Custom Contrasts in JASP RM Anova: different df calculation (and error pooling) in 0.14.1 and 0.16.3
As I am currently running a replication study, I wanted to replicate some MIXED-ANOVA results from last year (JASP version 0.14.1). However, when I did so using my actual version of JASP (0.16.3), the same input led to strongly changed degrees of freedom and error terms in the tests for custom contrasts. Here are the results:
I thought both analyses should reproduce the same results (they were performed on the same data-set). But they differ regarding dfs and errors for the custom contrasts (but not in any other parameters). Does anyone know if JASP changed something in the calculation of contrasts for MIXED Anova? And if so: It is documented somewhere, so that I can refer to it? What is the difference between the two approaches?
I also posted a potential bug on GitHub, but did not get an answer yet: https://github.com/jasp-stats/jasp-issues/issues/1946
But because time is a bit pressing I wanted to ask here again if anyone has an idea or an explanation for this behavior of JASP?
Thank you very much in Advance!