Item ordering of personal disturbance scale (DSSI/sAD) in a longitudinal study: using Mokken scale analysis

Saiepour, Nargess, Najman, Jake M., Clavarino, Alexandra, Baker, Peter J., Ware, Robert S. and Williams, Gail (2014) Item ordering of personal disturbance scale (DSSI/sAD) in a longitudinal study: using Mokken scale analysis. Personality and Individual Differences, 58 37-42. doi:10.1016/j.paid.2013.09.030

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Author Saiepour, Nargess
Najman, Jake M.
Clavarino, Alexandra
Baker, Peter J.
Ware, Robert S.
Williams, Gail
Title Item ordering of personal disturbance scale (DSSI/sAD) in a longitudinal study: using Mokken scale analysis
Journal name Personality and Individual Differences   Check publisher's open access policy
ISSN 0191-8869
Publication date 2014-02
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.paid.2013.09.030
Open Access Status
Volume 58
Start page 37
End page 42
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2014
Language eng
Formatted abstract
• A large community-based cohort of women were followed for 21 years.
• Women’s mental health were assessed 6 times using the personal disturbance scale.
• Mokken scale analysis was applied to 14 items of the scale at each time point.
• A common hierarchical scale with 10 items was identified.
• The scale can be used to measure changes in women’s mental health over time.

In order to establish a common scale with a stable structure over time to use in repeated measures studies, this study uses information from a large community-based cohort of women. Mental health was assessed at six time points during 21 years, using the Delusions-Symptoms-States Inventory/States of Anxiety and Depression (DSSI/sAD) for 2698 women with mean age of 25.2 years at baseline. Mokken scale analysis is applied to the 14 items of DSSI/sAD at each time point, using a hierarchical clustering Algorithm and a Genetic Algorithm. Both algorithms resulted in one Mokken scale at each time point. After excluding items that did not meet the assumptions of Mokken scaling for polytomous data, a single common scale with 10 common items was extracted from scales, which was highly reliable at each time point. This measure with reasonable hierarchy of severity of items (symptoms) has a stable structure over time and can be used to track the changes of women’s mental health over time and analysed via repeated measures analysis.
Keyword Mokken scale analysis
Personal disturbance scale (DSSI/sAD)
Longitudinal study
Item ordering
Item response theory
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 23 October 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Public Health Publications
School of Pharmacy Publications
School of Social Science Publications
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 24 Oct 2013, 11:01:03 EST by Myrtle Sahabandu on behalf of School of Public Health