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The Metric Properties of Rating Scales Employed in Evaluation Research

An Empirical Examination

San Diego State University

This article describes a study that was designed to test the ordinal and interval properties of rating scales, the like of which are commonly employed in evaluation research. Because there is a scarcity of available techniques, testing the interval properties of the scales required a novel adaptation of Mosteller's (1951) "test for internal consistency." The analysis is based upon data generated by the use of paired comparisons and direct scales, and the conclusion reached is that rating scales such as those outlined in this article appear to possess metric properties.

Evaluation Review, Vol. 10, No. 3, 397-408 (1986)
DOI: 10.1177/0193841X8601000309


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