[godawful]

I agree.

Another quotation from the article:

"They also found that leading up to final exam week, students who bought into the limited resource theory ate junk food 24 percent more often than those who believed they had more control in resisting temptation. The limited resource believers also procrastinated 35 percent more than the other group."

Perhaps people with poor self-control, who would eat junk food and procrastinate anyway, are more prone to believe that willpower is biologically limited. This saves them from having to take responsibility for their negative behaviour.

If that were the case, the causality would run in the opposite direction.