Is There a Link Between Increased Brain Activity and Increased Behavior?

The waters are a little bit muddy here in terms of whether those increases in brain activation are actually linked to increased behavioral outcomes as well. So it may just be that these increases in activation may just be reflecting cognitive effort, increased concentration to actually perform the task without actually being better at the task. It sounds like it's a really complicated field to untangle the emotional response we might have when we eat something we like versus the stuff that's actually in the food.