A Note on Misconceptions Concerning Prospective and Retrospective Power
Abstract
This paper addresses some misconceptions concerning prospective and retrospective power when journal editors, reviewers and readers want to know the observed power of statistical tests within a completed study. In addition, a practical solution to both the problem of computing the power after a study has been conducted and the critical evaluation of null findings is suggested
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Retrospective power analyses are based on the assumption that the sample effect size is essentially identical to the effect size in the population from which it was drawn.
“Retrospective power analyses are based on the highly questionable assumption that the sample effect size is essentially identical to the effect size in the population from which it was drawn (Zumbo & Hubley, 1998).”
From G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences (2007) · cites this paper as Zumbo & Hubley, 1998
Cites
Cohen, J. (1992) · Psychological Bulletin · doi:10.1037//0033-2909.112.1.155 · Cited by 8,771 · see citing works
Goodman, S. N., & Berlin, J. A. (1994) · Annals of Internal Medicine · doi:10.7326/0003-4819-121-3-199408010-00008 · Cited by 658 · see citing works
A Handbook for data analysis in the behavioral sciences: methodological issues
(1993) · Choice Reviews Online · doi:10.5860/choice.31-0602 · Cited by 544 · see citing works
Jacques Bernoulli'sArt of Conjecturing
Hacking, I. (1971) · The British Journal for the Philosophy of Science · doi:10.1093/bjps/22.3.209 · Cited by 77 · see citing works
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Faul, F., Erdfelder, E., Lang, A.-G., & Buchner, A. (2007) · Behavior Research Methods · doi:10.3758/bf03193146 · Cited by 65,971 · see citing works
Ellis, P. D. (2010) · doi:10.1017/cbo9780511761676 · Cited by 2,461 · see citing works
Lakens, D. (2022) · Collabra Psychology · doi:10.1525/collabra.33267 · Cited by 1,962 · see citing works
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Perugini, M., Gallucci, M., & Costantini, G. (2018) · International Review of Social Psychology · doi:10.5334/irsp.181 · Cited by 426 · see citing works
Lan, L., & Lian, Z. (2009) · Building and Environment · doi:10.1016/j.buildenv.2009.11.002 · Cited by 359 · see citing works
O’Keefe, D. J. (2007) · Communication Methods and Measures · doi:10.1080/19312450701641375 · Cited by 249 · see citing works
Radhakrishnan, J., Moutzouris, D.-A., Ginzler, E. M., Solomons, N., Siempos, I. Ι., & Appel, G. B. (2009) · Kidney International · doi:10.1038/ki.2009.412 · Cited by 206 · see citing works
Bowen, L., Gross, A. S., Gimpel, M., Bruce‐Low, S., & Li, F.-X. (2019) · British Journal of Sports Medicine · doi:10.1136/bjsports-2018-099422 · Cited by 188 · see citing works
Turner, J., Nicholl, Webber, Cox, Dixon, S., & Yates (2000) · Health Technology Assessment · doi:10.3310/hta4310 · Cited by 160 · see citing works
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Baguley, T. S. (2004) · Applied Ergonomics · doi:10.1016/j.apergo.2004.01.002 · Cited by 148 · see citing works
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Ochodek, M., Nawrocki, J. R., & Kwarciak, K. (2010) · Information and Software Technology · doi:10.1016/j.infsof.2010.10.005 · Cited by 142 · see citing works
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Przeworski, A., Newman, M. G., Pincus, A. L., Kasoff, M. B., Yamasaki, A. S., Castonguay, L. G., & Berlin, K. S. (2011) · Journal of Abnormal Psychology · doi:10.1037/a0023334 · Cited by 135 · see citing works
Sleep quality, cortisol levels, and behavioral regulation in toddlers
Scher, A., Hall, W. A., Zaidman‐Zait, A., & Weinberg, J. (2009) · Developmental Psychobiology · doi:10.1002/dev.20410 · Cited by 115 · see citing works
Hubley, A. M., & Russell, L. B. (2009) · International Journal of Behavioral Development · doi:10.1177/0165025408099486 · Cited by 114 · see citing works
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Moonesinghe, R., Khoury, M. J., Liu, T., & Ioannidis, J. P. A. (2008) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0705554105 · Cited by 106 · see citing works
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Heinsberg, L. W., & Weeks, D. E. (2022) · Genetic Epidemiology · doi:10.1002/gepi.22464 · Cited by 94 · see citing works
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Dunn, E. K., & Eckert, T. L. (2002) · School Psychology Quarterly · doi:10.1521/scpq.17.1.24.19904 · Cited by 19 · see citing works
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Jiroutek, M. R., & Turner, J. R. (2017) · Journal of Clinical Hypertension · doi:10.1111/jch.13173 · Cited by 19 · see citing works
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Moran, J. L., & Peake, S. (2002) · Critical Care and Resuscitation · doi:10.1016/s1441-2772(23)00777-9 · Cited by 3 · see citing works
Atenafu, E. G., Hamid, J. S., Stephens, D., To, T. M., & Beyene, J. (2008) · Contemporary Clinical Trials · doi:10.1016/j.cct.2008.11.005 · Cited by 2 · see citing works
Rami, M. K. (2014) · UND Scholarly Commons (University of North Dakota) · Cited by 2 · see citing works
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Simon, S. D. (2001) · Journal of Andrology · doi:10.1002/j.1939-4640.2001.tb02147.x · Cited by 2 · see citing works
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- Authors
- Zumbo, B. D., & Hubley, A. M.
- Affiliations
- University of Northern British Columbia (CA)
- Venue
- Journal of the Royal Statistical Society: Series D (The Statistician)
- Publisher
- Wiley
- Published
- 1998-07
- Volume
- 47
- Issue
- 2
- Pages
- 385-388
- ISSN
- 0039-0526 (ISSN-L)
- 1467-9884
- OpenAlex
- W2011427590
- Cited by
- 121
- References
- 4
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 8 · 2021: 1 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 3 · 2016: 2 · 2015: 4 · 2014: 2 · 2013: 8 · 2012: 4
- FWCI
- 7.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the Royal Statistical Society Series D (The Statistician) (publishedVersion)
- Topics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
- Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Bayesian Inference
- Keywords
- statistical power, negative results, null hypothesis significance testing, statistical misconceptions
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