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Test Fairness: A Comment on Fairness in Statistical Analysis ANCOVA

Author(s):
Myers, Charles T.
Publication Year:
1975
Report Number:
RB-75-12
Source:
ETS Research Bulletin
Document Type:
Report
Page Count:
11
Subject/Key Words:
Analysis of Covariance (ANCOVA), Statistical Analysis, Statistical Bias, Test Bias, Test Interpretation

Abstract

Fairness or unfairness may be an attribute of a test per se, or of its use, or of its statistical treatment. An hypothetical situation designed to be intrinsically fair and unbiased is used to show that analysis of covariance as a statistical method may introduce bias to the treatment of test scores. In contrast, equipercentile equating methods are shown, in this situation, to result in a fair and unbiased treatment of test scores. A graphic figure illustrates the comparison of the two different methods of analysis. (Author) (11pp.)

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