Description Usage Arguments Value References See Also
If a covariate (or possibly a set of covariates) is partialled out from a set of target variables, their corresponding coefficient alpha can be decomposed into a part that is dependent on that covariate and a part that is independent ("free") from that covariate (and the sum equals ordinary coefficient alpha).
1 |
data |
A data frame or matrix containing both the variables as well as the covariate(s). This can also be a covariance matrix. |
xx |
Numeric. A vector of indices to specify the columns in |
zz |
Numeric. A vector of indices to specify the columns in |
use |
an optional character string giving a
method for computing covariances in the presence
of missing values. This must be (an abbreviation of) one of the strings
|
Returns a named vector with covariate-free, covariate-dependent, and total Cronbach's alpha (unstandardized).
Bentler, P. (2015). Covariate-free and covariate-dependent reliability. Manuscript submitted for publication. Retrieved from http://escholarship.org/uc/item/6v61v1pk
Cronbach's alpha in the psych package: alpha
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