Robust Coefficient Alpha and Omega with Missing and Non-Normal Data
Robust Cronbach's alpha and McDonald's omega
Bootstrap se and CI for alpha and omega
Robust Coefficient Alpha and Omega with Missing and Non-Normal Data
An example data set
Alpha/Omega related plot
Print alpha/omega and its confidence interval.
Test the tau-equivalence and the homogeneity of items
Cronbach's alpha and McDonald's omega are widely used reliability or internal consistency measures in social, behavioral and education sciences. Alpha is reported in nearly every study that involves measuring a construct through multiple test items. The package 'coefficientalpha' calculates coefficient alpha and coefficient omega with missing data and non-normal data. Robust standard errors and confidence intervals are also provided. A test is also available to test the tau-equivalent and homogeneous assumptions. Since Version 0.5, the bootstrap confidence intervals were added.