covrel | R Documentation |
These functions allow for the computation of the reliability of a dataset from the covariance matrix of its variables.
calpha(covmat) lambda2(covmat) lambda4(covmat)
covmat |
a covariance matrix |
calpha()
: Cronbach's alpha
lambda2()
: Guttman's Lambda-2
lambda4()
: Guttman's Lambda-4. This algorithm tries to get the highest attainable reliability by
splitrel
# compute reliability from covariance h<-cov(iris[,1:4]) calpha(h) lambda2(h) lambda4(h) # Lambda-2 and Lambda-4 are significantly larger because # some of the variables in the iris dataset are negatively correlated.
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