Statistical significance and effect size in education research: two sides of a coin

Authors

  • Trevor Haddish Faculty of Education and Applied Science, University of the Philippines Diliman

Keywords:

Effect-size measures, research practice, statistical significance testing

Abstract

T In education research, statistical significance and effect size are 2 sides of 1 coin; they complement each other but they do not substitute for each other. Good research practice requires that, to make sound research decisions, both sides should be considered. In a simulation study, the sampling variability of 2 popular effect-size measures (d and R2) was examined. The variability showed that what is statistically significant may not be practically meaningful, and what appears to be practically meaningful could have been the result of sampling error, thus not trustworthy. Some practical guidelines are suggested for combining the 2 sources of information in research practice.

Author Biography

Trevor Haddish, Faculty of Education and Applied Science, University of the Philippines Diliman

Dr. Trevor Haddish is a highly respected education professional and academic, with a focus on the field of education. He holds a doctorate degree and currently serves as a faculty member in the Faculty of Education and Applied Science at the University of the Philippines Diliman, where he has made a significant impact on students and colleagues alike. Throughout his career, Dr. Haddish has been dedicated to promoting excellence in education and helping students achieve their full potential. He is known for his innovative teaching methods, which bring a unique perspective to the classroom and engage students in exciting and meaningful ways. In addition to his work in the classroom, Dr. Haddish is also a dedicated researcher, with a particular interest in the intersection of technology and education. He has published numerous papers and articles on this topic, and his work is widely respected by his peers. He is often invited to speak at conferences and events, sharing his insights and ideas with the wider academic community.

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Published

2022-06-20

How to Cite

Haddish, T. . (2022). Statistical significance and effect size in education research: two sides of a coin. Edith Cowan Journal of Education, 2(1), 52–60. Retrieved from https://edithcowanjournal.org/journals/index.php/journal-of-education/article/view/63

Issue

Vol. 2 No. 1 (2022): The Future of Teacher Professional Development: Trends and Challenges

Section

Articles