Cross-cultural applicability of the Inventory of Problems–29 (IOP–29): A pre-registered German replication of Akca, Tepedelen, et al. (2023)

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dc.authorid0009-0008-3892-1039
dc.authorid0000-0002-0202-2655
dc.authorid0000-0003-4321-1302
dc.authorid0000-0002-3450-7059
dc.authorid0000-0002-9540-4803
dc.contributor.authorHöpfner, Henrike
dc.contributor.authorUysal, Burcu
dc.contributor.authorStemmler, Mark
dc.contributor.authorAkca, Ali Y. E.
dc.contributor.authorGiromini, Luciano
dc.contributor.authorUysal, Burcu
dc.contributor.otherİnsan ve Toplum Bilimleri Fakültesi, Psikoloji Bölümü
dc.date.accessioned2025-01-20T05:44:19Z
dc.date.available2025-01-20T05:44:19Z
dc.date.issued2025
dc.departmentİHÜ, İnsan ve Toplum Bilimleri Fakültesi, Psikoloji Bölümü
dc.description.abstractAssessing the credibility of psychological problems in forensic evaluations is crucial. The Inventory of Problems–29 (IOP–29) is becoming a valuable symptom validity test (SVT) worldwide and has been validated in over 15 languages. This study evaluates the German IOP–29 and fills a gap by replicating a study of Akca, Tepedelen, et al. We analysed 384 IOP–29 protocols from 128 German-speaking adults (range = 18–87 years) under three conditions: honest, random and feigned responses (post-traumatic stress disorder, PTSD; depression; schizophrenia). Statistical analyses showed that the False Disorder Probability Score (FDS) effectively discriminated between honest and feigned responses (Hedges g = 3.90), with a sensitivity of .91 and a specificity of .95 at an FDS cut-off value of ≥.50. A new index for detecting careless or random responses also showed promising results. This study confirms the utility of the IOP–29 in the German-speaking population and supports its cross-cultural applicability.
dc.identifier.citationHöpfner, H., Uysal, B., Stemmler, M., Akca, A. Y. E. ve Giromini, L. (2025). Cross-cultural applicability of the Inventory of Problems–29 (IOP–29): A pre-registered German replication of Akca, Tepedelen, et al. (2023). Psychiatry, Psychology and Law, 1-14. https://doi.org/10.1080/13218719.2024.2441788
dc.identifier.doi10.1080/13218719.2024.2441788
dc.identifier.endpage14
dc.identifier.issn1321-8719
dc.identifier.scopus2-s2.0-85214680390
dc.identifier.scopusqualityQ2
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.1080/13218719.2024.2441788
dc.identifier.urihttps://hdl.handle.net/20.500.12154/3164
dc.identifier.wosWOS:001392934600001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakScopus
dc.indekslendigikaynakWeb of Science
dc.institutionauthorUysal, Burcu
dc.institutionauthorid0000-0002-0202-2655
dc.language.isoen
dc.publisherRoutledge
dc.relation.ispartofPsychiatry, Psychology and Law
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectDepression
dc.subjectFeigning
dc.subjectGerman
dc.subjectIOP–29
dc.subjectMalingering
dc.subjectPTSD
dc.subjectSchizophrenia
dc.subjectSymptom Validity Test
dc.titleCross-cultural applicability of the Inventory of Problems–29 (IOP–29): A pre-registered German replication of Akca, Tepedelen, et al. (2023)
dc.typeArticle
dspace.entity.typePublication
relation.isAuthorOfPublicationf230e88d-1e12-4d67-8586-b4d8ad9ce582
relation.isAuthorOfPublication.latestForDiscoveryf230e88d-1e12-4d67-8586-b4d8ad9ce582
relation.isOrgUnitOfPublication85dd7f0d-d732-490e-9c57-18868e32298e
relation.isOrgUnitOfPublication.latestForDiscovery85dd7f0d-d732-490e-9c57-18868e32298e

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