Application of item response theory for development of a global functioning measure of dementia with linear measurement properties.

  title={Application of item response theory for development of a global functioning measure of dementia with linear measurement properties.},
  author={Dan Mungas and Barbara R. Reed},
  journal={Statistics in medicine},
  volume={19 11-12},
An ideal measure of global functioning for patients with dementia would discriminate at very high and very low levels of functioning and would have linear measurement properties such that a given change in score corresponds to the same amount of change in underlying ability at any part of the ability continuum. Using item response theory methods, linearity of test measurement can be directly assessed and items can be selected to construct a test with desired measurement characteristics. The… CONTINUE READING

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