Malleability of Statistical Perception: Impact of Validity Presentation on College Admission Test Policy Preferences

Research evidence in the social sciences often relies on effect size statistics, which are hard to understand for the public and do not always provide clear information for decision-makers. One area where interpretation of research evidence has profound effects on policy is college admission testing. In this paper, we conducted two experiments testing how different effect size presentations affect validity perception and policy preferences toward standardized admission tests (e.g., ACT, SAT). We found that compared to traditional effect size statistics (e.g., correlation coefficient), participants perceived admission tests to be more predictively valid when the same evidence was presented using an alternative effect size presentation. The perceived validity of the admission test was also positively associated with admission test policies (e.g., test-optional policy) preferences. Our findings show that policy preferences toward admission tests depend on the perception of statistical evidence, which is malleable and depends on how evidence is presented.