ABSTRACT
Freestanding performance validity tests serve a single purpose in assessing for negative response bias, while embedded indicators are derived from standard neurocognitive tests, and thus serve "double duty" both as measures of performance validity but also as techniques to evaluate neurocognitive function. Given that the recommendation is now to check for performance validity repeatedly during neuropsychological exams and within each cognitive domain, it is imperative to develop sound methods for interpreting the data from the various measures in combination. The chapter presents two cases which illustrate examples of differing strategies of feigning in the context of claimed mild traumatic brain injury. It addresses determination of performance validity in the context of possible dementia. The field of neuropsychology has made considerable strides in developing methods to accurately identify noncredible neurocognitive test performance, and a next important step will be to refine and perfect techniques to assist in distinguishing actual versus feigned dementia.
