A New Diagnostics Approach for Repeated Measures Designs

The traditional univariate analysis of the repeated measures design is obtained by treating subjects and their associated interactions as random effects. This analysis requires that certain variances and covariances of the dependent variable at various combinations of within-subject factors are equa...

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description The traditional univariate analysis of the repeated measures design is obtained by treating subjects and their associated interactions as random effects. This analysis requires that certain variances and covariances of the dependent variable at various combinations of within-subject factors are equal. Instability of the variance and covariance components may mask significant effects and may compel the researcher to use a less powerful multivariate technique. The number of subjects required in the multivariate approach is a function of the number of dependent variables and levels of the within-subject factors. Thus, the researcher may be forced to use a conservative degree-of-freedom adjustment instead, which may mask significant results if subject availability is limited.
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This analysis requires that certain variances and covariances of the dependent variable at various combinations of within-subject factors are equal. Instability of the variance and covariance components may mask significant effects and may compel the researcher to use a less powerful multivariate technique. The number of subjects required in the multivariate approach is a function of the number of dependent variables and levels of the within-subject factors. Thus, the researcher may be forced to use a conservative degree-of-freedom adjustment instead, which may mask significant results if subject availability is limited.</description><language>eng</language><subject>ANALYSIS OF VARIANCE ; ASH70 ; AVAILABILITY ; COVARIANCE ; DIAGNOSIS(GENERAL) ; Human Factors Engineering &amp; Man Machine System ; MATHEMATICAL MODELS ; MULTIVARIATE ANALYSIS ; PE62716A ; REPEATED MEASURES DESIGNS ; STABILITY ; Statistics and Probability ; UNIVARIATE ANALYSIS ; VARIATIONS ; Voice Communications</subject><creationdate>1990</creationdate><rights>Approved for public release; distribution is unlimited.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,778,883,27554,27555</link.rule.ids><linktorsrc>$$Uhttps://apps.dtic.mil/sti/citations/ADA223500$$EView_record_in_DTIC$$FView_record_in_$$GDTIC$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Grynovicki, Jock O</creatorcontrib><creatorcontrib>HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD</creatorcontrib><title>A New Diagnostics Approach for Repeated Measures Designs</title><description>The traditional univariate analysis of the repeated measures design is obtained by treating subjects and their associated interactions as random effects. 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subjects ANALYSIS OF VARIANCE
ASH70
AVAILABILITY
COVARIANCE
DIAGNOSIS(GENERAL)
Human Factors Engineering & Man Machine System
MATHEMATICAL MODELS
MULTIVARIATE ANALYSIS
PE62716A
REPEATED MEASURES DESIGNS
STABILITY
Statistics and Probability
UNIVARIATE ANALYSIS
VARIATIONS
Voice Communications
title A New Diagnostics Approach for Repeated Measures Designs
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