منابع مشابه
HE Plots for Repeated Measures Designs
Hypothesis error (HE) plots, introduced in Friendly (2007), provide graphical methods to visualize hypothesis tests in multivariate linear models, by displaying hypothesis and error covariation as ellipsoids and providing visual representations of effect size and significance. These methods are implemented in the heplots for R (Fox, Friendly, and Monette 2009a) and SAS (Friendly 2006), and appl...
متن کاملTesting multiple outcomes in repeated measures designs.
This study investigates procedures for controlling the familywise error rate (FWR) when testing hypotheses about multiple, correlated outcome variables in repeated measures (RM) designs. A content analysis of RM research articles published in 4 psychology journals revealed that 3 quarters of studies tested hypotheses about 2 or more outcome variables. Several procedures originally proposed for ...
متن کاملModels of accuracy in repeated-measures designs
Accuracy is often analyzed using analysis of variance techniques in which the data are assumed to be normally distributed. However, accuracy data are discrete rather than continuous, and proportion correct are constrained to the range 0–1. Monte Carlo simulations are presented illustrating how this can lead to distortions in the pattern of means. An alternative is to analyze accuracy using logi...
متن کاملHow many repeated measures in repeated measures designs? Statistical issues for comparative trials
BACKGROUND In many randomized and non-randomized comparative trials, researchers measure a continuous endpoint repeatedly in order to decrease intra-patient variability and thus increase statistical power. There has been little guidance in the literature as to selecting the optimal number of repeated measures. METHODS The degree to which adding a further measure increases statistical power ca...
متن کاملTrend-resistant repeated measurement Designs
The existence and non-existence of trend-resistant repeated measurement designs are investigated. Two families of efficient/optimal repeated measurement designs which are very popular among experimenters are shown to be trend-resistant or trend-resistant with respect to treatments.
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ژورنال
عنوان ژورنال: Journal of Statistical Software
سال: 2010
ISSN: 1548-7660
DOI: 10.18637/jss.v037.i04