Regression coefficients for controversial themes as a function of research areas. For tables of full numeric results, see Supplementary Tables 2 – 5. Cells marked ‘x’ are non-significant (with Bonferroni correction for multiple comparisons—the number of cells in each panel—yielding thresholds P < 0.000208 for a). All continuous variables are z-scored. Plot margins show hierarchical clusters (Ward’s method).