This paper shows how the reliability of measures and the use of pretests (or covariates) both have the..potential to increase the statistical power in research designs. Tables are presented that show how specific..changes in these factors can dramatically reduce the sample size necessary to determine whether an..intervention is effective, thus potentially improving the effectiveness of assessment in terms of reducing the..time and cost of collecting scientific support for new practices. Accessed 36,222 times on https://pareonline.net from February 26, 2004 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
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"The Contributions of Reliability and Pretests to Effective Assessment,"
Practical Assessment, Research, and Evaluation: Vol. 9, Article 3.
Available at: https://scholarworks.umass.edu/pare/vol9/iss1/3