Carol Dweck
Carol Dweck is a psychologist at Stanford, known outside the field for her work on mindset, the study of what a person's beliefs about their own capacities do to their behaviour. She appears on this site in a narrower role: second author of Job, Dweck and Walton (2010), the paper proposing that ego depletion shows up only in people who already believe willpower is a limited resource. When the resource account of self-control collapsed under replication, the belief account was what got brought in to replace it. It failed its own preregistered replication in 2023. Popular retellings routinely credit the finding to Dweck, though Veronika Job is first author.
Who they are
Dweck is a psychologist at Stanford. Her wider reputation belongs to mindset research, the body of work arguing that what people believe about whether their abilities are fixed or improvable feeds back into how they perform. That programme is not what puts her on this site, and the site does not source it beyond the caution set out below.
What puts her here is one paper. In 2010, with Veronika Job as first author and Gregory Walton as third, she published "Ego Depletion, Is It All in Your Head? Implicit Theories About Willpower Affect Self-Regulation" in Psychological Science. The answer the title invites is more or less yes. Across four studies, signs of ego depletion appeared only in participants who already held the view that willpower is finite. A second study manipulated that belief and produced the same split. A fourth followed students through a demanding exam period and found that their theory of willpower predicted changes in eating, procrastination and goal pursuit.
The paper arrived before the replication failures that emptied out the resource model, and it was well placed to inherit the subject when they landed. It also has an obvious appeal that is worth naming as a warning rather than a recommendation. A physiological ceiling is something you are stuck with. A belief is something you can change over a weekend, which is what made the theory sellable at exactly the moment its predecessor stopped being.
Two things have happened to it since. Nathan Carruth, Jason Ramos and Akira Miyake published a preregistered replication in PLoS ONE in 2023, using the original tasks and materials obtained from the original authors, with 187 participants against the original 60. They found neither the depletion effect nor its moderation by willpower belief. Their accompanying review of thirteen qualifying studies found the supportive ones systematically smaller and systematically less likely to be preregistered, and reported that the original dataset was requested from Job's team and not supplied. Carruth and his colleagues are careful about scope: their critique is confined to the ego-depletion paradigm, and they say plainly that willpower mindset remains useful elsewhere in self-control research.
The second thing is a matter of who gets named. Nir Eyal gives the belief account a chapter in Indistractable, and credits it to Dweck rather than to Job. That is the usual pattern. The famous name gets fronted and the first author disappears, which is a small injustice on its own and a durable one once it has been repeated enough times for the citation to travel in the wrong shape.
One further caution belongs on this page rather than in a footnote. The growth-mindset literature has its own contested replication record, with intervention effect sizes considerably smaller than the popular presentation suggests. Being on the right side of the ego-depletion story does not confer general authority, and Dweck should not be read here as an unproblematic source simply because the theory she co-authored was the more interesting of two that failed.
Key papers
The site sources one paper of hers directly. The mindset programme is referenced only through the replication caution above, and no claim about it is made here that is not sourced.
Job, V., Dweck, C. S., & Walton, G. M. (2010), "Ego depletion, is it all in your head? Implicit theories about willpower affect self-regulation," Psychological Science, 21(11), 1686-1693. Four studies. Depletion appeared only in participants who believed willpower was a limited resource, whether that belief was measured or manipulated.
The paper that tested it: Carruth, N. P., Ramos, J. A., & Miyake, A. (2023), "Does willpower mindset really moderate the ego-depletion effect? A preregistered replication of Job, Dweck, and Walton (2010)," PLoS ONE, 18(6): e0287911. N = 187, preregistered, no main effect and no moderation.
Key ideas
Willpower belief as the mechanism: the claim that depletion is produced by thinking self-control is finite, not by anything actually running out.
Job is first author. The finding is routinely credited to Dweck, including in the trade book where most general readers meet it.
The belief account did not survive a preregistered test, and the review alongside that test found the supportive studies smaller and less often preregistered than the null ones.
The growth-mindset literature has a contested replication record of its own, with effect sizes well below the popular version. Treat the authority as bounded.
Concepts on this site
Find them elsewhere
Only the Stanford faculty page could be confirmed. A Google Scholar profile listing her work exists but is verified at hawaii.edu with no stated affiliation, so it was not recorded, and no social accounts could be confirmed as hers
Checked 2026-09-10. Handles and affiliations go out of date, so treat this block as a snapshot rather than a standing fact.
Sources
- Job, V., Dweck, C. S., & Walton, G. M. (2010), "Ego depletion, is it all in your head? Implicit theories about willpower affect self-regulation," Psychological Science, 21(11), 1686-1693.
- Carruth, N. P., Ramos, J. A., & Miyake, A. (2023), "Does willpower mindset really moderate the ego-depletion effect? A preregistered replication of Job, Dweck, and Walton (2010)," PLoS ONE, 18(6): e0287911.
- Eyal, N. (2019), Indistractable: How to Control Your Attention and Choose Your Life. Where the belief account reaches a general audience, credited to Dweck rather than to Job.