On 01/28/2014 03:26 PM, Natasha Haris wrote: > Oops sorry! > > I guess my question then is, after running the monte carlo simulation > with this cluster-forming threshold (p<0.01), is there a specific > corrected (clusterwise) threshold I can/am supposed to place in the > Threshold min box? Or are these two not related in any way. They are not related. The clusterwise threshold is what you would use when you go to convince a reviewer that the effect is significant. Usually, this is .05. > > Natasha > > > On Tue, Jan 28, 2014 at 12:11 PM, Douglas N Greve > <gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>> wrote: > > > Hi Natasha, please remember to post to the list! When you say a > different set of blobs, do you mean that none of the original > blobs are there? Or do some of the blobs just disappear? Note that > the threshold you use in the simulation is not related to the > "Threshold Min". In this case, the Threshold Min is the corrected > threshold (clusterwise). The threshold used in the simulation is > the "cluster forming threshold" > > doug > > > > > > > On 01/28/2014 02:51 PM, Natasha Haris wrote: > > Thank you! Additionally, after running the clusterwise Monte > carlo simulation with p<0.01 I get a blob. After placing this > value in the threshold min box I get a different set of blobs > on my image. Why is this? > > Natasha > > > On Tue, Jan 28, 2014 at 11:41 AM, Douglas N Greve > <gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>>> wrote: > > > Yes, when looking at the corrected images, the Threshold Min > because the clusterwise threshold. So if you want to see only > clusters that have a clusterwise p<.05, set that threshold > to 1.3 > > doug > > > > > > > On 01/28/2014 02:24 PM, Natasha Haris wrote: > > The clusterwise simulation runs with a p<0.05 > threshold value > and a blob appears. However, am I supposed to enter this > threshold value corresponding to p<0.05 (namely 1.3) > into the > box labeled threshold min= ? > > > On Mon, Jan 27, 2014 at 8:43 AM, Douglas N Greve > <gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu> > > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>>>> wrote: > > > On 01/24/2014 11:54 AM, Natasha Haris wrote: > > Dear Freesurfers, > > > > I am slightly confused about the monte carlo > simulation. > > > > First off, I only find a blob when I run the p<0.05 > threshold > level and don't see anything else when I run > simulations > with p > less than that. What does this mean? > Which threshold level? clusterforming/voxelwise or > clusterwise? If > clusterwise, then it just means that you have a > cluster > whose p > value is > just under .05 so you lose it by going to a more > stringent > threshold. > > > > Additionally, when I click on any question of > interest after > running this p<0.05 simulation (for ex. "Does the > average > thickness, accounting for Group, differ between > male and > female?" > I get the same blobs that I found before I ran this > precomputed > simulation. Is the simulation not running > correctly? Am I > supposed > to enter this threshold value (1.3) into the area > marked > Threshold > min= and max=5. > Are you sure it is exactly the same? Look to see > if there > are some > very > small blobs that disappear. Otherwise, it may be > that the > blobs > you have > are all significant. > > > > Thank you for your help! > > Natasha > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu>> > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu>>> > > > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > > > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu> > > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>>> > Phone Number: 617-724-2358 <tel:617-724-2358> > <tel:617-724-2358 <tel:617-724-2358>> > <tel:617-724-2358 <tel:617-724-2358> <tel:617-724-2358 > <tel:617-724-2358>>> > Fax: 617-726-7422 <tel:617-726-7422> > <tel:617-726-7422 <tel:617-726-7422>> <tel:617-726-7422 > <tel:617-726-7422> > > <tel:617-726-7422 <tel:617-726-7422>>> > > Bugs: > surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > Outgoing: > ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu>> > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu>>> > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only > for the > person to > whom it is > addressed. If you believe this e-mail was sent to > you in > error and > the e-mail > contains patient information, please contact the > Partners > Compliance HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to > you in error > but does not contain patient information, please > contact the > sender and properly > dispose of the e-mail. > > > > -- Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>> > Phone Number: 617-724-2358 <tel:617-724-2358> > <tel:617-724-2358 <tel:617-724-2358>> > Fax: 617-726-7422 <tel:617-726-7422> <tel:617-726-7422 > <tel:617-726-7422>> > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > Outgoing: > ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > Phone Number: 617-724-2358 <tel:617-724-2358> > Fax: 617-726-7422 <tel:617-726-7422> > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > Outgoing: > ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > >
-- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
