Comparison and Properties of Correlational and Agreement Methods for Determining Whether or Not to Report Subtest Scores
Keywords:
subscore reporting; accuracy; precision; large-scale assessmentAbstract
Large-scale testing agencies often report subtest scores in addition to reporting
the total test score. But is there evidence that subtests reveal differences in student
performances? Three methods for determining whether subscore reporting is warranted
were examined and evaluated using large-scale data as well as samples of various sizes
for Reading and Mathematics assessments. Results revealed that subtests did not differ
among themselves and added no value over the total test. The method statistics were
determined to be accurate and precise estimators of the population parameters.
Implications for subscore reporting are discussed.
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Copyright (c) 2014 Oksana Babenko, W. Todd Rogers
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