Hi Alfonso et al.,

Before describing my question, I want to thank you and the other CONN folks for providing this wonderful tool and for maintaining this forum. It's a remarkable feat! 

Earlier today, I noticed a discrepancy in CONN's seed-to-voxel results explorer and I was hoping to receive some clarification.

I'm noticing that when I start with the effect of group (contrast vector: [1]) in the main GUI and then, in the results explorer, go from the one-sided positive (t) contrast to the two-sided (f) contrast, that the coordinates for the positive clusters stay the same. In contrast, if I compare the coordinates from the one-sided negative (t) contrast to the two-sided (f) contrast, that the coordinates for the negative clusters change.

If I type the F-contrast matrix into the main GUI (e.g., [1; -1] rather than [1]) or use the spm display button to define a new F-contrast, the coordinates are the same as both positive and negative one-sided contrasts. I'm wondering whether the positive one-sided coordinates should be updating when going from one- to two-sided or the negative one-sided coordinates are not updating accurately in the results explorer or I'm misinterpreting in some way. Any guidance you can provide would be greatly appreciated and definitely don't hesitate to have me clarify anything that is unclear.

Many thanks!
Teddy