Severity Indices of Personality Problems (SIPP-118): development, factor structure, reliability, and validity.

@article{Verheul2008SeverityIO,
  title={Severity Indices of Personality Problems (SIPP-118): development, factor structure, reliability, and validity.},
  author={Roel Verheul and Helene Andrea and Caspar C. Berghout and Conor V. Dolan and Jan J. V. Busschbach and Petra J A van der Kroft and Anthony W. Bateman and Peter Fonagy},
  journal={Psychological assessment},
  year={2008},
  volume={20 1},
  pages={
          23-34
        }
}
This article describes a series of studies involving 2,730 participants on the development and validity testing of the Severity Indices of Personality Problems (SIPP), a self-report questionnaire covering important core components of (mal)adaptive personality functioning. Results show that the 16 facets constituted homogeneous item clusters (i.e., unidimensional and internally consistent parcels) that fit well into 5 clinically interpretable, higher order domains: self-control, identity… 

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