Summed-score linking using item response theory: application to depression measurement.

@article{Orlando2000SummedscoreLU,
  title={Summed-score linking using item response theory: application to depression measurement.},
  author={Maria Antonietta Orlando and Cathy Donald Sherbourne and David M Thissen},
  journal={Psychological assessment},
  year={2000},
  volume={12 3},
  pages={
          354-9
        }
}
An item response theory (IRT) approach to test linking based on summed scores is presented and demonstrated by calibrating a modified 23-item version of the Center for Epidemiologic Studies Depression Scale (CES-D) to the standard 20-item CES-D. Data are from the Depression Patient Outcomes Research Team, II, which used a modified CES-D to measure risk for depression. Responses (N = 1,120) to items on both the original and modified versions were calibrated simultaneously using F. Samejima's… CONTINUE READING
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