covariance structure
compound symmetry covariance structure
Alejandra Gonzalez-Beltran
Camille Maumet
Orlaith Burke
CS
Philippe Rocca-Serra
Tom Nichols
compound symmetry covariance structure is a covariance structure which means that all the variances are equal and all the covariances are equal.
http://stat.ethz.ch/R-manual/R-devel/library/nlme/html/corCompSymm.html
http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_mixed_sect019.htm
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