My question is whether it is possible to compare differences in Brainstorm. For example, there is a deviant-minus-standard difference (A1-B1) calculated for one deviant-standard condition and the same difference for a different deviant-standard condition (A2-B2). Is it possible to compare statistically the two differences (compare (A1-B1) to (A2-B2)) with a t-test, for example? This is a within-subject comparison. The tutorials only list comaprisons between two stimuli, e.g., A1 to B1.