Last updated: 15 April 2026
Imposter syndrome is the persistent private belief that you are not as capable as other people think, and that sooner or later you will be found out. It was first named in 1978 by psychologists Pauline Rose Clance and Suzanne Imes. A 2020 KPMG study found 75 percent of female executives have personally experienced it. Jen Fairbairns, ICF-accredited identity coach with 3,500+ coaching hours, treats it as an identity mismatch, not a thinking error.
Imposter syndrome is the persistent, private belief that you are not as capable as other people think, and that sooner or later you will be found out. It was first named in 1978 by clinical psychologists Pauline Rose Clance and Suzanne Imes, after they noticed that the high-achieving women they were working with could not internalise their own success. It is not a thinking error. It is an identity mismatch, and it tends to get worse the higher you climb.
That last part is the part most articles miss.
Where did the term come from?
Clance and Imes published "The Imposter Phenomenon in High Achieving Women: Dynamics and Therapeutic Intervention" in Psychotherapy: Theory, Research and Practice in 1978. Their sample was 150 high-achieving women, 95 undergraduates and 10 Ph.D. faculty among them, aged 20 to 45. Every one of them had external evidence of competence. Advanced degrees. Professional recognition. High test scores. Scholastic honours.
And every one of them secretly believed it was a mistake.
Students in the sample described fantasies that they had been admitted to graduate school through an admissions error. Graduate students attributed high exam results to luck, timing, or charm. The women in the faculty group privately waited for the day someone would realise they weren't really qualified.
Clance and Imes were the first to put a name on it. They didn't pathologise it. They described it as an identity pattern that developed in childhood, often in families that either compared women unfavourably to "bright" male siblings, or praised them indiscriminately and set a standard of "perfection with ease." Both dynamics left the same fingerprint. The achievements didn't feel earned. They felt borrowed.
Nearly fifty years later, the pattern is still showing up in the research. Only now, it shows up in much bigger samples.
How common is imposter syndrome, really?
The most thorough answer came from a systematic review by Dena M. Bravata and colleagues at Stanford, published in the Journal of General Internal Medicine in 2020. They analysed 62 studies involving 14,161 participants. Prevalence ranged from 9 percent to 82 percent depending on the scale and cut-off used, and the rate was particularly high among ethnic minority groups.
That is a huge range, and it matters. It tells you this is not a niche experience. It is a near-universal pattern among people who have achieved something.
The numbers get sharper when you look at specific populations.
- KPMG's 2020 Women's Leadership Summit Report surveyed 750 senior women at VP level or above in Fortune 1000 companies. Seventy-five percent had personally experienced imposter syndrome. Fifty-seven percent said they felt it most when they were promoted or moved into a new role. Forty-seven percent felt it because they never expected to reach the level of success they had.
- Research shared by the British Psychological Society found that 97.5 percent of women in STEM graduate programmes reported imposter feelings at least at a moderate level. That's essentially everyone.
- A study in Mayo Clinic Proceedings (November 2022) examined 3,116 US physicians. Sixty percent experienced at least moderate imposter phenomenon symptoms. Forty-one percent of women physicians and 24 percent of men scored as "impostors" on standardised measures.
- Hays's 2025 UK professional survey of 8,247 professionals found that 64 percent of technology workers experienced imposter syndrome. In tech specifically, 68 percent of women and 61 percent of men reported it. Over one third said it had become more frequent as their career progressed.
That last data point is the one I want to sit on for a minute. More frequent as the career progressed. Not less.
Why does imposter syndrome hit high achievers hardest?
Because the pattern isn't about competence. It's about identity.
Here's what I mean.
A senior leader gets promoted. Externally, everything makes sense. Her track record is excellent. Her team respects her. The evidence is there. Internally, the identity she has been running on, the identity that says "I am useful because I work harder than anyone else," is suddenly out of alignment with her new role. The new role requires her to delegate, trust, and hold space rather than produce. Her old identity has no framework for that. So the internal narrator says, "You must be a fraud. You don't belong at this level." And she doubles down on the old strategy that used to work, which is to out-effort the discomfort.
That's the part the cognitive-behavioural framing misses. It treats imposter syndrome as a distortion to correct with better thinking. Repeat affirmations. Challenge your negative self-talk. Make a list of your accomplishments.
The women I work with have tried all of that. They have colour-coded it. They have bullet-pointed it. They still feel like frauds.
