We assessed whether each article (1) discussed genetic causes of health-related racial differences (kappa = .92); whether the article (2) resembled the Backdoor Vignette on a scale from 1 (very dissimilar) to 7 (very similar to the vignette), dichotomized as resembling (rating of 4 or higher) or not resembling (rating of 3 or lower) the vignette (kappa = .74); (3) mentioned racism, prejudice, or similar concepts (definitely yes = 2, possibly yes = 1, definitely no = 0; intra-class correlation (ICC) = .88); (4) discussed ethical concerns, such as discrimination, prejudice, stereotyping, or eugenics (2 = definitely yes, 1 = possibly yes, 0 = definitely no; ICC = .78); and (5) endorsed genetic causes of the racial difference in question (1 = all statements refute genetic causation; 2 = most statements refute genetic causation, although endorsing statements are included; 3 = neutral; 4 = most statements endorse genetic causation, although refuting statements are included; 5 = all statements endorse genetic causation; ICC = .66).
