The Accuracy of Computerized Adaptive Testing in Heterogeneous Populations: A Mixture Item-Response Theory Analysis

• Richard Sawatzky ,

  Contributed equally to this work with: Richard Sawatzky, Pamela A. Ratner

  * E-mail: rick.sawatzky@twu.ca

  Affiliations School of Nursing, Trinity Western University, Langley, British Columbia, Canada, Centre for Health Evaluation and Outcomes Science, Providence Health Care Research Institute, Vancouver, British Columbia, Canada

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• Pamela A. Ratner ,

  Contributed equally to this work with: Richard Sawatzky, Pamela A. Ratner

  Affiliation Faculty of Education, University of British Columbia, Vancouver, British Columbia, Canada

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• Jacek A. Kopec ,

  ¶‡ These authors also contributed equally to this work.

  Affiliations School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada, Arthritis Research Centre of Canada, Vancouver, British Columbia, Canada

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• Amery D. Wu ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Measurement, Evaluation & Research Methodology, University of British Columbia, Vancouver, British Columbia, Canada

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• Bruno D. Zumbo

  ¶‡ These authors also contributed equally to this work.

  Affiliations Measurement, Evaluation & Research Methodology, University of British Columbia, Vancouver, British Columbia, Canada, University of British Columbia, Vancouver, British Columbia, Canada

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