Hi, Doug and all,

I have two quesiotns about clusterwise correction for multiple comparsion.

I run 2 corrections,and commands are as follows:

a. mri_glmfit-sim --glmdir g2v0.weight --cache 1.3 abs --cwpvalthresh .05 --2spaces

b. mri_glmfit-sim --glmdir g2v0.weight --cache 1.3 pos --cwpvalthresh .05 --2spaces

Question 1 : Should the postive clusters from result of command a be same as the result from command b? If yes, why cluster size from reslut of command b is lager than postive cluster from command a in my case?(see results)

Resluts form a:

# ClusterNo Max VtxMax Size(mm^2) MNIX MNIY MNIZ CWP CWPLow CWPHi NVtxs Annot

7 5.208 45661 482.74 -6.7 42.3 -22.2 0.01030 0.00900 0.01160 888 medialorbitofrontal

8 5.103 84832 433.13 -32.0 30.7 -2.3 0.02270 0.02080 0.02460 1156 lateralorbitofrontal

Resluts form b:

# ClusterNo Max VtxMax Size(mm^2) MNIX MNIY MNIZ CWP CWPLow CWPHi NVtxs Annot

1 6.483 140982 864.69 -14.8 58.9 -6.1 0.00360 0.00260 0.00479 1416 rostralmiddlefrontal

2 5.103 84832 808.07 -32.0 30.7 -2.3 0.00599 0.00459 0.00739 2186 lateralorbitofrontal

Question 2 : Is the simulation from pre-cached independent from my results waiting for being corrected?

Thanks a lot!

Wilder

2014/06/11