets (red). Figure S6. Observed Relevance (lesson) scores (blue) and imputed values for the 100 datasets (red). Figure S7. Observed Engagement (course) scores (blue) and imputed values for the 100 datasets (red). Figure S8. Observed engagement (lesson) scores (blue) and imputed values for the 100 datasets (red). Figure S9. Observed Discomfort (course) scores (blue) and imputed values for the 100 datasets (red). Figure S10. Observed Discomfort (lesson) scores (blue) and imputed values for the 100 datasets (red). Figure S11. Distribution of imputed TTCI scores for 100 datasets (red) compared to observed scores (blue). Figure S12. Distribution of imputed Relevance scores for 100 datasets (red) compared to observed scores (blue). RelPre refers to perceived relevance of the course content and RelPost refers to perceived relevance of the lesson content. Figure S13. Distribution of imputed Engagement scores for 100 datasets (red) compared to observed scores (blue). EngPre refers to engagement with the course content and EngPost refers to Engagement with the lesson content. Figure S14. Distribution of imputed Discomfort scores for 100 datasets (red) compared to observed scores (blue). DiscPre refers to discomfort with the course content and DiscPost refers to discomfort with the lesson content. Table S1. Frequency of missing data patterns. Table S2. Main effects model results for student post-test TTCI scores. Table S3. Main effects model results for student reported engagement and content relevance during the one-day activity. Table S4. Full model results for student reported discomfort experienced during the one-day activity.

Additional file 1. Supplemental methods and results.