Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/186268
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- Title
- Reliability of factorial structure of the Peters et al. Delusions Inventory (PDI-21)
- Related
- Personality and individual differences, Vol. 43, Issue 4, (2007), p.647-656
- DOI
- 10.1016/j.paid.2007.01.018
- Publisher
- Elsevier
- Date
- 2007
- Author/Creator
- Jones, Simon R
- Author/Creator
- Fernyhough, Charles
- Description
- The 21-item version of the Peters et al. Delusions Inventory (PDI-21) is a commonly used tool to measure delusional ideation in the normal population. Two recent principal component analyses have concluded that the PDI-21 has a seven-factor structure. Although these studies found identical factors associated with religiosity and grandiosity, the items loading on the remaining five factors, and hence the interpretation of these, differed. Such seven-factor structures of the PDI-21 are beginning to be used in research; however, a consistent item-level seven-factor structure has not been replicated and no data have been reported to support the reliability of such factors. We administered the PDI-21 to a non-psychiatric sample (N = 493). It was found that, with the exception of religiosity/religiousness, the previously reported factors of the PDI-21 had Cronbach's alphas of less than 0.7. After a factor analysis using principal axis factoring, parallel analysis suggested the extraction of three factors. Of these factors, only one (religiosity/religiousness) was found to be both internally reliable and meaningful. It is concluded that the PDI-21 is best used with a unidimensional scoring system and that new measures are needed to assess specific types of delusion-like beliefs in the normal population.
- Description
- 10 page(s)
- Subject Keyword
- Delusions
- Subject Keyword
- Factor
- Subject Keyword
- Peters et al. Delusions Inventory
- Subject Keyword
- Reliability
- Resource Type
- journal article
- Organisation
- Macquarie University. Macquarie Centre for Cognitive Science
- Identifier
- http://hdl.handle.net/1959.14/186268
- Identifier
- ISSN:0191-8869
- Identifier
- mq_res-ext-2-s2.0-34250703242
- Language
- eng
- Reviewed
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