An Inventory of Problems–29 (IOP–29) study investigating feigned schizophrenia and random responding in a British community sample

Winters, Christina and Giromini, Luciano and Crawford, Trevor and Ales, Francesca and Viglione, Donald and Warmelink, Lara (2020) An Inventory of Problems–29 (IOP–29) study investigating feigned schizophrenia and random responding in a British community sample. Psychiatry, Psychology and Law. ISSN 1321-8719

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Abstract

Compared to other Western countries, malingering research is still relatively scarce in the United Kingdom, partly because only a few brief and easy-to-use symptom validity tests (SVTs) have been validated for use with British test-takers. This online study examined the validity of the Inventory of Problems–29 (IOP–29) in detecting feigned schizophrenia and random responding in 151 British volunteers. Each participant took three IOP–29 test administrations: (a) responding honestly; (b) pretending to suffer from schizophrenia; and (c) responding at random. Additionally, they also responded to a schizotypy measure (OLIFE) under standard instruction. The IOP–29’s feigning scale (FDS) showed excellent validity in discriminating honest responding from feigned schizophrenia (AUC ¼ .99), and its classification accuracy was not significantly affected by the presence of schizotypal traits. Additionally, a recently introduced IOP–29 scale aimed at detecting random responding (RRS) demonstrated very promising results.

Item Type:
Journal Article
Journal or Publication Title:
Psychiatry, Psychology and Law
Additional Information:
This is an Accepted Manuscript of an article published by Taylor & Francis in Psychiatry, Psychology and Law on 02/06/2020, available online: https://www.tandfonline.com/doi/abs/10.1080/13218719.2020.1767720
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3300/3308
Subjects:
ID Code:
144786
Deposited By:
Deposited On:
10 Jul 2020 13:50
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Oct 2020 02:46