EMG measured reaction time as a predictor of invalid symptom report in psychosomatic patients.

IF 3 3区 心理学 Q2 CLINICAL NEUROLOGY Clinical Neuropsychologist Pub Date : 2024-07-01 Epub Date: 2023-11-02 DOI:10.1080/13854046.2023.2276480
Thorben Weymann, Johannes Achenbach, Jasmin E Guevara, Markus Bassler, Matthias Karst, Alexandra Lambrecht
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Abstract

Background: Symptom validity tests (SVTs) and performance validity tests (PVTs) are important tools in sociomedical assessments, especially in the psychosomatic context where diagnoses mainly depend on clinical observation and self-report measures. This study examined the relationship between reaction times (RTs) and scores on the Structured Inventory of Malingered Symptomatology (SIMS). It was proposed that slower RTs and larger standard deviations of reaction times (RTSDs) would be observed in participants who scored above the SIMS cut-off (>16). Methods: Direct surface electromyography (EMG) was used to capture RTs during a computer-based RT test in 152 inpatients from a psychosomatic rehabilitation clinic in Germany. Correlation analyses and Mann-Whitney U were used to examine the relationship between RTs and SIMS scores and to assess the potential impact of covariates such as demographics, medical history, and vocational challenges on RTs. Therefore, dichotomized groups based on each potential covariate were compared. Results: Significantly longer RTs and larger RTSDs were found in participants who scored above the SIMS cut-off. Current treatment with psychopharmacological medication, diagnosis of depression, and age had no significant influence on the RT measures. However, work-related problems had a significant impact on RTSDs. Conclusion: There was a significant relationship between longer and more inconsistent RTs and indicators of exaggerated or feigned symptom report on the SIMS in psychosomatic rehabilitation inpatients. Findings from this study provide a basis for future research developing a new RT-based PVT.

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肌电图测量的反应时间作为心身患者无效症状报告的预测指标。
背景:症状有效性测试(SVT)和表现有效性测试是社会医学评估的重要工具,尤其是在心身环境中,诊断主要取决于临床观察和自我报告措施。本研究检验了反应时间(RT)与恶性症状结构化量表(SIMS)评分之间的关系。有人提出,在得分高于SIMS临界值(>16)的参与者中,会观察到较慢的RT和较大的反应时间标准差(RTSD)。方法:在德国一家身心康复诊所的152名住院患者的计算机RT测试中,使用直接表面肌电图(EMG)捕捉RT。相关性分析和Mann-Whitney U用于检查RT和SIMS评分之间的关系,并评估人口统计学、病史和职业挑战等协变量对RT的潜在影响。因此,对基于每个潜在协变量的二分群进行了比较。结果:在得分高于SIMS临界值的参与者中,发现明显更长的RT和更大的RTSD。目前的精神药物治疗、抑郁症的诊断和年龄对RT测量没有显著影响。然而,与工作相关的问题对RTSD产生了重大影响。结论:在心身康复住院患者的SIMS中,较长且不一致的RT与夸大或假装症状报告的指标之间存在显著关系。这项研究的发现为未来研究开发一种新的基于RT的PVT提供了基础。
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来源期刊
Clinical Neuropsychologist
Clinical Neuropsychologist 医学-临床神经学
CiteScore
8.40
自引率
12.80%
发文量
61
审稿时长
6-12 weeks
期刊介绍: The Clinical Neuropsychologist (TCN) serves as the premier forum for (1) state-of-the-art clinically-relevant scientific research, (2) in-depth professional discussions of matters germane to evidence-based practice, and (3) clinical case studies in neuropsychology. Of particular interest are papers that can make definitive statements about a given topic (thereby having implications for the standards of clinical practice) and those with the potential to expand today’s clinical frontiers. Research on all age groups, and on both clinical and normal populations, is considered.
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