Hi, professor, I performed the statistical analysis between two groups first in left hemisphere, and got some regions which showed different. 1) so if I then do multiple correction, i don't need to run the mri_glmfit-sim command, and just press the button of the monte carlo null-z simulation in the qdec interface, am i right?

2) Whether mri_glmfit-sim --cache command line and the mc-z in qdec get the same results, or not? and as to the option --cwpvalthresh, should i choose 0.05 or 0.025? 3) And what is the difference between fdr and mc-z correction? Thanks, Meng

Hi Meng, if you are doing whole hemisphere correction, it will used already computed values which should only take a few seconds to run. doug

On 07/05/2012 11:03 AM, Meng Li wrote:

Hi, all,

I have some questions about the multiple correction in qdec.

I performed group analysis using qdec. There are 5 factors in the qdec.table.dat file: 1 discrete, 4 continuous variables (covariates). When I tried to perform the multiple correction, Whether I can choose one of two ways (the fdr and monte carlo null-z simulation) only. And if I use monte carlo null-z simulation, I have to pre-run mri_glmfit-sim 10000?

Thanks,

Meng