Impostor Syndrome

McElwee and Yurak found that the scales in use measure general negative affect more closely than they measure that discrepancy. Six instruments exist and the thing they were built for may not be what they are recording.

Which instruments exist

Harvey produced the first, fourteen items, in 1981. The Clance Impostor Phenomenon Scale followed in 1985 with twenty items, adding the anxiety of being judged and a sense of inferiority toward peers, and it is the most frequently used, though research has not conclusively shown it superior to the alternatives. Kolligian and Sternberg's Perceived Fraudulence Scale and the seven-item Leary Impostor Scale are the others, the latter assessing only one facet, the perception of being a fraud.

The Impostor Phenomenon Assessment arrived in 2023 on three factors, and its example items are the most concrete description of the phenomenon available. Its three factors are the most concrete description available:

• doubts about achievement, meaning fear of failure or success and overpreparation, often felt as a need to work harder than others for the same result
• perceived discrepancy, meaning discounting achievement and attributing success to luck, to pulled strings or to connections
• self-handicapping behaviours, meaning avoidance and perfectionism, such as leaving tasks to the last minute

Why Tewfik's correction matters

Tewfik separated the sociocognitive core from the affective and behavioural features, the fear of exposure among them, that had been folded into definitions and measures.

Her argument has a consequence worth following. Building negative affect into the definition may be producing the overwhelmingly negative outcomes reported in the literature, and obscuring other possible outcomes. If a scale asks about distress, the people it identifies will be distressed, and the question of whether the underlying belief has any neutral or useful effects cannot be asked.

Tewfik went back to the belief itself, gave it a name for the workplace, workplace impostor thoughts, defined it as thinking colleagues rate one's competence too highly, and built five items to measure that and nothing else. It is related to the Clance scale and distinct from it. A review across disciplines in 2025 found the construct still unclear and argued for putting one thing back at the centre of it: the belief that other people rate a person higher than the person rates themselves.

Why it is not a disorder

Impostor syndrome is not a recognised psychiatric disorder and appears in neither DSM-5 nor ICD-11. The consequence is stated plainly in the material: clinicians lack information on prevalence, on comorbidities, and on best practices for assessing and treating it.

It is described as an experience a person has rather than a mental disorder, and as a distorted system of belief about oneself rather than a pathological condition, which can nonetheless have a powerful negative effect on how people value themselves. Meanwhile it is widely discussed outside the academic literature, particularly around workplace achievement, which is the reverse of the usual situation in this catalogue: a term with real instruments and real research that is better known for the version circulating without them.

What it travels with

Depression and anxiety are commoner among people who have it, and so are low self-esteem, physical symptoms with no clear cause, and difficulty functioning socially. The traits it goes with are neuroticism, low self-esteem and perfectionism. The traits it runs against are extraversion, agreeableness and conscientiousness.

Because the associations come from correlational studies, cause and effect cannot be separated, and the material says so rather than implying a direction.

A University of Idaho study in 2025 sharpened the perfectionism relationship: impostorism correlated strongly with rigid and self-critical perfectionism and showed a null correlation with narcissistic perfectionism. The two constructs are closely related and the subtypes matter.

Higher scores are associated with lower job satisfaction, lower job performance and higher rates of burnout.

What impostorization moves

The single most useful term in this entry moves the location of the problem. Impostorization moves the problem off the person and onto the place. Some institutions have policies, habits and cultures that leave people doubting their own intelligence, their competence and whether they belong, and in some cases that is what those arrangements were for.

That reframing does something no scale does. If the belief that others overestimate a person is being produced by an environment designed to unsettle them, then it is an accurate perception of a hostile setting rather than a distortion, and measuring the individual's distress will find the wrong subject.