Dear all,
Hope the analysis are flowing for you :)
We are running a multiple regression analysis in 2nd level to catch
the differences of 3 levels of memory (20%, 40% and 60%). After
inserting the con_*.img files they are weighted in a Covariate with
20, 40 or 60 (the vector corresponds to the scans in input).
Now we have a design matrix of 2 columns, one is the covariate and the
other the mean. We are running various contrasts ([1 -1], [-1 1]) etc,
but we don't understand what are we contrasting exactly (even though
the results are nice for what we expect).
Can somebody help on the topic? Attached you can find the Covariates
matrix and the example of the fitted response for one contrast.
Best Regards.
Dorian.
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