Mokken scaling and principal components analyses of the CORE-OM in a large clinical sample.

@article{Bedford2010MokkenSA,
  title={Mokken scaling and principal components analyses of the CORE-OM in a large clinical sample.},
  author={Alan Bedford and Roger Watson and J. Lyne and Jennifer Tibbles and F Davies and Ian J. Deary},
  journal={Clinical psychology \& psychotherapy},
  year={2010},
  volume={17 1},
  pages={
          51-62
        }
}
In a sample of 543 adult National Health Service (NHS) patients referred to a Psychological Therapies Service, the responses to the Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM) self-report questionnaire were examined using conventional principal components analysis (PCA) and a unique application of Mokken Scaling Procedure (MSP). Following the theoretical views of G. A. Foulds, it was suggested that some items more properly belong to the universe of attitudes and traits… 

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