The Trouble With Telling Your Child They're Clever
It feels like the kindest thing you can say. But one sentence handed to four hundred children in a lab flipped how they handled the next hard thing they faced - and nearly four in ten of one group ended up lying about their scores.
We say it a hundred times a week without thinking. "Clever girl." "You're so smart." "Good job." It feels like the kindest thing a parent can do - hand a child a little confidence on their way out the door.
But a long run of research suggests one of those phrases might be quietly working against the very thing we want for them. The phrase is "you're so clever." The problem isn't that it's untrue. It's what it teaches a child to believe about themselves when things get hard.
Half were praised for being clever: "you must be smart at this." The other half were praised for trying: "you must have worked hard at this." One sentence. That was the whole experiment.
Then the children got a choice. They could do an easy task they'd be sure to ace, or a harder one they might learn something from. The clever-praised children mostly took the easy option. The effort-praised children mostly went for the challenge.
It got starker. When everyone was given a tough test they were bound to struggle with, the clever-praised children gave up sooner, enjoyed it less, and did worse afterwards. And when asked to report their scores to another child, nearly four in ten of the clever-praised group lied and inflated them.
Most children, sensibly, protect the label. They pick the easy task. They quit when it gets uncomfortable. In the lab, some even cheated rather than admit a low score, because the low score didn't feel like a bad result. It felt like a verdict on who they were.
"You worked really hard at that" points somewhere different. It points at something the child did, something they can do again. Effort is repeatable. A struggle stops being a threat and becomes part of the job. The children praised this way actually improved across the tasks, partly because they were willing to stay in the hard bit long enough to get better.
Researchers recorded ordinary families at home, going about their day, when their children were between one and three years old. They simply counted the kinds of praise parents used. Some leaned towards "good boy" and "you're so clever." Others leaned towards "you found it" and "you tried so hard."
Five years later, the same children were asked how they felt about challenges and setbacks. The toddlers who had heard more effort praise were the ones, at age seven or eight, who believed they could get better at things and who didn't crumble when something was difficult. A later follow-up even linked that early praise to how the children were doing in maths in Year 5. The words we use over a high chair, it turns out, don't just vanish into the air.
Schools ran with it. Posters went up. Assemblies were held. Children were told their brains were like muscles. And when researchers went back to check whether these packaged classroom programmes actually lifted results, the answer was deflating. A large review of the evidence in 2023 found that once you only counted the better-designed studies, the average effect on achievement more or less disappeared. The review also noted that studies run by people with a financial stake in the idea were far more likely to report it working.
The most careful trial, a big study of American teenagers, did find a small benefit, but mainly for lower-achieving students, and only as a gentle nudge rather than a transformation. So the honest summary is this. A slogan on a wall does very little. The day-to-day language a child actually hears from the adults who matter to them does more.
It's worth saying that children have excellent radar for hollow praise. Cheering "amazing" at everything, including the easy stuff, teaches them that your words don't mean much. In one survey, around a quarter of parents admitted they probably praise too much. Less, said with more attention, lands harder than a constant stream of "well done."
And none of this means you can never tell your child they're brilliant. Of course you can. They should know you think the world of them. The shift is smaller than it sounds. When it counts, when they've stuck at something or come back from a flop, praise the thing they did rather than the person they are. One tells them they're clever today. The other tells them they can get cleverer tomorrow, which is the more useful thing to believe when the work gets hard.
But a long run of research suggests one of those phrases might be quietly working against the very thing we want for them. The phrase is "you're so clever." The problem isn't that it's untrue. It's what it teaches a child to believe about themselves when things get hard.
A simple experiment with an uncomfortable result
In the late 1990s, two psychologists, Claudia Mueller and Carol Dweck, ran a set of studies with around 400 ten and eleven year olds. Every child did some puzzles. Every child was told they had done well. The only thing that changed was the last line.Half were praised for being clever: "you must be smart at this." The other half were praised for trying: "you must have worked hard at this." One sentence. That was the whole experiment.
Then the children got a choice. They could do an easy task they'd be sure to ace, or a harder one they might learn something from. The clever-praised children mostly took the easy option. The effort-praised children mostly went for the challenge.
It got starker. When everyone was given a tough test they were bound to struggle with, the clever-praised children gave up sooner, enjoyed it less, and did worse afterwards. And when asked to report their scores to another child, nearly four in ten of the clever-praised group lied and inflated them.
Why "clever" can backfire
The difference comes down to what the praise points at. "You're so clever" points at the child. It frames ability as a thing you are, fixed and finished. So the moment a task gets hard, the child faces a horrible choice. Keep going and risk proving they aren't clever after all, or back off and protect the label.Most children, sensibly, protect the label. They pick the easy task. They quit when it gets uncomfortable. In the lab, some even cheated rather than admit a low score, because the low score didn't feel like a bad result. It felt like a verdict on who they were.
"You worked really hard at that" points somewhere different. It points at something the child did, something they can do again. Effort is repeatable. A struggle stops being a threat and becomes part of the job. The children praised this way actually improved across the tasks, partly because they were willing to stay in the hard bit long enough to get better.
It starts younger than you'd think
You might assume this only matters once children are old enough to compare themselves to others. A study from 2013 suggests otherwise.Researchers recorded ordinary families at home, going about their day, when their children were between one and three years old. They simply counted the kinds of praise parents used. Some leaned towards "good boy" and "you're so clever." Others leaned towards "you found it" and "you tried so hard."
Five years later, the same children were asked how they felt about challenges and setbacks. The toddlers who had heard more effort praise were the ones, at age seven or eight, who believed they could get better at things and who didn't crumble when something was difficult. A later follow-up even linked that early praise to how the children were doing in maths in Year 5. The words we use over a high chair, it turns out, don't just vanish into the air.
But here is where it gets complicated
If the story stopped there, the advice would be easy: swap one phrase for another and you've sorted it. The trouble is that the wider idea behind all this, often called "growth mindset," got turned into something it was never meant to be.Schools ran with it. Posters went up. Assemblies were held. Children were told their brains were like muscles. And when researchers went back to check whether these packaged classroom programmes actually lifted results, the answer was deflating. A large review of the evidence in 2023 found that once you only counted the better-designed studies, the average effect on achievement more or less disappeared. The review also noted that studies run by people with a financial stake in the idea were far more likely to report it working.
The most careful trial, a big study of American teenagers, did find a small benefit, but mainly for lower-achieving students, and only as a gentle nudge rather than a transformation. So the honest summary is this. A slogan on a wall does very little. The day-to-day language a child actually hears from the adults who matter to them does more.
What seems to actually help
The useful bit isn't a magic phrase. It's paying attention to what you're praising and meaning it. Point at the specific thing the child did. "You kept going when that got tricky." "You tried a different way after the first one didn't work." That tells them something true and repeatable about how they got there.It's worth saying that children have excellent radar for hollow praise. Cheering "amazing" at everything, including the easy stuff, teaches them that your words don't mean much. In one survey, around a quarter of parents admitted they probably praise too much. Less, said with more attention, lands harder than a constant stream of "well done."
And none of this means you can never tell your child they're brilliant. Of course you can. They should know you think the world of them. The shift is smaller than it sounds. When it counts, when they've stuck at something or come back from a flop, praise the thing they did rather than the person they are. One tells them they're clever today. The other tells them they can get cleverer tomorrow, which is the more useful thing to believe when the work gets hard.
Sources & Further Reading