Additional file 1. Supplementary Table 1. Survey items. Supplementary Table 2. Descriptive statistics for level 1 variables (instructors; n = 2,382). Supplementary Table 3. Descriptive statistics for level 2 variables (department; n = 1,405). Supplementary Table 4. Correlations among the variables at level 1 (instructors; n = 2,382). Supplementary Table 5. Correlations among the variables at level 2 (department; n = 1,405). Supplementary Table 6. Variance inflation factors (VIF) on the standardized model.