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 nonnormal data. Robust standard errors and confidence intervals are also provided. A test is also available to test the tauequivalent and homogeneous assumptions. Version 0.5 added the bootstrap confidence intervals.
Package details 


Author  Zhiyong Zhang and KeHai Yuan 
Maintainer  Zhiyong Zhang <[email protected]> 
License  GPL 
Version  0.5 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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