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Direct linkTrierweiler, Tammy J.; Lewis, Charles; Smith, Robert L. – Journal of Educational Measurement, 2016
In this study, we describe what factors influence the observed score correlation between an (external) anchor test and a total test. We show that the anchor to full-test observed score correlation is based on two components: the true score correlation between the anchor and total test, and the reliability of the anchor test. Findings using an…
Descriptors: Scores, Correlation, Tests, Test Reliability
Peer reviewedWillingham, Warren W.; Pollack, Judith M.; Lewis, Charles – Journal of Educational Measurement, 2002
Proposed a framework of possible differences between grades and test scores and tested the framework with data on 8,454 high school seniors from the National Education Longitudinal Study. Identified differences and correlations among achievement factors. Differences between grades and tests give these measures complementary strengths in…
Descriptors: Academic Achievement, Correlation, Elementary Secondary Education, Grades (Scholastic)
