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. Version 0.5 added the bootstrap confidence intervals.
|Author:||Zhiyong Zhang and Ke-Hai Yuan|
|Maintainer:||Zhiyong Zhang <johnnyzhz at gmail.com>|
|License:||GPL-2 | GPL-3 [expanded from: GPL]|
|CRAN checks:||coefficientalpha results|
|Windows binaries:||r-devel: coefficientalpha_0.5.zip, r-release: coefficientalpha_0.5.zip, r-oldrel: coefficientalpha_0.5.zip|
|OS X Mavericks binaries:||r-release: coefficientalpha_0.5.tgz, r-oldrel: coefficientalpha_0.5.tgz|
|Old sources:||coefficientalpha archive|
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