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Dissertation CSU.pdf (776.27 KB)

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Longitudinal stability of effect sizes in educational research

Stephens, Joshua
http://rave.ohiolink.edu/etdc/view?acc_num=csu1367322715

Abstract Details

2013, Doctor of Philosophy in Urban Education, Cleveland State University, College of Education and Human Services.
Effect sizes are the statistic generated by meta-analyses, a commonly used statistic in education research. Meta-analyses are widely used by education practitioners, administrators, and policy makers as a means to decide best classroom or school practices. It has been suggested by authors in other fields, most notably Jennions and Moller (2001), that effect sizes have declined over time due to various sources of bias. This paper examines the question of whether shifting effect sizes can be observed in educational research and attempts to explain possible causes of this observation. It uses the methodological framework used by Jennions and Moller (2001) and applies it to educational meta-analyses conducted from 1970 to the present. It finds that, contrary to the findings of Jennions and Moller (2001), that effect sizes in educational research have increased over time. Likely explanations regard systemic bias in the conduct and publication of educational research. The paper concludes with recommendations for future research to examine causal factors contributing to this phenomenon.
Jeremy Genovese (Committee Chair)
Education; Educational Theory
Meta-analysis; research methodology; bias

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Citations

  • Stephens, J. (2013). Longitudinal stability of effect sizes in educational research [Doctoral dissertation, Cleveland State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=csu1367322715

    APA Style (7th edition)

  • Stephens, Joshua. Longitudinal stability of effect sizes in educational research. 2013. Cleveland State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=csu1367322715.

    MLA Style (8th edition)

  • Stephens, Joshua. "Longitudinal stability of effect sizes in educational research." Doctoral dissertation, Cleveland State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1367322715

    Chicago Manual of Style (17th edition)

csu1367322715
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© 2013, all rights reserved.
This open access ETD is published by Cleveland State University and OhioLINK.