The experience is specific enough to be recognisable: a persistent sense that you are less competent than others believe, that your successes are attributable to luck or timing, and that at some point this will be noticed.
It was first described in the late 1970s in a study of high-achieving women, and it has since been documented across genders, professions and countries. The literature is large and the phenomenon is not in doubt.
What is in doubt is the framing. Almost all popular treatment describes it as a syndrome located inside a person, to be corrected through self-work. That framing survives mostly because it is easier to act on than the alternative.
What predicts it
If impostor feelings were primarily a personality trait, they would be distributed fairly evenly across settings for a given individual. They are not.
The strongest situational predictors identified in the research are being numerically underrepresented in a group, being in a setting where the criteria for success are unclear, being early in a transition, and receiving feedback that is sparse or ambiguous.
Each of those is a property of an environment. And each of them, examined plainly, is a situation in which a rational person would in fact be uncertain about her standing.
Consider the underrepresentation case specifically. If you are the only person like you in a room, several things are simultaneously true: you have no reference group against which to calibrate, your errors are more memorable to observers because they are not diluted, and you cannot easily distinguish evaluation of your work from evaluation of your category. Feeling that your position is less secure than others' is, in that situation, an accurate reading rather than a distortion.
The diagnostic confusion
The impostor framing collapses two quite different states.
The first is a genuine miscalibration: a person with strong evidence of competence, in a stable environment with clear feedback, who nonetheless discounts all of it. That is a distortion, and individual work on it is appropriate and effective.
The second is uncertainty in an environment that supplies no information. That is not a distortion. Calling it one, and offering the person a workbook, misdiagnoses an information problem as a psychological one.
The reason the second case gets labelled as the first is that the second has no cheap remedy. Restructuring feedback, clarifying promotion criteria and changing the composition of a room are expensive. Telling someone to notice her negative self-talk is free.
What the gender pattern actually shows
Early work found impostor feelings more prevalent among women. Later work with better sampling has found the difference smaller than originally reported, and in some populations absent — men report the experience at substantial rates when asked in ways that do not require identifying with a stereotypically feminine construct.
What remains different is not the raw prevalence so much as the situations. Women are more likely to be in the environments that produce it: numerically underrepresented in senior and technical settings, more often the first or only in a role, more often subject to evaluation criteria that were designed around a different default.
That reading is consistent with the situational predictors and does not require any claim about differing psychology. It also generates different advice.
Better questions than "how do I stop feeling this"
If the feeling is partly informational, then the useful moves are informational.
What specifically would count as good work here, and who decides? An answer to this converts an ambient sense of insecurity into a checkable claim. The absence of an answer is itself data about the organisation.
What feedback have I actually received, as opposed to inferred? People experiencing impostor feelings are often working from a very thin evidence base that they have supplemented with worst-case assumption.
Is anyone else here uncertain? The near-universal experience of people who ask this is discovering that the confident-looking colleague is also improvising. This is the single most commonly reported relief in the qualitative literature.
Is this room giving me information, and if not, can I get it elsewhere? A mentor outside the immediate hierarchy is valuable largely as a second calibration source.
Where the individual framing is right
It would be an overcorrection to claim the phenomenon is entirely environmental. Rumination, perfectionism and a tendency to discount positive evidence are real cognitive patterns, they respond to established therapeutic approaches, and for some people that is exactly the right intervention.
The argument is not that internal work is useless. It is that assigning the whole of the phenomenon to the individual is both empirically wrong and conveniently cheap for institutions, and that a young woman who feels uncertain in a room where she is the only one of her kind is not malfunctioning. She is reading the room correctly.
The room, in that case, is the thing that needs the work.