There are two competing desires for improving psychometric screening tests: decreasing
length in order to decrease respondent burden and interviewer time on the one hand,
and increasing measurement precision in order to limit the number of individuals who
are referred for further evaluation (i.e., to limit false positive screens) on the
other hand. Previously there had been no framework that enabled these competing desires
to be unified into a single strategy that could increase precision without necessarily
increasing instrument length. This study used a novel combination of receiver operator
characteristic (ROC) curves with item response theory (IRT) and provides a new technique
for improving psychometric screening tests. A brief example is given from screening
tests for dementia.
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© 2003 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
