Well, solved the problem for all but one ttest. I had some misordering of the input data, unfortunately. The ttest I having a problem with now is a little bit special, I guess. Factor a in group, b is condition, and the test looks like this:
CSChoice-MAChoice
16
150
1
160
1
170
1
180
1
190
1
1a0
1
1b0
1
1c0
1
250
-1
260
-1
270
-1
280
-1
290
-1
2a0
-1
2b0
-1
2c0
-1
Again, the results are very large values all over the brain.
-Daniel