Re: [Freesurfer] single subject versus a group map in qdec

2011-03-31 Thread Douglas N Greve
Hi Emily, it is just performing a two group analysis, where one of your groups only has a single subject. There is nothing wrong with what you did, it all comes down to what conclusion you are trying to draw from it. I think it is ok for a case report. doug Emily Rogalski wrote: Using q dec

Re: [Freesurfer] single subject versus a group map in qdec

2011-03-24 Thread Derin Cobia
I'm curious about the use of this method as well (thanks for the paper PPJ). Bruce/Doug, how exactly does QDEC treat this design? Can a single-subject comparison properly be done? Thanks. -Derin On Mar 23, 2011, at 4:11 PM, Pedro Paulo de Magalhães Oliveira Junior wrote: We have dono

[Freesurfer] single subject versus a group map in qdec

2011-03-23 Thread Emily Rogalski
Using q dec we have run a single patient versus a group of healthy control subjects (n=20ish) and found significant differences even after FDR correction. Could you describe the process qdec uses to compute these differences? Is it legitimate to report these single subject maps? Practically this

Re: [Freesurfer] single subject versus a group map in qdec

2011-03-23 Thread Pedro Paulo de Magalhães Oliveira Junior
We have dono something like this in Cortical thickness reduction of normal appearing cortex in patients with polymicrogyriahttps://surfer.nmr.mgh.harvard.edu/pub/articles/corticalPedroSep08.pdf https://surfer.nmr.mgh.harvard.edu/pub/articles/corticalPedroSep08.pdf cheers, PPJ