The Center for Lifespan Psychology GNU General Public License (GPL) Yes Max Planck Institute for Human Development NITRC VarTbx – Variability Toolbox OS Independent MATLAB Stefan Schmidt VarTbx measures within-voxel time series variability in fMRI data. The VarTbx structure is intended to be similar to a standard SPM first-level analysis. You can then proceed to pass those first-level, variability-based images to a level-2 SPM analysis in order to model group effects of interest. However, the first-level NIFTI output files could also be used within other statistics programs of your choice (e.g., FSL, AFNI, PLS). VarTbx currently supports modeling block designs with a boxcar model, and computes temporal variability using measures such as: detrended variance (VAR), detrended standard deviation (SD), mean squared successive difference (MSSD), and SQRT(MSSD). We plan to add additional modeling approaches and variability measures in future releases. 2015-1-21 4 - Beta vartbx VarTbx – Variability Toolbox MR, GNU General Public License (GPL), Time Domain Analysis, 4 - Beta, End Users, Developers, English, OS Independent, MATLAB, NIfTI-1 http://www.nitrc.org/projects/vartbx/, http://www.nitrc.org/projects/vartbx/ sschmidt@mpib-berlin.mpg.de