In my last post, I described a (mostly) successful replication by Steegen et al. of the ”crowd-within effect.” The authors of that replication effort felt that it would be nice to mention all the good replication research practices that they had implemented in their replication effort. And indeed, positive psychologist that I am, I would be remiss if I didn’t extol the virtues of the approach in that exemplary replication paper, so here goes. Make sure you have sufficient power. We all know this, right? Preregister your hypotheses, analyses, and code. I like how the replication authors went all out in preregistering their study. It is certainly important to have the proposed analyses and code worked out up front. Make a clear distinction between confirmatory and exploratory analyses. The authors did here exactly as the doctor, A.D. de Groot in this case , ordered. It is very useful to perform exploratory analyses but they should be separated clearly from the