Bifactor and item response theory analyses of interviewer report scales of cognitive impairment in schizophrenia.

@article{Reise2011BifactorAI,
  title={Bifactor and item response theory analyses of interviewer report scales of cognitive impairment in schizophrenia.},
  author={Steven P. Reise and Joseph Ventura and Richard S. E. Keefe and Lyle E Baade and James M. Gold and Michael F. Green and R. Santiago Kern and Raquelle I. Mesholam-Gately and Keith H. Nuechterlein and Larry J. Seidman and Robert M. Bilder},
  journal={Psychological assessment},
  year={2011},
  volume={23 1},
  pages={245-61}
}
A psychometric analysis of 2 interview-based measures of cognitive deficits was conducted: the 21-item Clinical Global Impression of Cognition in Schizophrenia (CGI-CogS; Ventura et al., 2008), and the 20-item Schizophrenia Cognition Rating Scale (SCoRS; Keefe et al., 2006), which were administered on 2 occasions to a sample of people with schizophrenia. Traditional psychometrics, bifactor analysis, and item response theory methods were used to explore item functioning and dimensionality and to… CONTINUE READING

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