The issue is not that their thinking is wrong. The issue is that the identity they built to get here cannot absorb what they have become. Which is a different problem entirely, and it needs a different kind of work.
What does imposter syndrome actually cost?
It costs careers and it costs health, and there is hard data on both.
On careers:
- A workplace survey synthesis found that 45 percent of workers actively avoid promotions, new roles, or challenging opportunities because of imposter syndrome. Thirty-one percent fail to complete important projects because of it. Imposter syndrome costs UK employees an estimated 10 full workdays per year through excessive over-preparation, perfectionism, and anxiety-driven revision.
- The KPMG study found that 56 percent of female executives feared the people around them would not believe they were as capable as they were expected to be. Fear of that gap shapes decisions for years.
On health:
- The Mayo Clinic Proceedings 2022 study on physicians found a dose-response relationship between imposter phenomenon severity and burnout. Compared to those with low imposter scores, the odds of burnout were 1.28 for moderate imposter symptoms, 1.79 for frequent, and 2.13 for intense. The study also found that physicians with intense imposter phenomenon had 162 percent higher odds of suicidal ideation.
- Research on mental health professionals (158 workers) found a significant positive correlation between imposter phenomenon and burnout, r = .508, p less than .001, with the relationship holding even after controlling for years of experience and age.
- A study of nursing students found imposter syndrome correlated with depression (r = .609), anxiety (r = .599), and stress (r = .594), all statistically significant.
So this is not a harmless personality quirk. It is a significant health and career factor that accumulates over time, and it hits women and minoritised groups harder than anyone else.
What about ethnicity and racialised imposter experience?
Bravata's 2020 review flagged this as one of the most important and under-studied dimensions of the phenomenon. More recent research has named it directly. It's called racialised impostor phenomenon.
Cokley and colleagues (2017) found direct and indirect links between experiences of discrimination, increased imposter feelings, and worsened mental health in racially diverse samples. A longitudinal study by Bernard and associates (2017) found that racial discrimination predicted later increases in imposter tendencies among Black college students.
For women of colour at executive level, the pattern stacks. They are working through the same internal identity mismatch as any high-achiever, plus the added burden of stereotypes that question whether they belong in the room at all. Which is why individual therapy can only do so much when the environment keeps supplying the evidence the pattern is looking for.
This is not a reason to do less internal work. It is a reason to do the internal work with clear eyes about what's systemic and what's yours.
Is imposter syndrome the same as low confidence?
No. And this confusion causes a lot of bad advice.
Low confidence is a general feeling that you are not capable. Imposter syndrome is a specific, persistent gap between external evidence of competence and internal belief in it. You can be highly confident in most areas of your life and still have imposter syndrome in the one area where you are actually succeeding.
Most high-achieving women I work with are not low in confidence in any meaningful sense. They run teams. They make decisions under pressure. They have, by any objective measure, the receipts. The problem is that the receipts stop counting the moment they arrive. The internal scoreboard resets to zero every Monday morning.
That's an identity pattern, not a confidence deficit. And it doesn't respond to confidence advice.
The High-Performing Avoider: where imposter syndrome lives in Jen's framework
In the 4 Behaviour Archetypes framework I use with clients, imposter syndrome most often lives inside the High-Performing Avoider.
The High-Performing Avoider regulates discomfort through competence, productivity, and forward momentum. When an emotional signal arrives (self-doubt, exposure anxiety, dread of being seen), she converts it into action. More preparation. Another revision. One more deliverable. The action burns off the feeling, at least temporarily. And the feeling comes back the next day.
The strategy underneath is, if I can out-work the discomfort, I don't have to feel it. If I can out-perform the doubt, I don't have to know what the doubt is trying to tell me.
The hidden cost is this. Performance becomes the primary way the nervous system regulates. Which means the nervous system gets locked into needing performance to feel safe. Which means rest becomes threatening, because it is the condition under which the imposter voice gets loudest.
The real work for a High-Performing Avoider is increasing the capacity to stay present when the discomfort rises, without immediately converting it into output. That is a much harder piece of work than it sounds. And it is almost never done alone.
You can read the full framework at jenfairbairns.com/4-behaviour-archetypes.
