“…2Following Meehl and Rosen (1955), expository writing on diagnostic efficiency for psychologists often notes that in cases where the BR is extremely low or high, use of the test may result in a lower CF than does “betting the base rate” (i.e., always predicting that the respondent is a member of the modal population; Hsu, 1985; Waller, Yonce, Grove, Faust, & Lezenweger, 2006). Although this is technically true, betting the BR is unacceptable in applied settings for very practical reasons.…”