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mdm.computeglm [2010/06/09 16:20] – created jochenmdm.computeglm [2010/06/16 17:18] – changed PRT and SDM texts to links to their file format pages jochen
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 ===== Motivation ===== ===== Motivation =====
-To combine several subjects' data into one compound analysis, it is custom to compute random-effects statistics on the second level. The MDM file format of BrainVoyager QX references the required time-course files (VTC or MTC) and the respective information containing the model (onsets in PRT files or regressors in SDM files).+To combine several subjects' data into one compound analysis, it is custom to compute random-effects statistics on the second level. The MDM file format of BrainVoyager QX references the required time-course files (VTC or MTC) and the respective information containing the model (onsets in [[xff - PRT format|PRT]] files or regressors in [[xff - SDM format|SDM]] files).
  
 This method then allows to perform the regression on a session-by-session basis and combine the results in one compound GLM object. This method then allows to perform the regression on a session-by-session basis and combine the results in one compound GLM object.
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 This function is currently implemented for BrainVoyager QX's GLM format only. The following files must be available: This function is currently implemented for BrainVoyager QX's GLM format only. The following files must be available:
   * VTC (or MTC) files for all runs of all subjects (e.g. the ones automatically created by spm5_preprojobs, for how to name files see below)   * VTC (or MTC) files for all runs of all subjects (e.g. the ones automatically created by spm5_preprojobs, for how to name files see below)
-  * PRT (or the derived SDM) files for all runs (if subjects share this information, only one file is needed for each uniquely specified model!) +  * [[xff - PRT format|PRT]] (or the derived [[xff - SDM format|SDM]]) files for all runs (if subjects share this information, only one file is needed for each uniquely specified model!) 
-  * optionally the realignment parameter files (supported formats: TXT for SPM rp*.txt files, SDM for BV's motion correction output)+  * optionally the realignment parameter files (supported formats: TXT for SPM rp*.txt files, [[xff - SDM format|SDM]] for BV's motion correction output)
  
 **Note: The combination of within-subjects regressors (e.g. same condition across several runs) is done by identifying the subject ID as the particle of the time-course filename before the first underscore character!** This means that VTC (or MTC) filenames **must be named** as follows: **Note: The combination of within-subjects regressors (e.g. same condition across several runs) is done by identifying the subject ID as the particle of the time-course filename before the first underscore character!** This means that VTC (or MTC) filenames **must be named** as follows:
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 Starting from scratch, the user has to do the following steps: Starting from scratch, the user has to do the following steps:
   * locate the filenames of the VTC (or MTC and SSM/TSM) files to be regressed   * locate the filenames of the VTC (or MTC and SSM/TSM) files to be regressed
-  * locate the filenames of the PRT (or SDM) files to be used as regressors (model)+  * locate the filenames of the [[xff - PRT format|PRT]] (or [[xff - SDM format|SDM]]) files to be used as regressors (model)
   * optionally locate the filenames of the realignment parameter files   * optionally locate the filenames of the realignment parameter files
   * make settings in the MDM structure   * make settings in the MDM structure
mdm.computeglm.txt · Last modified: 2011/04/03 01:21 by jochen