From conference paper due imminently ... more to come anon
2.1. Inference strategy
This paper rests on a simple theoretical premise: that rejection of a “null hypothesis” with respect to the correlation between pathogen disgust sensitivity, on the one hand, and GM-food and vaccine risk perceptions, on the other, is not sufficient to support the conclusion that disgust sensitivity meaningfully explains these risk perceptionss. Like all valid latent variable instruments, any scale used to measure pathogen disgust sensitivity will be imperfect. Such a scale will be highly correlated with, and thus reliably measure, a particular form of disgust sensitivity. But such a scale can still be expected to be weakly or even modestly correlate with additional negative affective dispositions. As a result, there can be modest yet practically meaningless correlations between the pathogen disgust sensitivity scale and all manner of risk perceptions that excite negative affective reactions unrelated to disgust.
A comparative analysis is thus appropriate. If disgust genuinely explains perceived risks over vaccines and GM foods, the relationship between a valid measure of pathogen disgust (PD) and those putative risk sources should be comparable to the relatively large ones between PD and attitudes one has good reason to believe are grounded in disgust. By the same token, if the correlation between the measure of PD and GM-food and vaccine risk perceptions, respectively, is comparable in magnitude to ones between the PD measure and putative risk sources that do not plausibly excite disgust, then there will be less reason to conclude that pathogen disgust sensitivity does not play an important role in explaining differences in the perceived risk of GM foods and vaccines.
This was the inference strategy that informed design of this study....