Many people can succeed and still feel like frauds. The challenge is finding out how common those feelings are, and whether social circumstances help shape them, without making people answer a long questionnaire. Impostor feelings are receiving increasing attention, especially because they may affect members of minority groups.

Yet there is little evidence about how often they occur or which social conditions are linked to them. The IPSS-3 was introduced as a time-efficient, universally applicable way to measure impostor feelings, with the aim of studying social context rather than treating those feelings as if they existed in a vacuum.

The findings present the IPSS-3 as suitable for large-scale and longitudinal research, including research that begins in adolescence, so researchers can examine age, life transitions, and differences among social groups. Key questions about the long-term evolution of impostor feelings and their social correlates remain open.

In other words, the field still does not know enough about how these feelings change over time or who experiences them more intensely. That gap matters because broad claims about the far-reaching psychological effects of impostor feelings have been based on a limited body of large-scale evidence.

The IPSS-3 was developed to address the lack of a universally applicable measure of impostor feelings. Think of it like replacing a long health questionnaire with a short check-in: the goal is to keep the signal while making repeated checks practical.

It was based on an established questionnaire and on a recently developed shorter version, chosen because it was already brief and designed to represent one underlying pattern of impostor feelings. The IPSS-3 showed high reliability, with alpha and omega both zero point eighty, only marginally below the five-item ISCQ-5; its three-item length made the lower reliability acceptable.

Because the IPSS-3 uses merely three items instead of five, the decline in reliability was regarded as acceptable. In the second study, the IPSS-3 showed high loadings on a single factor, meaning the three questions mainly captured one shared pattern.

Its reliability was lower but still acceptable, and its links with three validation scales were significant and in the expected direction, suggesting a definite and reasonable association. The reported comparisons found significant differences in impostor-feeling intensity by gender, with the female and diverse group showing higher values, and between people with and without a migrant origin, with the group possessing a migrant origin showing higher values.

However, no significant difference in impostor-feeling intensity was found between people with and without a university degree. The results point to the relevance of social and demographic characteristics in how impostor feelings are experienced. The gender difference was consistent with numerous other studies, suggesting that this pattern is not isolated to this study alone.

The findings have limits: the data concern only the German version, and the study recommends using only that version until English or other language versions are validated. All findings came from self-reports, so the study did not provide links with real-life measures or other sources of information, and the participants were not drawn in a way that supports generalizing to the whole population.

Large-scale evidence is still missing, so larger data collections using the IPSS-3 remain an important next step for understanding who experiences impostor feelings and how those feelings change. This study presents a three-question measure for tracking impostor feelings in larger and longer studies.

It also suggests those feelings differ across some social groups, while education alone did not separate people in the reported comparison.