Rights statement: 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
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An Inventory of Problems–29 (IOP–29) study investigating feigned schizophrenia and random responding in a British community sample
AU - Winters, Christina
AU - Giromini, Luciano
AU - Crawford, Trevor
AU - Ales, Francesca
AU - Viglione, Donald
AU - Warmelink, Lara
N1 - 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
PY - 2021/3/31
Y1 - 2021/3/31
N2 - 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.
AB - 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.
KW - feigning
KW - Inventory of Problems
KW - IOP–29
KW - malingering
KW - O-LIFE
KW - Oxford–Liverpool Inventory of Feelings and Experiences
KW - random responding;
KW - schizophrenia
KW - schizotypy
KW - British
U2 - 10.1080/13218719.2020.1767720
DO - 10.1080/13218719.2020.1767720
M3 - Journal article
VL - 28
SP - 235
EP - 254
JO - Psychiatry, Psychology and Law
JF - Psychiatry, Psychology and Law
SN - 1321-8719
IS - 2
ER -