To assess whether our results held for both the New York Times and Associated Press, we conducted time-trend analyses separately for each. Increases in each type of article were somewhat larger in the New York Times but not significantly so. Despite the smaller number of articles for analyses broken down by source (N = 110 for the New York Times and 79 for the Associated Press), increases in the number of health-related articles remained statistically significant for both sources; however, the increase in the number of articles resembling the Backdoor Vignette was significant only at the .10 level for the lower-powered Associated Press analysis. Results for mentions of racism, discussion of ethical issues, and endorsement of genetic cause did not differ significantly by source.
