Performance validity tests in nonlitigant patients with functional motor disorder

Author:

Di Vico Ilaria A.12ORCID,Stone Jon3ORCID,Mcwhirter Laura3ORCID,Riello Marianna1ORCID,Zanolin Maria Elisabetta14ORCID,Colombari Michela1,Fiorio Mirta1ORCID,Tinazzi Michele1ORCID

Affiliation:

1. Department of Neurosciences, Biomedicine, and Movement Sciences University of Verona Verona Italy

2. Marlene and Paolo Fresco Institute for Parkinson's and Movement Disorders NYU Langone Health New York New York USA

3. Centre for Clinical Brain Sciences University of Edinburgh Edinburgh UK

4. Unit of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health University of Verona Verona Italy

Abstract

AbstractBackground and purposePerformance validity tests (PVTs) are used in neuropsychological assessments to detect patterns of performance suggesting that the broader evaluation may be an invalid reflection of an individual's abilities. Data on functional motor disorder (FMD) are currently poor and conflicting. We aimed to examine the rate of failure on three different PVTs of nonlitigant, non‐compensation‐seeking FMD patients, and we compared their performance to that of healthy controls and controls asked to simulate malingering (healthy simulators).MethodsWe enrolled 29 nonlitigant, non‐compensation‐seeking patients with a clinical diagnosis of FMD, 29 healthy controls, and 29 healthy simulators. Three PVTs, the Coin in the Hand Test (CIH), the Rey 15‐Item Test (REY), and the Finger Tapping Test (FTT), were employed.ResultsFunctional motor disorder patients showed low rates of failure on the CIH and REY (7% and 10%, respectively) and slightly higher rates on the FTT (15%, n = 26), which implies a motor task. Their performance was statistically comparable to that of healthy controls but statistically different from that of healthy simulators (p < 0.001). Ninety‐three percent of FMD patients, 7% of healthy simulators, and 100% of healthy controls passed at least two of the three tests.ConclusionsPerformance validity test performance of nonlitigant, non‐compensation‐seeking patients with FMD ranged from 7% to 15%. Patients' performance was comparable to that of controls and significantly differed from that of simulators. This simple battery of three PVTs could be of practical utility and routinely used in clinical practice.

Publisher

Wiley

Subject

Neurology (clinical),Neurology

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Words Matter;Neurology Clinical Practice;2024-04

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