The Self-Report Symptom Inventory (SRSI) is sensitive to instructed feigning, but not to genuine psychopathology in male forensic inpatients: An initial study

Daniël van Helvoort, Harald Merckelbach, Thomas Merten

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Objective: The Self-Report Symptom Inventory (SRSI) is a new symptom validity test that, unlike other symptom over-reporting measures, contains both genuine symptom and pseudosymptom scales. We tested whether its pseudosymptom scale is sensitive to genuine psychopathology and evaluated its discriminant validity in an instructed feigning experiment that relied on carefully selected forensic inpatients (n = 40).
Method: We administered the SRSI twice: we instructed patients to respond honestly to the SRSI (T1) and then to exaggerate their symptoms in a convincing way (T2).
Results: On T1, the pseudosymptom scale was insensitive to patients’ actual psychopathology. Two patients (5%) had scores exceeding the liberal cut point (specificity = 0.95) and no patient scored above the more stringent cut point (specificity = 1.0). Also, the SRSI cut scores and ratio index discriminated well between honest (T1) and exaggerated (T2) responses (AUCs were 0.98 and 0.95, respectively).
Conclusions: Given the relatively few false positives, our data suggest that the pseudosymptom scale of the SRSI is a useful measure of symptom over-reporting in forensic treatment settings.
Original languageEnglish
Pages (from-to)1069-1082
Number of pages14
JournalNeuropsychology, Development and Cognition. Section D: The Clinical Neuropsychologist
Volume33
Issue number6
DOIs
Publication statusPublished - 18 Aug 2019

Keywords

  • Symptom validity
  • symptom over-reporting
  • feigning
  • forensic patients
  • Self-report symptom inventory
  • MALINGERED NEUROCOGNITIVE DYSFUNCTION
  • STRUCTURED-INVENTORY
  • AMERICAN ACADEMY
  • SECONDARY GAIN
  • RESPONSE BIAS
  • BASE RATES
  • POLICY
  • TESTS
  • SCALE

Cite this

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title = "The Self-Report Symptom Inventory (SRSI) is sensitive to instructed feigning, but not to genuine psychopathology in male forensic inpatients: An initial study",
abstract = "Objective: The Self-Report Symptom Inventory (SRSI) is a new symptom validity test that, unlike other symptom over-reporting measures, contains both genuine symptom and pseudosymptom scales. We tested whether its pseudosymptom scale is sensitive to genuine psychopathology and evaluated its discriminant validity in an instructed feigning experiment that relied on carefully selected forensic inpatients (n = 40).Method: We administered the SRSI twice: we instructed patients to respond honestly to the SRSI (T1) and then to exaggerate their symptoms in a convincing way (T2).Results: On T1, the pseudosymptom scale was insensitive to patients’ actual psychopathology. Two patients (5{\%}) had scores exceeding the liberal cut point (specificity = 0.95) and no patient scored above the more stringent cut point (specificity = 1.0). Also, the SRSI cut scores and ratio index discriminated well between honest (T1) and exaggerated (T2) responses (AUCs were 0.98 and 0.95, respectively).Conclusions: Given the relatively few false positives, our data suggest that the pseudosymptom scale of the SRSI is a useful measure of symptom over-reporting in forensic treatment settings.",
keywords = "Symptom validity, symptom over-reporting, feigning, forensic patients, Self-report symptom inventory, MALINGERED NEUROCOGNITIVE DYSFUNCTION, STRUCTURED-INVENTORY, AMERICAN ACADEMY, SECONDARY GAIN, RESPONSE BIAS, BASE RATES, POLICY, TESTS, SCALE",
author = "{van Helvoort}, Dani{\"e}l and Harald Merckelbach and Thomas Merten",
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T1 - The Self-Report Symptom Inventory (SRSI) is sensitive to instructed feigning, but not to genuine psychopathology in male forensic inpatients

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AU - Merckelbach, Harald

AU - Merten, Thomas

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N2 - Objective: The Self-Report Symptom Inventory (SRSI) is a new symptom validity test that, unlike other symptom over-reporting measures, contains both genuine symptom and pseudosymptom scales. We tested whether its pseudosymptom scale is sensitive to genuine psychopathology and evaluated its discriminant validity in an instructed feigning experiment that relied on carefully selected forensic inpatients (n = 40).Method: We administered the SRSI twice: we instructed patients to respond honestly to the SRSI (T1) and then to exaggerate their symptoms in a convincing way (T2).Results: On T1, the pseudosymptom scale was insensitive to patients’ actual psychopathology. Two patients (5%) had scores exceeding the liberal cut point (specificity = 0.95) and no patient scored above the more stringent cut point (specificity = 1.0). Also, the SRSI cut scores and ratio index discriminated well between honest (T1) and exaggerated (T2) responses (AUCs were 0.98 and 0.95, respectively).Conclusions: Given the relatively few false positives, our data suggest that the pseudosymptom scale of the SRSI is a useful measure of symptom over-reporting in forensic treatment settings.

AB - Objective: The Self-Report Symptom Inventory (SRSI) is a new symptom validity test that, unlike other symptom over-reporting measures, contains both genuine symptom and pseudosymptom scales. We tested whether its pseudosymptom scale is sensitive to genuine psychopathology and evaluated its discriminant validity in an instructed feigning experiment that relied on carefully selected forensic inpatients (n = 40).Method: We administered the SRSI twice: we instructed patients to respond honestly to the SRSI (T1) and then to exaggerate their symptoms in a convincing way (T2).Results: On T1, the pseudosymptom scale was insensitive to patients’ actual psychopathology. Two patients (5%) had scores exceeding the liberal cut point (specificity = 0.95) and no patient scored above the more stringent cut point (specificity = 1.0). Also, the SRSI cut scores and ratio index discriminated well between honest (T1) and exaggerated (T2) responses (AUCs were 0.98 and 0.95, respectively).Conclusions: Given the relatively few false positives, our data suggest that the pseudosymptom scale of the SRSI is a useful measure of symptom over-reporting in forensic treatment settings.

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KW - STRUCTURED-INVENTORY

KW - AMERICAN ACADEMY

KW - SECONDARY GAIN

KW - RESPONSE BIAS

KW - BASE RATES

KW - POLICY

KW - TESTS

KW - SCALE

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