CVLT-3 response bias as an indicator of performance validity in a litigating population.

ABSTRACT

This study examined the efficacy of CVLT-3 response bias (i.e., parametric and nonparametric response bias) indices in differentiating between a clinical sample with traumatic brain injury and a litigating sample with poor performance validity.Participants included 106 individuals, divided into two groups clinical group with TBI (n = 56) and a litigating group who demonstrated inadequate performance validity (n = 50), as measured by failure on at least two performance validity tests. Archival CVLT-II data was rescored utilizing the CVLT-3 scoring and normative data. Receiver operator characteristic (ROC) curve analysis was used to evaluate the diagnostic discriminability of the two response bias indices.Both parametric and nonparametric bias indices showed acceptable levels of diagnostic discrimination AUC = .791 for parametric response bias and AUC = .753 for nonparametric response bias.Parametric response bias' discrimination was statistically superior to the nonparametric responses bias' discrimination. The CVLT-3 response bias score demonstrated good sensitivity and specificity when differentiating between individuals in a clinical sample with TBI and individuals in litigation who demonstrated inadequate performance validity.