This project is a continuation of

Veldkamp, C. L. S., Nuijten, M. B., Dominguez-Alvarez, L., van Assen, M. A. L. M., & Wicherts, J. M. (2014). Statistical reporting errors and collaboration on statistical analyses in psychological science. PloS One, 9(12), e114876.

in which we move from survey methods to data from journals. In the PLOS family of journals, contributions are reported by default, so we use these to replicate the referred paper and extend it.