Few ideas from psychology have traveled as far as growth mindset. The phrase appears on classroom posters, in corporate training slides and in parenting books. The basic message is appealing: if you believe your abilities can grow with effort, you are more likely to learn, persist and succeed.

Then researchers tested it on hundreds of thousands of students. Some of the results were disappointing. Others pointed to a narrower effect that is real, and more useful than the poster.

Where the idea came from

The concept comes from the Stanford psychologist Carol Dweck and her colleagues, who spent decades studying how people think about ability. In the research literature, these beliefs are called implicit theories, and Dweck popularized them for general readers in her 2006 book Mindset.

The core distinction is simple:

  • A fixed mindset is the belief that a trait such as intelligence is essentially set. You have a certain amount, and that's that.
  • A growth mindset is the belief that the trait can be developed through effort, good strategies and help from others.

Dweck's argument was that these beliefs shape behavior. If you think intelligence is fixed, a hard problem is a threat, because struggling might reveal that you lack ability. If you think intelligence can grow, a hard problem is a chance to improve. Early studies suggested that students with a growth mindset were more willing to take on challenges and recover from setbacks.

The idea goes viral

As the idea spread, it was often simplified. Growth mindset turned into "praise effort, not talent," or simply "believe in yourself." Schools adopted mindset lessons. Companies built training around it. Some of the claims went well beyond what the research had shown, and Dweck herself has written publicly about the risk of a "false growth mindset," where people praise effort that is not actually producing learning.

Popularity brought scrutiny, and scrutiny brought better studies.

What the large meta-analyses found

In 2018, a team led by Victoria Sisk and Brooke Macnamara published two meta-analyses in the journal Psychological Science. A meta-analysis combines results from many studies to estimate an overall effect.

The first meta-analysis looked at the link between students' mindsets and their academic achievement. It pooled 273 studies with a total of 365,915 participants. The second looked at whether interventions designed to teach a growth mindset improved achievement. It pooled 43 studies with 57,155 participants.

The authors put it bluntly: "Overall effects were weak for both meta-analyses." In other words, students who held a growth mindset did only slightly better on average, and teaching a growth mindset produced, on average, only small changes in achievement.

But the same paper added an important qualification. Some results supported specific parts of the theory, "namely, that students with low socioeconomic status or who are academically at risk might benefit from mind-set interventions." The average effect was small, but it was not evenly spread.

The national experiment

A year later, in 2019, a large team including David Yeager, Carol Dweck and Angela Duckworth published the results of a national experiment in the journal Nature. They tested a short online growth mindset program, taking less than an hour, in a nationally representative sample of ninth grade students in the United States.

The study was designed to be unusually rigorous. According to the authors, confidence in the results came from "independent data collection and processing, pre-registration of analyses, and corroboration of results by a blinded Bayesian analysis." Pre-registration means the researchers stated in advance what they would analyze, which makes it harder to cherry pick favorable results.

The findings were quite specific. The intervention "improved grades among lower-achieving students" and "increased overall enrolment to advanced mathematics courses." The effects on grades were modest, but they appeared in exactly the group that the earlier meta-analysis had flagged.

The study also found that context mattered. The intervention changed grades "when peer norms aligned with the messages of the intervention." In schools where classmates did not value challenge and effort, a short lesson was less likely to stick.

Putting the two findings together

At first glance, the meta-analyses and the national experiment seem to disagree with each other. One says the effects are weak; the other reports real improvements. In fact, they tell a consistent story:

  1. Average effects are small. Teaching people that ability can grow is not a magic lever that raises everyone's results.
  2. Some people benefit more. Students who are struggling, or who face disadvantages, appear to gain the most.
  3. Environment matters. A belief has to be supported by the surroundings. A mindset lesson in a culture that punishes mistakes is unlikely to change much.

It's a useful pattern to keep in mind for any self improvement idea. A small average effect can hide meaningful effects for particular people in particular settings.

What this means outside the classroom

Most of this research is on students, so we should be careful not to stretch it too far. Still, a few lessons carry over reasonably well to adult learning, careers and personal growth.

Belief is not a substitute for method. The original theory never claimed that believing you can improve is enough. The growth mindset message is about effort combined with good strategies and help. If you are stuck, the question is not only "Do I believe I can get better?" but "What specifically am I doing to get better, and is it working?"

Watch out for effort for its own sake. Praising hours spent, without asking whether those hours produce learning, misses the point. Ask what changed after the effort.

Look at your surroundings. The national study found that peer norms shaped whether the message took hold. If you want to keep growing, spend time with people who treat mistakes as information rather than as verdicts. A good mentor can make a large difference here, which is one reason we write so often about finding one.

Be realistic about the size of the effect. A mindset shift may help you persist through a hard stretch. It will not, on its own, transform your results. That isn't a reason to dismiss it. It's a reason to pair it with practice, feedback and patience.

A simple practice

If you want to apply the idea without falling for the hype, try a short weekly reflection built around three questions:

  1. What was hard this week? Name one specific challenge, not a general mood.
  2. What did I try? List the strategies you used, not just the time you spent.
  3. What will I change? Pick one adjustment in method, or one person to ask for help.

This keeps the focus on learning rather than on how you feel about your ability. Over time, a record of these answers shows growth more convincingly than any poster.

The honest takeaway

Growth mindset is neither a fraud nor a miracle. The best current evidence suggests it is a real but modest effect, strongest for people who are struggling and in settings that support it. That is a more useful conclusion than the slogan, because it tells you where to focus: on the methods you use, the feedback you get and the people around you.

Seneca would have recognized the lesson. Believing you can improve is a starting point. The actual improving still has to be done.

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