You just got promoted, wrapped up a major project, received praise from your manager — and yet there’s a voice inside saying: “I just got lucky. Sooner or later they’ll figure out I’m not really good enough.” If this sounds familiar, you’re not alone. It has a name: impostor syndrome.

The study that gave the phenomenon a name

The term was coined in 1978, when psychologists Pauline Rose Clance and Suzanne Imes published “The Imposter Phenomenon in High Achieving Women: Dynamics and Therapeutic Intervention” (Psychotherapy: Theory, Research and Practice). The two had met at Oberlin College and noticed a recurring pattern: women with outstanding academic and professional achievements who, despite degrees, awards, and solid careers, described themselves as “fake intelligent” and lived in constant fear of being “found out.” Clance and Imes observed that the phenomenon was especially intense in this group, and less frequent — or at least less pronounced — in men, though not entirely absent.

Since then, research has grown considerably, and today we know impostor syndrome is far from a niche experience. A systematic review of the scientific literature found that prevalence rates range between 9% and 82%, depending on the screening tool used, and that a substantial share of professionals — by some estimates up to 70% — experience at least one significant episode of it during their career. It shows up among doctors, engineers, lawyers, managers, university professors, entrepreneurs: very different professional categories, united by high standards and competitive environments. And, contrary to early assumptions, it affects men just as much as women.

What actually happens

A mind caught in impostor syndrome systematically attributes success to external factors — luck, timing, someone else’s help, even a misjudgment by whoever’s evaluating — while internalizing every mistake or setback as definitive proof of inadequacy. It’s a self-reinforcing loop: the more achievements pile up, the more the fear grows that the next task will reveal “the truth.”

Two practical strategies to break the pattern

The good news: because it’s a thinking pattern, it can be recognized and retrained.

1. The evidence log

Create a document — even just a note on your phone — where you regularly record objective facts that demonstrate your competence: a project completed, positive feedback received, a problem you solved, a deadline met under pressure. This isn’t about convincing yourself with motivational phrases; it’s about gathering concrete, verifiable evidence — the way you would build a case. When the inner voice says “you just got lucky,” the evidence log lets you answer with facts, not feelings. Reading it back before an interview, a presentation, or a performance review can make a real difference in how you show up.

2. Talk about it with colleagues you trust

One of the main engines behind impostor syndrome is silence: you assume you’re the only one feeling this way, which makes it feel more shameful and lets it take deeper root. Opening up to someone you trust — a colleague, a mentor, a manager you have a good relationship with — often reveals that the same feeling is shared by many, including people you professionally admire. Naming it out loud strips away the belief that you’re an isolated case and lets you look at the situation more clearly.

Feeling like a fraud despite your results doesn’t mean you’re not competent — it just means your mind, under certain conditions, distorts the evidence against you. Recognizing the pattern is already the first step toward no longer believing it.