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Article: Invariance of factor structure of the 21-item Peters et al. Delusions Inventory (PDI-21) over time and across samples

TitleInvariance of factor structure of the 21-item Peters et al. Delusions Inventory (PDI-21) over time and across samples
Authors
KeywordsCross-sample invariance
Delusion
Longitudinal invariance
Schizophrenia
The 21-item Peters et al. Delusions Inventory (PDI-21)
Issue Date2017
Citation
Psychiatry Research, 2017, v. 254, p. 190-197 How to Cite?
Abstract© 2017 Elsevier Ireland Ltd The present study aimed to explore the latent structure of the 21-item Peters et al. Delusions Inventory (PDI-21) and to test the invariance of its factor structure over time and across samples. The PDI-21 was administered in two samples; one consisting of 1655 undergraduate students investigated in three waves, each separated by six months; and another consisting of 196 outpatients with schizophrenia. Exploratory factor analysis was performed to explore the internal structure of the PDI-21 based on number of beliefs and the grand total scores separately. The number of factors was determined by optimal implementation of parallel analysis. Confirmatory factor analysis, cross-time and cross-sample invariance analyses were carried out with Mplus. Both exploratory factor analysis and the optimal implementation of parallel analysis (based on the number of beliefs and the total score of the PDI-21) suggested a one-factor solution. However, the confirmatory factor analysis revealed a single-dimension structure based on number of beliefs only, which exhibited goodness of fit and stability across time and samples. Our study demonstrated a single-dimension structure of the PDI-21, which can be widely used in screening the number of delusional ideations both in clinical and non-clinical populations.
Persistent Identifierhttp://hdl.handle.net/10722/293014
ISSN
2023 Impact Factor: 4.2
2023 SCImago Journal Rankings: 2.189
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Yan Yu-
dc.contributor.authorShi, Hai Song-
dc.contributor.authorLiu, Wen Hua-
dc.contributor.authorYan, Chao-
dc.contributor.authorWang, Yi-
dc.contributor.authorChiu, Chui de-
dc.contributor.authorSo, Suzanne H.-
dc.contributor.authorLui, Simon S.Y.-
dc.contributor.authorCheung, Eric F.C.-
dc.contributor.authorChan, Raymond C.K.-
dc.date.accessioned2020-11-17T14:57:41Z-
dc.date.available2020-11-17T14:57:41Z-
dc.date.issued2017-
dc.identifier.citationPsychiatry Research, 2017, v. 254, p. 190-197-
dc.identifier.issn0165-1781-
dc.identifier.urihttp://hdl.handle.net/10722/293014-
dc.description.abstract© 2017 Elsevier Ireland Ltd The present study aimed to explore the latent structure of the 21-item Peters et al. Delusions Inventory (PDI-21) and to test the invariance of its factor structure over time and across samples. The PDI-21 was administered in two samples; one consisting of 1655 undergraduate students investigated in three waves, each separated by six months; and another consisting of 196 outpatients with schizophrenia. Exploratory factor analysis was performed to explore the internal structure of the PDI-21 based on number of beliefs and the grand total scores separately. The number of factors was determined by optimal implementation of parallel analysis. Confirmatory factor analysis, cross-time and cross-sample invariance analyses were carried out with Mplus. Both exploratory factor analysis and the optimal implementation of parallel analysis (based on the number of beliefs and the total score of the PDI-21) suggested a one-factor solution. However, the confirmatory factor analysis revealed a single-dimension structure based on number of beliefs only, which exhibited goodness of fit and stability across time and samples. Our study demonstrated a single-dimension structure of the PDI-21, which can be widely used in screening the number of delusional ideations both in clinical and non-clinical populations.-
dc.languageeng-
dc.relation.ispartofPsychiatry Research-
dc.subjectCross-sample invariance-
dc.subjectDelusion-
dc.subjectLongitudinal invariance-
dc.subjectSchizophrenia-
dc.subjectThe 21-item Peters et al. Delusions Inventory (PDI-21)-
dc.titleInvariance of factor structure of the 21-item Peters et al. Delusions Inventory (PDI-21) over time and across samples-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.psychres.2017.04.053-
dc.identifier.pmid28463717-
dc.identifier.scopuseid_2-s2.0-85018362288-
dc.identifier.volume254-
dc.identifier.spage190-
dc.identifier.epage197-
dc.identifier.eissn1872-7123-
dc.identifier.isiWOS:000404498600029-
dc.identifier.issnl0165-1781-

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