Also, just to make this explicit: I'd compare actual statistic (t or F) values, since comparing p-value requires that you also account for one- sided vs. two-sided statistical testing.
-MH On Thu, 2011-05-12 at 09:22 -0400, Gallen, Courtney (NIH/NIDA) [F] wrote: > Ok, tried this out and things are still coming out a little bit odd. > > I manually edited the label file to just include the peak vertex and then > re-ran mri_segstats on that label. When I look at these values in SPSS, > things are still not quite significant (p ~ 0.09). > > Could this have anything to do with the type of multiple comparison > corrections I'm doing in Qdec? Also, is there any documentation on how Qdec > runs the model specified (i.e., is it something like a univariate ANOVA at > each vertex, or some sort of multivariate analysis?). > > Thanks again for your continued help! > Courtney > > -----Original Message----- > From: Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu] > Sent: Wednesday, May 04, 2011 3:42 PM > To: Gallen, Courtney (NIH/NIDA) [F] > Cc: Michael Harms; Freesurfer Mailing List > Subject: Re: [Freesurfer] Interpreting results from Qdec > > You can edit the label by hand to only include one vertex. If you got > the label from a call to mri_surfcluster, then surfcluster will output a > summary file with the max vertex in each cluster. > > doug > > Gallen, Courtney (NIH/NIDA) [F] wrote: > > Thank you so much for your suggestion! > > > > Doug, is there a way to modify the mri_segstats command from before to > > specify coordinates of a vertex (say the peak from the ROI in my contrast)? > > > > Thanks! > > > > > > -----Original Message----- > > From: Michael Harms [mailto:mha...@conte.wustl.edu] > > Sent: Wednesday, May 04, 2011 2:41 PM > > To: Gallen, Courtney (NIH/NIDA) [F] > > Cc: Doug Greve; Freesurfer Mailing List > > Subject: Re: [Freesurfer] Interpreting results from Qdec > > > > > > Hi Gallen, > > I suggest that you extract the values across subjects at a single vertex > > in fsaverage space, and then attempt to duplicate FS's uncorrected t- > > and p-values at that vertex with your SPSS model. Those HAVE to be > > identical if you are truly using the same model (unless there is an > > unknown bug related to GLM statistics in FS, which I think it quite > > unlikely). I vaguely recall myself doing something similar at some > > point (but using SAS instead of SPSS), and the results were indeed the > > same. But you really need to understand the underlying model used by > > both FS and in your case SPSS. > > > > Best, > > -MH > > > > On Wed, 2011-05-04 at 13:57 -0400, Gallen, Courtney (NIH/NIDA) [F] > > wrote: > > > >> Thanks for the reply! > >> I'm fairly certain that I'm using the same model. In Qdec: 2 discrete > >> variables, 1 nuisance variable. In SPSS: a univariate ANOVA with 2 factors > >> and 1 covariate. > >> > >> I understand the difference between Qdec and SPSS may be because Qdec > >> looks at the entire cortex. Are there any realistic ways to work around > >> this using something like SPSS? > >> > >> All I really want is to generate a figure with means for each of my > >> groups, so I can understand what's driving the interaction. Any other > >> suggestions about how to do so? > >> > >> -----Original Message----- > >> From: gr...@nmr.mgh.harvard.edu [mailto:gr...@nmr.mgh.harvard.edu] > >> Sent: Thursday, April 28, 2011 9:06 AM > >> To: Gallen, Courtney (NIH/NIDA) [F] > >> Subject: Re: [Freesurfer] Interpreting results from Qdec > >> > >> Hi Courtney, > >> > >> a couple of suggestions: > >> 1. make sure that QDEC and SPSS are using the identical model. > >> 2. make sure that the values that you are extracting the same as the > >> input to QDEC/glmfit (eg, don't use thickness for one and volume for > >> another). > >> > >> It is possible for the ROI analysis to give very different results, but it > >> usually requires that you select the voxels based on an unsigned statistic > >> (eg, an F-test). This opens the possibility that positives and negatives > >> in the ROI sum to 0. > >> > >> doug > >> > >> > >> > >>> Thanks Jesse. This does sound very similar to my issue. > >>> > >>> How did you resolve the problem? > >>> > >>> Thanks again! > >>> > >>> From: jessebled...