Difficulty disengaging from a focus of interest that drives reward is a cognitive feature contributing to anorexic habits.

“The other is a challenge in set shifting that once you identify something that's of particular interest and that's driving some sort of reward, for the anorexic that would be identifying the high-fat foods or identifying the one food on the table that one could eat without anyone, hopefully noticing that they're eating just the green beans and not touching any of the other food.”