You get the grade. You land the opportunity, receive the compliment, pass the exam you were certain you had failed. And instead of feeling relieved or proud, a quieter thought settles in almost immediately: this must have been a mistake. At some point, the people around you will figure out that you are not as capable as they seem to think. You got lucky this time, or you worked yourself into the ground in a way you probably cannot sustain. Whatever the explanation you reach for, the conclusion feels the same. You do not really deserve this.
That experience has a name. Psychologists call it the impostor phenomenon, and it is considerably more widespread than most people who experience it tend to believe.
The Origins of Impostor Syndrome
The concept was first described by clinical psychologists Pauline Clance and Suzanne Imes in 1978. They were working with high-achieving women who, by any external measure, were doing extremely well. Good academic records, professional recognition, genuine accomplishments.
And yet these women remained privately convinced that they were frauds, that their success did not actually reflect their ability, and that exposure was always around the corner (Clance & Imes, 1978). The word “impostor” was chosen carefully. These were not people who doubted whether their achievements had happened. They doubted whether those achievements said anything true about them.
How Widespread is it?
Research that followed over the next several decades expanded the picture significantly. Impostor feelings turned out not to be confined to women, or to any particular field, background, or level of seniority.
A widely cited review by Jitlada Sakulku and James Alexander (2011) estimated that around 70% of people encounter impostor feelings at some point in their lives. Students, surgeons, academics, artists, senior executives.
The range is broad enough that it starts to say something about the impostor syndrome itself rather than about specific groups.
The Cognitive Pattern Behind it
What links these experiences is a recognisable pattern of thought. When things go well, people high in impostor feelings tend to reach for external explanations. Luck. Good timing. Low expectations from others. An extraordinary effort that they are convinced cannot be repeated.
When things go poorly, the logic flips entirely. Failure gets attributed inward, treated as evidence of exactly the incompetence they always suspected was there.
This asymmetry, crediting the outside world for success and themselves for failure, is one of the most psychologically distinctive features of the phenomenon.
Measuring the Impostor Experience
Clance later developed a self-report questionnaire, the Clance Impostor Phenomenon Scale, which gave researchers a standardised way to measure these feelings across different populations (Clance, 1985).
It has since been used in hundreds of studies and remains one of the most widely applied instruments in this area.
Why Academic Environments Amplify it
Academic environments turn out to be particularly fertile ground for impostor syndrome. Universities are places of constant evaluation. Comparison with peers is hard to avoid.
The further you progress in any discipline, the more visible the gap becomes between what you currently know and what there is to know, and that visibility can feel threatening in ways that are not always easy to name.
Students entering higher education for the first time, especially those from backgrounds where university attendance is not a given, often report this acutely. The sense of not quite belonging. The suspicion that admission was a clerical error.
Gender and Social Expectations
Gender adds another layer to the picture, though not in a straightforward way. Early research focused heavily on women and suggested they were disproportionately affected. Later studies complicated this considerably.
Some found higher impostor scores among women, others found no meaningful difference in overall prevalence, and others still found that the more interesting variation was not in how often men and women experience these feelings but in how they respond to them (Cowman & Ferrari, 2002; Vergauwe et al., 2015).
Men appear less likely to disclose impostor feelings or discuss them openly. Whether this reflects genuinely lower prevalence or a learned reluctance to admit self-doubt is a genuinely open question.
Psychological Impact
The psychological consequences of persistent impostor feelings are well documented. Higher scores on impostor measures have been linked to greater anxiety, lower self-esteem, and reduced life satisfaction (Leary et al., 2000).
Several researchers have drawn connections to perfectionism, arguing that the relentlessly high internal standards many high achievers set for themselves both feed and are fed by impostor thinking (Vergauwe et al., 2015).
None of this makes impostor syndrome a clinical diagnosis. It does not appear in any diagnostic manual as a disorder in its own right. But sustained impostor feelings can erode wellbeing meaningfully over time, particularly when they go unrecognised.
Conclusion
Recognising the pattern is, in many ways, the beginning of dealing with it. The achievements are real. The evidence is there.
What the research points to, consistently, is that the internal voice insisting otherwise is not an accurate reporter. It is a psychological pattern shaped by temperament, context, gender socialisation, and culture.
It can be examined. It can be challenged.
And for anyone who has quietly suspected that they are the only one in the room who does not quite belong, the data has something reassuring to say: you are in very large company.
References
- Clance, P. R., & Imes, S. A. (1978). The impostor phenomenon in high achieving women: Dynamics and therapeutic intervention. Psychotherapy: Theory, Research & Practice, 15(3), 241–247.
- Clance, P. R. (1985). The impostor phenomenon: Overcoming the fear that haunts your success. Peachtree Publishers.
- Cowman, S. E., & Ferrari, J. R. (2002). “Am I for real?” Predicting impostor tendencies from self-handicapping and affective components. Social Behavior and Personality, 30(2), 119–125.
- Leary, M. R., Patton, K. M., Orlando, A. E., & Funk, W. W. (2000). The impostor phenomenon: Self-perceptions, reflected appraisals, and interpersonal strategies. Journal of Personality, 68(4), 725–756.
- Sakulku, J., & Alexander, J. (2011). The impostor phenomenon. International Journal of Behavioral Science, 6(1), 75–97.
- Vergauwe, J., Wille, B., Feys, M., De Fruyt, F., & Anseel, F. (2015). Fear of being exposed: The trait-relatedness of the impostor phenomenon and its relevance in the work context. Journal of Business and Psychology, 30(3), 565–581.