I'm not sure if it is the correct place to ask this question, but I don't know where to search for help otherwise.
I used R and a few models to analyse my results for my master paper.
However, I'm not really used to use R.... So, I need to have a reference for the R-model I used, however I found this method with search on the internet and not from a specific article.
I used the polr-function from the MASS-package en the Brant test to check assumptions.
How can I find references for these?
Thanks in advance.