#11731. An Experimental Study of the Effects of Biased Responding on the Modified Rivermead Post-concussion Symptoms Questionnaire and Validity Indicators

July 2026publication date
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Journal’s subject area:
Law;
Psychiatry and Mental Health;
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Abstract:
The identification and management of persistent post-concussion symptoms (PPCS) is reliant on the accurate and valid reporting of symptoms. This study explored the utility of the newly developed modified Rivermead Post-concussion Symptoms Questionnaire (RPQ), which embeds an SVI into the RPQ (mRPQ). Ninety-four participants completed the mRPQ; two existing SVIs (the Validity-10 [Val-10] and the Mild Brain Injury Atypical Symptoms [mBIAS] scale); two performance validity tests (the Test of Memory Malingering [TOMM] and Warrington’s Memory Recognition Test [WMRT]); and, a post-experimental questionnaire. This study utilized a simulation design, with participants randomly allocated to one of two conditions: mTBI Simulator (MS, n = 47) or Biased mTBI Simulator (BMS, n = 47). The BMS group received an additional biasing instruction to motivate distorted responding for a forensic assessment context. The validity measures were highly intercorrelated, as were the СССМ scores (p < 0.05). Although relatively new and requiring further analysis, this study shows the mRPQ has the potential to aid clinical assessment as an indicator of symptom invalidity.
Keywords:
Assessment; Concussion; Forensic neuropsychology; Malingering; Minor head injury

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