@gmail.com [mailto:jessebled...@gmail.com] On Behalf Of > >>> Jesse Bledsoe > >>> Sent: Wednesday, April 27, 2011 1:19 PM > >>> To: Gallen, Courtney (NIH/NIDA) [F]; Freesurfer Mailing List > >>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>> > >>> Hi Courtney, > >>> > >>> I'm no expert but I recalled a post similar to yours awhile ago with the > >>> same question you ask. Doug and Nick offered an answer that may be of > >>> help: > >>> > >>> http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg15586.html > >>> > >>> Jesse > >>> On Wed, Apr 27, 2011 at 1:12 PM, Gallen, Courtney (NIH/NIDA) [F] > >>> <galle...@nida.nih.gov<mailto:galle...@nida.nih.gov>> wrote: > >>> Hi Doug > >>> > >>> Have a follow up question regarding significance levels in Qdec related to > >>> extracting means from ROIs, etc. I'm posting to the entire mailing list in > >>> case anyone else has ideas. > >>> > >>> Basically, I extracted mean volumes (from my set of participants) of ROIs > >>> for which Qdec reports an interaction between two variables. I want to > >>> look at these mean volumes in something like SPSS to see what is driving > >>> the interaction/generate figures, etc. > >>> > >>> I'm having an issue with one such ROI, in that when I extract the mean > >>> volumes and look for this interaction in SPSS, it is not significant (p ~ > >>> 0.5, so really not significant at all). Is there any way that an ROI could > >>> be significant in Qdec (p of 0.05, Monte Carlo sim), but not in SPSS when > >>> I extract means for each participant? > >>> > >>> Let me know if this isn't clear. Any thoughts would be appreciated! > >>> Courtney > >>> > >>> > >>> Courtney Gallen > >>> Post-baccalaureate IRTA > >>> Neuroimaging Research Branch > >>> National Institute on Drug Abuse (IRP) > >>> 251 Bayview Blvd > >>> Suite 200 > >>> Baltimore, MD 21224 > >>> Tel: (443) 740-2631<tel:%28443%29%20740-2631> > >>> > >>> -----Original Message----- > >>> From: Douglas Greve > >>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>> Sent: Tuesday, April 26, 2011 1:06 PM > >>> To: Gallen, Courtney (NIH/NIDA) [F] > >>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>> > >>> Those are the values outside (first column) and inside (2nd col) the > >>> ROI. You can add "--id 1" to only report the values inside the ROI. > >>> > >>> doug > >>> > >>> On 4/26/11 1:02 PM, Gallen, Courtney (NIH/NIDA) [F] wrote: > >>> > >>>> It worked! > >>>> Now, last question. The txt file has two separate values (?averages). > >>>> What do they each represent? > >>>> > >>>> -----Original Message----- > >>>> From: Douglas Greve > >>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>> Sent: Tuesday, April 26, 2011 12:53 PM > >>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>> > >>>> try "--slabel fsaverage lh ROI-drawn-on-QDEC-brain.label" > >>>> > >>>> > >>>> On 4/26/11 12:52 PM, Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>> > >>>>> Actually, I hope I'm wrong about what I thought below. If I specify > >>>>> individual subject's label and run: > >>>>> > >>>>> mri_segstats --in > >>>>> /prot/Mprot/CTQ/freesurferDone/8579/surf/lh.volume.fwhm10.fsaverage.mgh > >>>>> --slabel 8579 lh > >>>>> /prot/Mprot/CTQ/freesurferDone/8579/label/lh.SupTemp_CTQxBDNFctrls.label > >>>>> --avgwf lhSupTempctrls.txt > >>>>> > >>>>> I still get the same error about dimension mismatch > >>>>> > >>>>> > >>>>> -----Original Message----- > >>>>> From: Gallen, Courtney (NIH/NIDA) [F] > >>>>> Sent: Tuesday, April 26, 2011 12:43 PM > >>>>> To: 'Douglas Greve' > >>>>> Subject: RE: [Freesurfer] Interpreting results