Hi Alex,

As far as I can tell, I think you should be fine with the current contrasts. If you wanted to check a few manually, you could simply take the beta maps and compute the contrast by hand and make sure it matches.

The change to c is never saved as far as I can tell.

However, you may want to consider the concatenation option for these models as session 5 only has 2 trials for GS_5cent. This will cause the PPI columns to be collinear with the non-PPI columns, which will lead to unstable estimates. This is also why the c+ warning was issued.

Best,
Donald