Hi,
I'm also having the same problem. I used @auto_tlrc to convert the anatomical data to standard space and then I used adwarp to convert the functional data to the standard space based on the transformation applied to the anatomical data. Afterwards GLM is applied to the functional data and correlation maps are created with respect to stimulus. When I overlay correlation results onto the anatomical data, the values are much higher than the range of the values. If I overlay the correlation maps on itself or onto the functional data in standard space, I see what I was expecting to see and the values are in the range. I also check the results with the commands 3dBrickStat and 3dInfo as suggested in the previous messages and the max min values are the same. I would appreciate if you could help me solving this interpolation problem and visualize the results on the anatomical data. Attached you can see the GUI screenshots with the data overlayed on the anatomical data and on itself.