from Qdec > >>>>> > >>>>> Ah I think I see the problem now. > >>>>> > >>>>> The label I originally specified is the general label created from the > >>>>> ROI drawing in Qdec. Instead, I should use the individual subject's > >>>>> label (from 'Map Label to Subjects') instead, right? > >>>>> > >>>>> Thank you! > >>>>> > >>>>> -----Original Message----- > >>>>> From: Douglas Greve > >>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>> Sent: Tuesday, April 26, 2011 12:38 PM > >>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>> > >>>>> You have to use the subject that matches the input, fsaverage in this > >>>>> case. How did you define your label? If you defined it on subject 123, > >>>>> you can transfer it to fsaverage using mri_label2label. > >>>>> doug > >>>>> > >>>>> On 4/26/11 12:28 PM, Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>> > >>>>>> Not a problem at all! > >>>>>> > >>>>>> If I use --in, I get an error saying that there is a dimension > >>>>>> mismatch between input volume and seg. > >>>>>> > >>>>>> Any other thoughts? Thanks again! > >>>>>> > >>>>>> -----Original Message----- > >>>>>> From: Douglas Greve > >>>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>>> Sent: Tuesday, April 26, 2011 11:40 AM > >>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>> > >>>>>> > >>>>>> Hi Courtney, sorry for the delay. If more than a few days go by > >>>>>> without > >>>>>> a response, feel free to repost -- I promise not to get annoyed! > >>>>>> Sometimes, things get pushed up and out of my mail browser window, and > >>>>>> I > >>>>>> often don't get back to them. Sorry! > >>>>>> > >>>>>> To answer your question, try using --in where you have --seg. The > >>>>>> "segmentation" is actually already specified because you've specified > >>>>>> a > >>>>>> label. > >>>>>> > >>>>>> doug > >>>>>> > >>>>>> On 4/26/11 11:03 AM, Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>>> > >>>>>>> Hi Doug, > >>>>>>> Sorry to keep bugging you but any thoughts about my response to your > >>>>>>> e-mail from 2 weeks ago? I've given the exact command line I'm using > >>>>>>> with mri_segstats. > >>>>>>> Thanks again for all your help > >>>>>>> Courtney > >>>>>>> > >>>>>>> -----Original Message----- > >>>>>>> From: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>> Sent: Tuesday, April 12, 2011 10:59 AM > >>>>>>> To: 'Douglas N Greve' > >>>>>>> Subject: RE: [Freesurfer] Interpreting results from Qdec > >>>>>>> > >>>>>>> That may be the problem. ${sub} is an actual person's directory > >>>>>>> > >>>>>>> E.g., sub# 123--command line would be: > >>>>>>> mri_segstats --seg > >>>>>>> /prot/Mprot/CTQ/freesurferDone/123/surf/lh.volume.fwhm10.fsaverage.mgh > >>>>>>> --slabel 123 lh \ > >>>>>>> lh.SupTemp_CTQxBDNFctrls.label --avgwf lhSupTempctrls.txt > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> -----Original Message----- > >>>>>>> From: Douglas N Greve > >>>>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>>>> Sent: Tuesday, April 12, 2011 10:55 AM > >>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>> > >>>>>>> What is your full command-line? Without variables, just something > >>>>>>> that > >>>>>>> you could put directly into the terminal. Make sure that you are > >>>>>>> specifying fsaverage as your subject (can't tell below because your > >>>>>>> use > >>>>>>> ${sub}). > >>>>>>> > >>>>>>> doug > >>>>>>> > >>>>>>> > >>>>>>> Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>>>> > >>>>>>>> Sorry, but I can't seem to figure out how to specify input data. I > >>>>>>>> tried '--in' but get an error that the input vol and seg label are > >>>>>>>> not the same dimensions. I've been looking at the help options for > >>>>>>>> mri_segstats (http://surfer.nmr.mgh.harvard.edu/fswiki/mri_segstats) > >>>>>>>> but don't see it > >>>>>>>> > >>>>>>>> -----Original Message----- > >>>>>>>> From: Douglas N Greve > >>>>>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>>>>> Sent: Friday, April 08, 2011 10:38 AM > >>>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>>> > >>>>>>>> The lh.volume.fwhm10.fsaverage.mgh should be your input. It is not > >>>>>>>> a > >>>>>>>> segmentation. You've already specified the seg with the the --slabel > >>>>>>>> command. > >>>>>>>> doug > >>>>>>>> > >>>>>>>> > >>>>>>>> Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>>>>> > >>>>>>>> > >>>>>>>>> One last question (hopefully). I'm specifying the input volume with > >>>>>>>>> --seg, but am getting an error ('cannot do frame average without > >>>>>>>>> input volume'). Am I missing something obvious? > >>>>>>>>> > >>>>>>>>> The entire command looks something like this: > >>>>>>>>> mri_segstats --seg > >>>>>>>>> /prot/Mprot/CTQ/freesurferDone/${sub}/surf/lh.volume.fwhm10.fsaverage.mgh > >>>>>>>>> --slabel ${sub} lh \ > >>>>>>>>> lh.SupTemp_CTQxBDNFctrls.label --avgwf lhSupTempctrls.txt > >>>>>>>>> > >>>>>>>>> Thanks again > >>>>>>>>> -----Original Message----- > >>>>>>>>> From: Douglas N Greve > >>>>>>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>>>>>> Sent: Tuesday, April 05, 2011 4:21 PM > >>>>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>>>> Cc: Nick Schmansky; Freesurfer Mailing List > >>>>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>>>> > >>>>>>>>> yes, something like ?h.volume.fwhm10.fsaverage.mgh > >>>>>>>>> doug > >>>>>>>>> > >>>>>>>>> Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >>>>>>>>>> Hi Doug > >>>>>>>>>> > >>>>>>>>>> Thanks for helping me with this! > >>>>>>>>>> > >>>>>>>>>> First time around I did everything as is outlined in 'Define a > >>>>>>>>>> Region of Interest' here: > >>>>>>>>>> http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis. > >>>>>>>>>> > >>>>>>>>>> I'll try your suggestion now. The input data would be something > >>>>>>>>>> like ?h.volume.fwhm10.fsaverage.mgh, correct? > >>>>>>>>>> > >>>>>>>>>> Thanks again > >>>>>>>>>> Courtney > >>>>>>>>>> > >>>>>>>>>> -----Original Message----- > >>>>>>>>>> From: Douglas N Greve > >>>>>>>>>> [mailto:gr...@nmr.mgh.harvard.edu<mailto:gr...@nmr.mgh.harvard.edu>] > >>>>>>>>>> Sent: Thursday, March 31, 2011 5:44 PM > >>>>>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>>>>> Cc: Nick Schmansky; Freesurfer Mailing List > >>>>>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>>>>> > >>>>>>>>>> Hi Courtney, did you transfer the label to each individual subject > >>>>>>>>>> using > >>>>>>>>>> mri_label2label? A better way to replicate your qdec results is to > >>>>>>>>>> run > >>>>>>>>>> mri_segstats on the input data to qdec (y.mgh usually). Specify > >>>>>>>>>> the > >>>>>>>>>> label with "--slabel subject hemi yourlabel". Also specify > >>>>>>>>>> "--avgwf > >>>>>>>>>> subjectdata.txt". This will create this text file with a list of > >>>>>>>>>> the > >>>>>>>>>> input data for each subject averaged over your label. > >>>>>>>>>> > >>>>>>>>>> doug > >>>>>>>>>> > >>>>>>>>>> Gallen, Courtney (NIH/NIDA) [F] wrote: > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>>> Hi Nick > >>>>>>>>>>> > >>>>>>>>>>> I'm revisiting this issue and have a few more questions. First, I > >>>>>>>>>>> have a significant interaction between two variables on cortical > >>>>>>>>>>> volume. I drew a label on this ROI and ran mris_anatomical_stats > >>>>>>>>>>> on the label (thank you for that suggestion). > >>>>>>>>>>> > >>>>>>>>>>> For stats in the output table file, is the column 'GrayVol' the > >>>>>>>>>>> same thing as the cortical volume I looked at in Qdec? I'm asking > >>>>>>>>>>> because when I export GrayVol values into SPSS, there is no > >>>>>>>>>>> longer a significant interaction between my variables (and if > >>>>>>>>>>> this ROI is significant after multiple comparisons across the > >>>>>>>>>>> brain, I'd expect the mean volume from the ROI to be very > >>>>>>>>>>> significant in SPSS). > >>>>>>>>>>> > >>>>>>>>>>> Please