This is an R package used to do the reliability analysis. While the packaging is not finished, the key functions are there.
Introduction
These functions were written to handle computation of Krippendorff’s Alpha reliability index in the case of large, sparse matrices typical of crowdsourced/citizen-science efforts. After three years sitting on them thinking “I should really package this”, I decided to provide them online as-is in case they could help someone. Who knows, with some time I might even be able to do a nicer package!
Features
This package:
- computes Krippendorff’s Alpha as was described in Krippendorf (2011) Computing Krippendorff’s Alpha-Reliability.
- should work for binary and for nominal variables alike
- returns
- alpha: Krippendorff’s Alpha reliability index
- De: Expected disagreement
- Do: Overall observed disagreement across all unitsis optimised for computational speed, using R’s most efficient data structure
data.table - handles graciously sparse annotation matrices, by requiring only the present and absent entries, not the “not coded” ones.
- also includes a Bootstrapped version. Note: I am not satisfied on my math on that poin. There are some choices to be made about the resampling that I never had the time to investigate to their full extent.
The computation-heavy parts are in C++ under the hood, for computational efficiency
Installation
At the moment this package is not on CRAN. You can install it using the remotes package:
remotes::install_github("jucor/krippendorff")TODO(jucor)
- Finish a proper packaging, including a vignette
- Check that the unit tests still run
- Add continuous integration and nice labels in the README ;-)
- Check proper generation of the documentation with Roxygen
- Create a simple GH-pages for the package
-
Replace
packratbyrenv - Publish to CRAN
- Review bootstrapping
- Check current alpha name from Krippendorff 2020 draft
- Implement majority vote vs expert (with proper name)
