Applying generalizability theory with R: A package

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I have contributed my generalizability functions to the QME: Quantitative Methods in Education Rlogo.jpg package. I described my efforts in an earlier post. This project continues to be a great learning experience for me, especially in terms of seeing how classical test theory, generalizability theory, and multilevel modeling overlap. I will probably submit a proposal to demonstrate the package at either NCME or AERA in 2014. You can use the following commands to install the package:

library(devtools)
install_github("QME", "zief0002")

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I have installed,but it does not work. data(Brennan.4) does not work. Please can you advice me. Thanks

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