Cognitive "success" in the setting of performance validity test failure

Area of Science:

• Neuropsychology
• Traumatic Brain Injury Research
• Cognitive Assessment

Background:

• Interpreting cognitive data is challenging when performance validity tests (PVTs) indicate invalid performance.
• Previous studies highlight variance from performance invalidity, necessitating further examination of cognitive outcomes in this context.

Purpose of the Study:

• To examine cognitive outcomes in veterans with mild traumatic brain injury (TBI) who exhibit failed performance validity tests (PVTs).
• To assess the utility of neurocognitive data despite poor PVT results and its implications for functional abilities.

Main Methods:

• 222 veterans with mild TBI history underwent cognitive and performance validity testing.
• Cognitive scores were categorized as Within Normal Limits (≥16th percentile) or Below Normal Limits (<16th percentile).
• Functional status was assessed via self-reported employment and student status to evaluate "productivity" differences.

Main Results:

• 16-88% of participants with failed PVTs achieved within-normal-limits cognitive scores across various tests.
• An average of 5-7 out of 14 cognitive tasks were below the 16th percentile, depending on the PVT used.
• No significant differences in the number of below-normal cognitive performances were found between "productive" and "non-productive" participants.

Conclusions:

• Cognitive performance in the context of failed PVTs shows significant variability.
• Neurocognitive data retains practical importance for understanding cognitive abilities, even with invalid PVT results.
• Cognitive performance variability did not differ by "productivity" status, impacting clinical recommendations for functional abilities.