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A psychometric evaluation of the Gudjonsson Suggestibility Scales : problems associated with measuring suggestibility as a difference score composite

Gignac, Gilles E. and Powell, Martine B. 2009, A psychometric evaluation of the Gudjonsson Suggestibility Scales : problems associated with measuring suggestibility as a difference score composite, Personality and individual differences, vol. 46, no. 2, pp. 88-93, doi: 10.1016/j.paid.2008.09.007.

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Title A psychometric evaluation of the Gudjonsson Suggestibility Scales : problems associated with measuring suggestibility as a difference score composite
Author(s) Gignac, Gilles E.
Powell, Martine B.ORCID iD for Powell, Martine B. orcid.org/0000-0001-5092-1308
Journal name Personality and individual differences
Volume number 46
Issue number 2
Start page 88
End page 93
Total pages 6
Publisher Elsevier Ltd.
Place of publication Amsterdam, The Netherlands
Publication date 2009-01
ISSN 0191-8869
1873-3549
Keyword(s) Gudjonsson Suggestibility Scales
eyewitness suggestibility
reliability
difference scores
Summary The current paper provides a detailed examination of the psychometric properties of the Gudjonsson Suggestibility Scales (Gudjonsson, 1997) which have been widely used to measure individual suggestibility. Several fundamental problems associated with the Shift and Total Suggestibility subscales are identified and discussed. Two arguably more conceptually coherent methods of scoring the Shift subscale (‘Shift-positive’ and ‘Shift-negative’) are introduced. A confirmatory factor analytic model based on two oblique factors and relative answering regression effects between corresponding items was tested and supported based on a sample of 220 children. Based on a latent variable estimation approach, the internal consistency reliabilities associated with the Shift subscale scores were found to be unacceptably low. Consequently, we propose that until the problems associated with Shift-standard and Total Suggestibility is addressed successfully, use of the GSS should be limited to the Yield subscale.
Language eng
DOI 10.1016/j.paid.2008.09.007
Field of Research 170104 Forensic Psychology
Socio Economic Objective 970117 Expanding Knowledge in Psychology and Cognitive Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, Elsevier Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022808

Document type: Journal Article
Collections: School of Psychology
Higher Education Research Group
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Created: Fri, 29 Jan 2010, 09:59:05 EST by Sally Morrigan

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