This package will containing anything, and everything, that could possibly fall under the umbrella of quantitative validity or reliability measures.
At the moment it does: - Coefficient alpha; KR-20; Spearman-Brown correction; calculates new test length given a desired and present reliablity and test length; standard error of measurement; and standard error of difference.
It is installable at the moment but it's under heavy development and the API has not been finalized. However, if you insist on installing it:
devtools::install_github(repo = "cddesja/validateR")
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.