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Objective We sought to determine the accuracy of embedded performance measures for the D–KEFS Color Word Interference Test that were recently proposed by Eglit et al. In particular, we wanted to determine if these indices would be associated with a specificity of at least .90, an Area Under the Curve of at least .70 and a positive likelihood ratio of at least 2.  Method:  We used logistic regression to investigate how well these indices could distinguish persons with traumatic brain injury ( n  = 169) who were evaluated within 1-12 months after injury. All participants had been classified on the basis of at least three independent performance validity tests as valid performance ( n  = 145) or invalid performance ( n  = 24).  Results:  None of the three indices that Eglit et al. had proposed as embedded performance measures for the D–KEFS Color Word Interference Test achieved the a priori defined minimally acceptable level of specificity. One of them did meet the criteria for Area Under the Curve as well as positive likelihood ratio.  Conclusion:  The current results do not support the application of the Eglit et al. embedded performance validity measures for the D–KEFS Color Word Interference Test in the clinical evaluation of patients with traumatic brain injury.

Utility of the D–KEFS color word interference test as an embedded measure of performance validity after traumatic brain injury