Imposter syndrome vs identity mismatch: a comparison
| Frame | What it assumes | What it treats | Why it often doesn't stick |
|---|---|---|---|
| Imposter syndrome as a thinking distortion (CBT framing) | Your thoughts are inaccurate | Cognitive challenge, reframing, evidence lists | Doesn't address the identity the thoughts are protecting |
| Imposter syndrome as low confidence | You lack self-belief | Confidence exercises, affirmations | Most high-achievers aren't low in confidence, they're high in identity gap |
| Imposter syndrome as identity mismatch | The identity you built to get here cannot absorb what you've become | Identity work, pattern recognition, slowing down the conversion of discomfort into action | Takes longer, lasts longer |
The first two framings are not wrong. They are just incomplete. They work on the surface of the pattern, not on the root.
What actually helps?
I want to be honest about what I see help, and what I see not help.
What I see help:
- Naming the pattern as an identity pattern, not a personality failure. This alone changes the relationship with it.
- Slowing down the automatic conversion of discomfort into over-preparation. That is where the nervous system work lives.
- Working with someone trained to hold the gap between external evidence and internal belief, without trying to argue you out of it.
- Building tolerance for being seen without having to perform. This is often the hardest piece.
What I see not help as a standalone fix:
- Gratitude lists of accomplishments. They are read and dismissed within the hour.
- Affirmations delivered without a felt sense of safety. The nervous system does not believe them.
- Being told you're "definitely qualified" by someone who hasn't earned the right to be believed.
- Advice to "fake it till you make it." That is exactly the strategy that created the exhaustion.
Coaching can help here, and the research supports it. The International Coaching Federation's 2024 Snapshot Survey on well-being found that 85 percent of coach practitioners now have clients asking for help with their mental well-being, and 78 percent of those clients cite business or career issues as the primary driver. The work is increasingly about the interior experience of the high performer, not just the tactics of the high performance.
Frequently asked questions
What are the signs of imposter syndrome? The most common signs are persistent self-doubt despite objective evidence of success, attributing achievements to luck or timing rather than ability, fear of being "found out", difficulty internalising praise, and a tendency to over-prepare or over-work to avoid exposure. The Clance Impostor Phenomenon Scale is the most commonly used clinical measure.
Is imposter syndrome a mental health condition? No. It is not classified as a mental disorder in the DSM-5 or ICD-11. It is a psychological pattern that is strongly associated with anxiety, depression, and burnout but is not itself a diagnosable condition.
Do high achievers really get imposter syndrome more? The evidence suggests they do, or at least they notice it more. KPMG's 2020 study found 75 percent of senior women executives experienced it. The Hays 2025 UK survey found 64 percent of tech professionals had it, and over a third said it became more frequent as their career progressed. Advancement appears to intensify, not reduce, the phenomenon.
Can a coach help with imposter syndrome? Yes, if the work is identity-based rather than just cognitive. Research from the International Coaching Federation's 2024 Snapshot Survey shows 85 percent of coaches now have clients requesting help with mental well-being, with the most effective approaches being individualised work on self-reflection and identity rather than standardised techniques.
What's the difference between imposter syndrome and low self-esteem? Low self-esteem is a generalised low opinion of yourself. Imposter syndrome is specific to domains where you are actually succeeding. You can have high self-esteem in most areas and still feel like an imposter at work. The gap is not about worth. It is about alignment between identity and role.
What happens next
If you've read this and recognised yourself, you have two useful next steps.
You can take the Behaviour Identity Archetype quiz at jenfairbairns.scoreapp.com. It tells you which of the 4 archetypes is running your pattern right now. The High-Performing Avoider is one of them. The quiz takes about four minutes and gives you a starting point.
Or, if you want to look at this with someone who has spent over 3,500 hours with people in exactly your position, you can book a Deep Dive. It's a 75-minute private coaching session, £375, and the fee is credited in full toward a coaching package if you move forward within seven days. You can book directly at buy.stripe.com/7sY00ldb66Ime5i8tO4AU0j.
The point is not to stop feeling like an imposter. The point is to stop believing the feeling is the truth about you. That's a different kind of work. And it lasts.
With you in the work, Jen
Jen Fairbairns is an Identity-Based Behaviour Change Coach with over 3,500 coaching hours. She holds a triple-accredited diploma from Sandown Business School, is ICF-accredited, and is a Certified Trauma-Informed Coach. She works with high-achieving professionals whose lives look fine but feel off.