This project page includes data, R code, and codebook for the blog post, "The Content of My Peer Reviews Did Not Change Once I Started Signing Them," https://getsyeducated.blogspot.com/2020/02/the-content-of-my-peer-reviews-did-not.html
The data file includes the full LIWC results of the 203 reviews, but not the actual text of the reviews. Those can be obtained by request from moin@umn.edu.
The file LIWC2007LanguageManual serves as a codebook for the LIWC results in the data file.