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Article: Statistical significance and effect size in education research: two sides of a coin.
- Article from:
- The Journal of Educational Research
- Article date:
- May 1, 2001
- Author:
CopyrightCOPYRIGHT 2001 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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In education research, statistical significance testing has received many valid criticisms in recent years primarily because the outcome of statistical significance testing relies too heavily on sample size, and the issue of practical significance is often ignored. Consequently, too much reliance on statistical significance testing often limits understanding and applicability of research findings in education practice. Effect size has been proposed as a supplement or an alternative to statistical significance testing; it has become increasingly popular. Some education researchers, however, may not be aware that, by itself, effect size can also be misleading because sample ...