Cited by 945Statistical Methods and Bayesian InferenceOptimal Experimental Design MethodsStatistical Methods and Applications

Conditions under Which Mean Square Ratios in Repeated Measurements Designs Have Exact F-Distributions

Huynh, Huynh, Feldt, Leonard S.·1970·Journal of the American Statistical Association

Abstract

Investigation is made of the character of the covariance matrix which will result in exact F-distributions for the treatments and interaction variance ratios in repeated measurements designs. It is shown, assuming multivariate normality, that the matrix may exhibit a more general character than is typically implied to be essential. Equality of variances and equality of covariances, with identical matrices for all levels of a second treatment factor, are sufficient but not necessary conditions. The necessary and sufficient condition is the equality of variances of differences for all pairs of treatment measures assumed to be correlated. An alternative statement is that the Box-Geisser-Greenhouse parameter ε = 1.0. A test is described which bears on the tenability of this condition.

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Crossref · 10.1080/01621459.1970.10481187

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  • In order to compensate for adverse effects in tests of within effects or between-within interactions, the noncentrality parameter and the degrees of freedom of the F distribution can be multiplied by a correction factor.

    “In order to compensate for such adverse effects in tests of within effects or between-within interactions, the noncentrality parameter and the degrees of freedom of the F distribution can be multiplied by a correction factor (Geisser & Greenhouse, 1958;Huynh & Feldt, 1970).”

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Authors
Huynh, H., & Feldt, L. S.
Affiliations
University of Iowa (US)
Venue
Journal of the American Statistical Association
Published
1970-12
Volume
65
Issue
332
Pages
1582-1589
ISSN
  • 0162-1459 (ISSN-L)
  • 1537-274X
OpenAlex
W1976429900
Cited by
945
References
18
Citations by year
2026: 4 · 2025: 5 · 2024: 5 · 2023: 9 · 2022: 9 · 2021: 13 · 2020: 16 · 2019: 17 · 2018: 17 · 2017: 18 · 2016: 25 · 2015: 19 · 2014: 29 · 2013: 24 · 2012: 28
FWCI
1.48
Type
journal article
Language
en
Open access
closed
Locations
Journal of the American Statistical Association (publishedVersion)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Bayesian Inference
  • Social Sciences › Decision Sciences › Management Science and Operations Research › Optimal Experimental Design Methods
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Applications
Keywords
repeated measures designs, covariance matrix, multivariate normality, equality of variances, variance ratio

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