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coefficientalpha (version 0.5)

Robust Coefficient Alpha and Omega with Missing and Non-Normal Data

Description

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.

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Version

Install

install.packages('coefficientalpha')

Monthly Downloads

400

Version

0.5

License

GPL

Maintainer

Zhiyong Zhang

Last Published

May 31st, 2015

Functions in coefficientalpha (0.5)

bootstrap

Bootstrap se and CI for alpha and omega
coefficientalpha-package

Robust Cronbach's alpha and McDonald's omega with missing and non-normal data
alpha

Robust Cronbach's alpha and McDonald's omega
plot.alpha

Alpha/Omega related plot
tau.test

Test the tau-equivalence and the homogeneity of items
summary.alpha

Print alpha/omega and its confidence interval.
example

An example data set