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An Evaluation of Statistical Strategies for Making Equating Function Selections

Author(s):
Moses, Tim P.
Publication Year:
2008
Report Number:
RR-08-60
Source:
ETS Research Report
Document Type:
Report
Page Count:
25
Subject/Key Words:
Significance Testing, Equivalent Groups (EG) Design, Equating

Abstract

Nine statistical strategies for selecting equating functions in an equivalent groups design were evaluated. The strategies of interest were likelihood ratio chi-square tests, regression tests, Kolmogorov-Smirnov tests, and significance tests for equated score differences. The most accurate strategies in the study were the likelihood ratio tests and the significance tests for equated score differences.

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