Hi Laura, you would only need to run preproc multiple times if the subjects changed between analyses. If it is the same subjects in the same order, then you only need to run it once.
doug

On 3/15/13 4:42 PM, Laura M. Tully wrote:

Hi freesurfer experts, 

I'm planning to run a few different glms on surface data using glm_fit e.g. diagnosis * age; diagnosis * age * symptoms; diagnosis * age * somebehavioral variable etc.. 

Do I have to run mris_preproc using the specific fsgd file for each glm? My data are already qcached, and it seems that there may be an option (-cache--in?) that I can use on just one mris_preproc but I'm not sure if this is correct, or what the -cache--in option does. 

Thanks! 

Laura. 

--
--
Laura M. Tully, MA
Social Neuroscience & Psychopathology, Harvard University
Center for the Assessment and Prevention of Prodromal States, UCLA Semel Institute of Neuroscience
ltully@mednet.ucla.edu 
ltully@fas.harvard.edu
310-267-0170
--

Follow me on Twitter: @tully_laura

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