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Item response theory: How Mokken scaling can be used in clinical practice

Author

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  • Roger Watson
  • L Andries van der Ark
  • Li‐Chan Lin
  • Robert Fieo
  • Ian J Deary
  • Rob R Meijer

Abstract

Aims. To demonstrate the principles and application of Mokken scaling. Background. The history and development of Mokken scaling is described, some examples of applications are given, and some recent development of the method are summarised. Design. Secondary analysis of data obtained by cross‐sectional survey methods, including self‐report and observation. Methods. Data from the Edinburgh Feeding Evaluation in Dementia scale and the Townsend Functional Ability Scale were analysed using the Mokken scaling procedure within the ‘R’ statistical package. Specifically, invariant item ordering (the extent to which the order of the items in terms of difficulty was the same for all respondents whatever their total scale score) was studied. Results. The Edinburgh Feeding Evaluation in Dementia scale and the Townsend Functional Ability Scale showed no violations of invariant item ordering, although only the Townsend Functional Ability Scale showed a medium accuracy. Conclusion. Mokken scaling is an established method for item response theory analysis with wide application in the social sciences. It provides psychometricians with an additional tool in the development of questionnaires and in the study of individuals and their responses to latent traits. Specifically, with regard to the analyses conducted in this study, the Edinburgh Feeding Evaluation in Dementia scale requires further development and study across different levels of severity of dementia and feeding difficulty. Relevance to clinical practice. Good scales are required for assessment in clinical practice and the present paper shows how a relatively recently developed method for analysing Mokken scales can contribute to this. The two scales used as examples for analysis are highly clinically relevant.

Suggested Citation

  • Roger Watson & L Andries van der Ark & Li‐Chan Lin & Robert Fieo & Ian J Deary & Rob R Meijer, 2012. "Item response theory: How Mokken scaling can be used in clinical practice," Journal of Clinical Nursing, John Wiley & Sons, vol. 21(19pt20), pages 2736-2746, October.
  • Handle: RePEc:wly:jocnur:v:21:y:2012:i:19pt20:p:2736-2746
    DOI: 10.1111/j.1365-2702.2011.03893.x
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    Citations

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    Cited by:

    1. Susan D Shenkin & Roger Watson & Ken Laidlaw & John M Starr & Ian J Deary, 2014. "The Attitudes to Ageing Questionnaire: Mokken Scaling Analysis," PLOS ONE, Public Library of Science, vol. 9(6), pages 1-11, June.
    2. Joline Goossens & Sofie Verhaeghe & Ann Van Hecke & Geraldine Barrett & Ilse Delbaere & Dimitri Beeckman, 2018. "Psychometric properties of the Dutch version of the London Measure of Unplanned Pregnancy in women with pregnancies ending in birth," PLOS ONE, Public Library of Science, vol. 13(4), pages 1-15, April.
    3. Alessandro Chiarotto & Annette Bishop & Nadine E Foster & Kirsty Duncan & Ebenezer Afolabi & Raymond W Ostelo & Muirne C S Paap, 2018. "Item response theory evaluation of the biomedical scale of the Pain Attitudes and Beliefs Scale," PLOS ONE, Public Library of Science, vol. 13(9), pages 1-17, September.
    4. Karl Sigfrid, 2024. "IRT for voting advice applications: a multi-dimensional test that is adaptive and interpretable," Quality & Quantity: International Journal of Methodology, Springer, vol. 58(5), pages 4137-4156, October.
    5. Wen Liu & Roger Watson & Feng‐lan Lou, 2014. "The Edinburgh Feeding Evaluation in Dementia scale (EdFED): cross‐cultural validation of the simplified Chinese version in mainland China," Journal of Clinical Nursing, John Wiley & Sons, vol. 23(1-2), pages 45-53, January.

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