Red flags in the clinical interview may forecast invalid neuropsychological testing

Area of Science:

• Neuropsychology
• Forensic Psychology
• Trauma Research

Background:

• Evaluating assessment validity is crucial in neuropsychological evaluations, especially with potential secondary gain like malingering or somatization.
• Research on the validity of self-report during clinical interviews is limited, contrasting with standalone and embedded validity measures.
• Mild traumatic brain injury (mTBI) cases involving litigation present unique challenges for assessing genuine cognitive impairment.

Purpose of the Study:

• To investigate the hypothesis that inconsistent self-reported details of injury predict invalid performance on neurocognitive tests in litigation-involved mTBI patients.
• To determine if discrepancies in reported date of injury (DOI) and/or loss of consciousness (LOC) correlate with performance validity testing (PVT) failures.

Main Methods:

• An archival study analyzed data from litigation-involved mTBI patients at an outpatient neuropsychology practice.
• Data included demographic variables, performance validity measures, and consistency checks between self-report and medicolegal records.
• Statistical analyses examined the relationship between self-report consistency and PVT scores.

Main Results:

• A significant association was found between self-report consistency and performance validity testing (X²(1, N=84) = 24.18, p < .01, Φ = .49).
• Inconsistently reported DOI correlated with the number of PVTs failed (r(83) = .49, p < .01).
• Using inconsistent LOC and/or DOI correctly identified invalid performance with 75% sensitivity and 75% specificity.

Conclusions:

• Examinees with discrepancies between reported DOI/LOC and medical records are more likely to fail PVTs.
• This finding suggests potential symptom exaggeration or underperformance on cognitive assessments.
• Inconsistent self-reported injury details serve as a potential indicator of invalidity in mTBI evaluations.