If you have spent time around high performers — startup founders, senior engineers, people three promotions into a career everyone else envies — you have probably met the strangest version of self-doubt there is. The more they accomplish, the more convinced they become that they have somehow pulled off an elaborate con, and that the moment of exposure is always just around the corner.

The feeling has a name. In 1978, two clinical psychologists, Pauline Clance and Suzanne Imes, published a paper on what they called the imposter phenomenon — the thing everyone now knows as imposter syndrome. Working with women who had earned degrees, awards, and professional respect, they kept hearing the same thing: a private conviction that the accomplishments were a fluke, that everyone had been fooled, and that real competence belonged to other people. Later research found the experience is just as common in men, and that it clusters, tellingly, among the most capable people in the room.

Why the feeling targets the competent

There is a cruel logic to it. To worry that you are not good enough, you need a standard high enough to fall short of, and enough self-awareness to notice the gap. People who are genuinely coasting rarely lie awake worrying they are frauds. The feeling tends to require exactly the conscientiousness that produced the success in the first place. And in demanding fields — tech, medicine, finance, anywhere the bar keeps moving — there is always someone more fluent in the newest framework, the newest model, the newest market. The definition of “enough” resets faster than you can hit it.

The credentials pile up on the outside while the feeling on the inside refuses to update.

The flip side: the confident often aren't the competent

There is a companion finding that makes the picture stranger. In 1999, Justin Kruger and David Dunning ran a series of experiments — testing people on logic, grammar, and humor — and found that the people who performed worst were often the most confident, dramatically overestimating how well they had done. They lacked the very skill required to recognize their own mistakes. The same incompetence that produced the errors hid the errors from view.

Less famous, but more useful if you are the anxious high achiever, is the other half of their data. The top performers tended to underestimate how they stacked up against everyone else. Because the material came easily to them, they assumed it came easily to everyone, and quietly discounted their own edge. So the room often sorts itself in a way that feels backwards: the loudest confidence belongs to the people with the least to back it up, and the sharpest self-doubt belongs to the people doing the best work.

What to do with it

The standard advice here is some version of “just believe in yourself,” which I have never found very useful. Confidence summoned on command is thin and rarely survives a hard week. Here is the reframe I trust more: feeling like an imposter says almost nothing about your ability. It says you hold a high standard and can see the gap between where you are and where you want to be. That gap is where competent people spend their whole careers. You do not have to make the feeling go away. You just have to stop reading it as a verdict.

And on the worst days, remember who does not have this problem. The people sailing through without a flicker of doubt are not the ones you want to trade places with.