What Is Imposter Syndrome?

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Feeling like a fraud is a predictable threat response, and it's most common at the top.

The instinct to hide uncertainty and look composed in stressful situations actually locks the anxiety in.

Suppressing feelings burns mental bandwidth and cuts off feedback that could update the belief.

Marcus, a COO I worked with, had just helped carry his company through a major acquisition. Millions of dollars secured, a decade of effort proven out, every external marker of success... yet he felt depleted, unable to understand why.

What he couldn't see was that he walked around his life as if every moment was a high-stakes meeting. He carried a substantial load of stress and spent enormous energy making sure no one else saw it. Composure was the only thing anyone ever saw from Marcus. The problem was that the cost of holding up the facade was invisible, even to him. So he put no effort into relieving it.

The pattern traced back to a childhood household where you didn't couldn't still, and where visible strain was understood as a sort of failure, never to be shown.

Your version might look different, but I bet you know the feeling. The moment before you present to the board. When a project proposal gets pushback. When someone praises your work, and your first instinct is, They're just being polite. A not-so-subtle disagreement with an important point you make in a meeting. The promotion six months ago that still feels like a clerical error.

You know the feeling. And you know the move you make right after it—you put the composed mask on. Quickly.

The feeling is called impostor phenomenon, and a systematic review of more than 11,000 people found 62 percent experience it at significant levels (Bravata et al., 2019); in executive samples, that climbs to around 71 percent. The people we assume have "figured it out" are the ones feeling it most.

And while the prevalence of imposter syndrome may feel unexpected, the real puzzle is why it is so difficult to beat. Even very smart leaders, who fully understand the pattern, can still stay stuck in it for decades. The answer isn't the feeling. It's........

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