let me know if my questions aren't clear. Thanks in > >>>>>>>>>>> advance > >>>>>>>>>>> Courtney > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> Courtney Gallen > >>>>>>>>>>> Post-baccalaureate IRTA > >>>>>>>>>>> Neuroimaging Research Branch > >>>>>>>>>>> National Institute on Drug Abuse (IRP) > >>>>>>>>>>> 251 Bayview Blvd > >>>>>>>>>>> Suite 200 > >>>>>>>>>>> Baltimore, MD 21224 > >>>>>>>>>>> Tel: (443) 740-2631<tel:%28443%29%20740-2631> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> -----Original Message----- > >>>>>>>>>>> From: Nick Schmansky > >>>>>>>>>>> [mailto:ni...@nmr.mgh.harvard.edu<mailto:ni...@nmr.mgh.harvard.edu>] > >>>>>>>>>>> Sent: Thursday, January 13, 2011 3:08 PM > >>>>>>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>>>>>> Cc: Freesurfer Mailing List > >>>>>>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>>>>>> > >>>>>>>>>>> Courtney, > >>>>>>>>>>> > >>>>>>>>>>> if i understand your question, i think one way to do that is to > >>>>>>>>>>> use qdec > >>>>>>>>>>> to draw a label on the blob of interest, and the run 'map label > >>>>>>>>>>> to > >>>>>>>>>>> subjects', which creates a label file in each subjects label dir, > >>>>>>>>>>> then > >>>>>>>>>>> you can run stats on that with mris_anatomical_stats. > >>>>>>>>>>> > >>>>>>>>>>> (btw, i'm putting this answer on the list, as others may have > >>>>>>>>>>> better > >>>>>>>>>>> ideas.) > >>>>>>>>>>> > >>>>>>>>>>> n. > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> On Mon, 2011-01-03 at 16:38 -0500, Gallen, Courtney (NIH/NIDA) > >>>>>>>>>>> [F] > >>>>>>>>>>> wrote: > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>>> Hi Nick > >>>>>>>>>>>> > >>>>>>>>>>>> Thanks for the prompt reply. Sorry if my questions seem a bit > >>>>>>>>>>>> naïve--this is my first time using Freesurfer. > >>>>>>>>>>>> > >>>>>>>>>>>> A follow up question to your answer for question 1. I see that > >>>>>>>>>>>> the group data will be plotted in Qdec for significant blobs, > >>>>>>>>>>>> but say there is a significant interaction between two variables > >>>>>>>>>>>> and it's not entirely apparent what is driving this interaction. > >>>>>>>>>>>> Is there a way to extract the mean of this blob for each > >>>>>>>>>>>> individual (i.e., treat it as an ROI or something similar) to > >>>>>>>>>>>> determine what's driving the significance? > >>>>>>>>>>>> > >>>>>>>>>>>> Thanks in advance! > >>>>>>>>>>>> Courtney > >>>>>>>>>>>> > >>>>>>>>>>>> -----Original Message----- > >>>>>>>>>>>> From: Nick Schmansky > >>>>>>>>>>>> [mailto:ni...@nmr.mgh.harvard.edu<mailto:ni...@nmr.mgh.harvard.edu>] > >>>>>>>>>>>> Sent: Thursday, December 30, 2010 2:44 PM > >>>>>>>>>>>> To: Gallen, Courtney (NIH/NIDA) [F] > >>>>>>>>>>>> Cc: > >>>>>>>>>>>> freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu> > >>>>>>>>>>>> Subject: Re: [Freesurfer] Interpreting results from Qdec > >>>>>>>>>>>> > >>>>>>>>>>>> ans. 1. - the easiest way is to Ctrl- left mouse click on a > >>>>>>>>>>>> blob, and a > >>>>>>>>>>>> plot of the data at that surface vertex will appear. the group > >>>>>>>>>>>> will be > >>>>>>>>>>>> apparent from that (say, demented group is thinner than > >>>>>>>>>>>> non-demented > >>>>>>>>>>>> group). this data is significance data (log p, so '2' is 0.01), > >>>>>>>>>>>> so mean > >>>>>>>>>>>> and stdev wouldnt apply in that case. the file 'y.mgh' is the > >>>>>>>>>>>> raw data > >>>>>>>>>>>> of all subjects in the analysis, so you could extract mean and > >>>>>>>>>>>> stdev > >>>>>>>>>>>> from that. > >>>>>>>>>>>> > >>>>>>>>>>>> ans. 2. - slide the 'annotation' opacity slider to show the > >>>>>>>>>>>> annotation > >>>>>>>>>>>> data (cortical parcellation). the ctrl left click will also put > >>>>>>>>>>>> the > >>>>>>>>>>>> region info for that vertex on the lower left of the display. > >>>>>>>>>>>> > >>>>>>>>>>>> see also: > >>>>>>>>>>>> http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis > >>>>>>>>>>>> > >>>>>>>>>>>> n. > >>>>>>>>>>>> > >>>>>>>>>>>> On Wed, 2010-12-29 at 10:49 -0500, Gallen, Courtney (NIH/NIDA) > >>>>>>>>>>>> [F] > >>>>>>>>>>>> wrote: > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>>> Hi, > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> I'm currently running analyses in Qdec and have identified > >>>>>>>>>>>>> areas that > >>>>>>>>>>>>> show significant effects in my contrasts. I have two questions > >>>>>>>>>>>>> related > >>>>>>>>>>>>> to interpreting these results. > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> 1. How can you interpret the effect in each "blob?" (i.e., > >>>>>>>>>>>>> which > >>>>>>>>>>>>> group has a greater cortical surface area, etc.). Right now, > >>>>>>>>>>>>> all I > >>>>>>>>>>>>> know is that there is an effect in certain areas. Can you > >>>>>>>>>>>>> export this > >>>>>>>>>>>>> data to get means and standard errors? > >>>>>>>>>>>>> > >>>>>>>>>>>>> 2. Is there a way to localize where these effects are? > >>>>>>>>>>>>> E.g., a > >>>>>>>>>>>>> tool that tells you this effect is located in __ area of the > >>>>>>>>>>>>> brain? > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> Thanks in advance > >>>>>>>>>>>>> > >>>>>>>>>>>>> Courtney > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> Courtney Gallen > >>>>>>>>>>>>> > >>>>>>>>>>>>> Post-baccalaureate IRTA > >>>>>>>>>>>>> > >>>>>>>>>>>>> Neuroimaging Research Branch > >>>>>>>>>>>>> > >>>>>>>>>>>>> National Institute on Drug Abuse (IRP) > >>>>>>>>>>>>> > >>>>>>>>>>>>> 251 Bayview Blvd > >>>>>>>>>>>>> > >>>>>>>>>>>>> Suite 200 > >>>>>>>>>>>>> > >>>>>>>>>>>>> Baltimore, MD 21224 > >>>>>>>>>>>>> > >>>>>>>>>>>>> Tel: (443) 740-2631<tel:%28443%29%20740-2631> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> _______________________________________________ > >>>>>>>>>>>>> Freesurfer mailing list > >>>>>>>>>>>>> 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. > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>>> > >>>>>>>>>>> _______________________________________________ > >>>>>>>>>>> Freesurfer mailing list > >>>>>>>>>>> Freesurfer@nmr.mgh.harvard.edu<mailto:Freesurfer@nmr.mgh.harvard.edu> > >>>>>>>>>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >>>>>>>>>>> > >>>>>>>>>>> _______________________________________________ > >>>>>>>>>>> Freesurfer mailing list > >>>>>>>>>>> Freesurfer@nmr.mgh.harvard.edu<mailto:Freesurfer@nmr.mgh.harvard.edu> > >>>>>>>>>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>>>>>>>>>> > >>> _______________________________________________ > >>> Freesurfer mailing list > >>> Freesurfer@nmr.mgh.harvard.edu<mailto:Freesurfer@nmr.mgh.harvard.edu> > >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >>> > >>> > >>> > >>> -- > >>> Jesse C. Bledsoe, M.A. > >>> Ph.D. Candidate, Clinical Psychology > >>> Consortium for Neurodevelopmental Study > >>> Department of Psychology > >>> 110E Psychology Building > >>> Michigan State University > >>> East Lansing, MI 48824 > >>> ______________________________________ > >>> > >>> Note: Information contained in this electronic message and any attachments > >>> to this message are intended for the exclusive use of the addressee(s) and > >>> may contain proprietary, confidential or privileged information. If you > >>> are > >>> not the intended recipient, you should not disseminate, distribute or copy > >>> this e-mail. Please notify the sender immediately and destroy all copies > >>> of > >>> this message and any attachments. > >>> > >>> _______________________________________________ > >>> Freesurfer mailing list > >>> Freesurfer@nmr.mgh.harvard.edu > >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >>> > >> _______________________________________________ > >> Freesurfer mailing list > >> 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 > Phone Number: 617-724-2358 > Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
