Create README.md

Author: markallenthornton

README.md

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+# MatlabTFCE
+Standalone MATLAB implementation of permutation TFCE correction
+
+This package offers a standalone implemetation of multiple comparison
+correction for fMRI data. It achieves this through a permutation testing
+approach which controls familywise error rate by comparing voxelwise
+statistics to the maximal statistics obtained from repeating the analysis
+with randomized data. See Nichols & Holmes (2002) for a detailed
+treatment of this approach. 
+
+This maximal permuted statistic correction technique is combined
+with the threshold free cluster enhancement (TFCE) transformation due to
+Smith & Nichols (2009), which obviates the need for arbitrary voxelwise
+cluster-forming thresholds and instead produces continuous correct
+p-values for all voxels. Although some spatial specifity is lost
+relative to purely voxelwise approach, this approach, like cluster
+corrections, is substantially less conservative due to the fact that
+it capitalizes on spatial dependency in the data.
+
+All functionality in the package can be accessed via matlab_tfce.m and
+that file also provides a description of the relevant parameters. The
+file matlab_tfce_gui.m provides a convenient user interface.