¥ Solving a visually presented puzzle:
a) subject sees puzzle
b) subject cogitates a while
c) subject responds with solution
¥ The problem is that we expect some voxels to be significant in phase (b) as well as
phases (a) and/or (c)
¥ Variable length of phase (b) means that shape for its response varies between
trials
HWhich is contrary to
the whole idea of averaging trials together to get decent
statistics (which is basically what linear regression amounts to, in
a fancy sort of way)
¥ Could assume response amplitude in phase (b) is constant across trials, and
response duration varies directly with time between phases (a) and
(c)
HNeed three HRFs;
phase (b)Õs is a little tricky to generate using waver, but it could
be done