The Rey Dot Counting Test as a Tool for Detecting Suboptimal Performance in Athlete Baseline Testing.

Objective The limitations of Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)'s embedded validity measures (EVMs) are well-documented, as estimates suggest up to 35% of invalid baseline performances go undetected. Few studies have examined standalone performance validity tests (PVT) as a supplement to ImPACT's EVMs. Method College athletes (n  = 1,213) were administered a preseason baseline assessment that included ImPACT and the Rey Dot Counting Test (DCT), a standalone PVT, among other measures. Results Sixty-nine athletes (5.69%) met criteria for suboptimal effort on either ImPACT or the DCT. The DCT detected more cases of suboptimal effort (n  = 50) than ImPACT (n  = 21). A χ2 test of independence detected significant disagreement between the two measures, as only two individuals produced suboptimal effort on both (χ 2(2) = 1.568, p  = .210). Despite this disagreement, there were significant differences between the suboptimal effort DCT group and the adequate effort DCT group across all four ImPACT neurocognitive domains (U  = 19,225.000, p  < .001; U  = 17,859.000, p  < .001; U  = 13,854.000, p  < .001; U  = 17,850.500, p  < .001). Conclusions The DCT appears to detect suboptimal effort otherwise undetected by ImPACT's EVMs. [ABSTRACT FROM AUTHOR]