Hi,
Anyone here has the experience of analyzing fMRI scan of the
Sterberg Item Recognition Paradigm (SIRP) experiment?
I tried to use 3dDeconvolve with 6 stimuli: arrow, probe 1, 3, 5, encoding and crosshair,
but the reported R**2 for the overall fitting was lower than 0.3. Any suggestions?
I also tried 3dttest, 3dMannWhitney, and 3dANOVA to compare the SIRP scan
with the resting scan and found nothing interesting.
In all cases, the 3d+time EPI data were not preprocessed (except using 3dvolreg
to register each sub-brick to a common sub-brick). If preprocessing (e.g. filtering)
is suggested, what are the proper preprocessing steps?
Thank you in advance,
George
