Willpower: not a limited resource?

Jess_Riedel

Stanford Report has a university public press release about a recent paper [subscription required] in Psychological Science. The paper is available for free from a website of one of the authors.

The gist is that they find evidence against the (currently fashionable) hypothesis that willpower is an expendable resource. Here is the leader:

Veronika Job, Carol S. Dweck, and Gregory M. Walton
Stanford University

Abstract:

Much recent research suggests that willpower—the capacity to exert self-control—is a limited resource that is depleted after exertion. We propose that whether depletion takes place or not depends on a person’s belief about whether willpower is a limited resource. Study 1 found that individual differences in lay theories about willpower moderate ego-depletion effects: People who viewed the capacity for self-control as not limited did not show diminished self-control after a depleting experience. Study 2 replicated the effect, manipulating lay theories about willpower. Study 3 addressed questions about the mechanism underlying the effect. Study 4, a longitudinal field study, found that theories about willpower predict change in eating behavior, procrastination, and self-regulated goal striving in depleting circumstances. Taken together, the findings suggest that reduced self-control after a depleting task or during demanding periods may reflect people’s beliefs about the availability of willpower rather than true resource depletion.

(HT: Brashman, as posted on HackerNews.)

Stanford Report has a university public press release about a recent paper [subscription required] in Psychological Science. The paper is available for free from a website of one of the authors.

The gist is that they find evidence against the (currently fashionable) hypothesis that willpower is an expendable resource. Here is the leader:

Veronika Job, Carol S. Dweck, and Gregory M. Walton
Stanford University

Abstract:

Much recent research suggests that willpower—the capacity to exert self-control—is a limited resource that is depleted after exertion. We propose that whether depletion takes place or not depends on a person’s belief about whether willpower is a limited resource. Study 1 found that individual differences in lay theories about willpower moderate ego-depletion effects: People who viewed the capacity for self-control as not limited did not show diminished self-control after a depleting experience. Study 2 replicated the effect, manipulating lay theories about willpower. Study 3 addressed questions about the mechanism underlying the effect. Study 4, a longitudinal field study, found that theories about willpower predict change in eating behavior, procrastination, and self-regulated goal striving in depleting circumstances. Taken together, the findings suggest that reduced self-control after a depleting task or during demanding periods may reflect people’s beliefs about the availability of willpower rather than true resource depletion.

(HT: Brashman, as posted on HackerNews.)

This paper and its experiments are of higher quality than I'm used to in psychological research.

What's demonstrated: if you prime an excuse for doing poorly, you will do poorly. I think there's already some similar research (different types of excuses, though). They also show that self-reported exhaustion (not just "ego depleting" tasks) leads to a difference in performance that goes in exactly the direction that the subjects are primed to believe (either being reminded of an existing belief, or being tricked into holding it with biased questions).

It surprises me that, of the people who don't claim to expect to flag when fatigued, those who report being exhausted by the depletion task actually make less errors than those who don't. Unless this is just due to warming up their inhibition/vigilance (both the initial and final tests require it) while, it suggests that positive expectations can boost performance, not just that available excuses can harm it.

I like that they demonstrated that errors on IQ problems tracks errors on mundane rule-following, vigilance type tasks, but it's amusing to me that people who believe they'll do worse when fatigued, actually test as smarter (less IQ test errors) when fresh, whereas those primed to believe they won't effectively fatigue improve slightly, but are still worse than the "limited resource" believers' initial performance. This effect is still there, but probably not significant, for the simple but tiresome "willpower" testing (Stroop) task. I assume the "limited"-believers are more engaged by an IQ-proving question, either for signaling or entertainment, compared to the boring Stroop task. Disclaimer: these differences, from figures in pg 5 of the paper. aren't strongly significant (N ~= 50), so maybe I shouldn't conclude anything (the authors don't pin anything on them).

if you prime an excuse for doing poorly, you will do poorly.

This is the most useful sentence I've read today.

I care strongly about winning. When I look back on a day and ask myself what I could have done better, I want answering to be a struggle, and not for lack of imagination. I'm not content to coast through life, so I optimize relentlessly. This sentiment might be familiar to LW readers. I don't know. Maybe.

When a day goes particularly well or poorly, I want to know why, and over the last few years I've picked a few patterns out of my diary. I know ... (read more)

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Willpower: not a limited resource?

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Willpower: not a limited resource?

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