The simplest way to visualize results is using MRIcroGL combined with SPM image calculations.

Create an effect size map of areas of significant effects using SPM
1. [[Optional]] Create a subfolder of the correction method ("V:\LinuxShare\FSL_FIRST\ID111N1045G2\L_Hipp\MNI\TIVagesex\vox\significant_cope")
2. Determine the number of the variable you want to look at; variables are referred to in filenames as "stat1", "stat2",... etc.
3. Copy the corrected p-value file (F statistic) and the glm parameter estimate ("cope" file) into the subfolder.
4. Unzip the *.nii.gz files to create *.nii files (since SPM cannot read *.nii.gz)
5. Open imcalc from the SPM menu (or use attached batch file - click Batch, load "job...*.mat" file)
6. For imput files, select the glm cope tstat file first, then the corrp fstat file
7. Set a filename ("cope_tstat1_p05" could mean parameter estimates of stat1 at p < 0.05)
8. [[recommended]] Set the output directory to be the subfolder
9. Set the equation to be "i1.*(i2>=0.95)"
10. Set the type to be int32 or float32
11. [[optional]] save the batch file
12. Run; this will create a file with direction (t statistic) at areas found to be significant according to permutation F test.
Find the mask.nii.gz file in the vertex folder (like "V:\LinuxShare\FSL_FIRST\ID111N1045G2\L_Hipp\MNI\TIVagesex")
Open in MRIcroGL
Go to File Overlay
From the Overlay GUI, open the created file, and set the color range
If the file has both positive and negative effects, load twice and display separately

Browser not supported