Interpretation of Data (specifically interaction)
I have a question about the interpretation of an interaction. I have attached the output as a picture. Here I would argue that a one factor model of Time (pre vs. post intervention) is best supported by the data. Adding Group as an additional factor makes the BF smaller (by approx. a factor 5). Here comes the tricky part. How should I interpret the two factor model + interaction compared to the one factor model of Time, and specifically: does the data support an interaction? It is slightly better (by a factor 1.25). I would argue that it doesn't add a lot compared to Time Only. My supervisor argues that the two factor+interaction model isn't worse compared to the Time Only model (actually slightly better). So, how should I interpret this correctly. Is there evidence for an interaction or isn't there? Thanks in advance for any advice on this!