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Optimal Choice of Rater Terms I: Theory

Published online by Cambridge University Press:  01 January 2025

Janet Dixon Elashoff
Janet Dixon Elashoff*
Affiliation:
Harvard University
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Abstract

How can an investigator choose a good team of raters to use for measuring a continuous variable when each available rater produces only dichotomous responses? We formulate an underlying model, define an index of goodness for rater teams in terms of average mean square error of the estimate, develop a new estimator and derive the optimal rater terms. The optimal raters have characteristic curves which are linear in form and satisfy the requirements for a Guttman scale.

Type
Original Paper
Information
Psychometrika , Volume 34 , Issue 1 , March 1969 , pp. 21 - 32
Copyright
Copyright © 1969 The Psychometric Society

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Footnotes

*

This research was supported in part by the author's predoctoral fellowship from the National Institutes of Health and by National Science Foundation Grant GS-341, National institutes of Health Grants FR-3 and FR-122.

†

Now at Stanford University.

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