Hi @mc1 ,
The way that the residuals are plotted are described as:
The Main Effects Residual Plots plot of the residuals from a DSD main effects model fit to all other factors versus the levels of the plotted factor. A factor with residuals that differ across levels indicates an important main effect.
In laymans terms - if you plotted a main effect model for every term excluding the one you're interested in in the Fit Model platform (i..e main effects of X2-X5, leaving X1 out of the model) and saved the residuals, you then plot the missing term to the residuals (X1 to Residuals of X2-X5).
Hope that makes sense!
Thanks,
Ben
“All models are wrong, but some are useful”