Reliability of Difference Scores Obtained From Nested Data Within a Multivariate Generalizability Theory Framework
Educational and Psychological Measurement
Published online on July 08, 2026
Abstract
Educational and Psychological Measurement, Ahead of Print.
The purpose of this study is to examine the reliability and dependability of difference scores computed as the change between a pretest and a posttest administered to assess the effectiveness of an intervention. The data-collection design involved a ...
The purpose of this study is to examine the reliability and dependability of difference scores computed as the change between a pretest and a posttest administered to assess the effectiveness of an intervention. The data-collection design involved a ...