Hi Dr. McLaren & all,
I have a similar yet much simpler question regarding reversibility in interpreting these effects. I understand that reversibility of seed->target direction in the same psychological context is not legitimate. But is positive PPI X->Y within taskA-taskB the same as the negative PPI X->Y within B-A? That is, if I wanted to include the negative PPI files of B-A in a higher order regression model but only have access to positive PPI con files of B-A, can't I just use imcalc [*(-1)] to invert them? Or do I need to re-model the entire PPI within the context of A-B so that I have what is considered to be the negPPI of B-A.
Thank you!
Thomas
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