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The Impostor Phenomenon (IP) is a characteristic, which is composed of cognitions of inauthenticity, in conjunction with fear of failure, as well as fear of being exposed as a fraud. The IP was first described by Clance (1985), who also developed an accompanying questionnaire. However, this questionnaire left room for optimization (item content, pysychometric properties, and the representing IP as a multidimensional construct). Therefore, we developed an item pool of 450 new items based on the theoretical foundation. The core element characteristics are measured using the theoretically derived scales: Competence Doubt, Working Style, Alienation, Other-Self Divergence, Frugality and Need for Sympathy. Based on a German sample (N = 771, 51% female), aged 18 to 70 years, exploratory and confirmatory factor analysis resulted in a selection of 31 items. The six scales show satisfactory internal consistencies between .69 and .92. Initial construct validity showed positive correlations with convergent (Neuroticism) and discriminant measures (Self-Esteem). The Impostor-Profile (IPP31) is a theoretically founded multidimensional german questionnaire that can be applied in research and practice.

Background Concern over medical students’ well-being is a global issue, with studies showing high psychological distress rates. Impostor Phenomenon (IP), i.e., underestimating one’s abilities, attributing success to external factors, and feeling like a fraud, has been implicated as one reason behind these troubling findings. Meanwhile, resilience has been suggested to protect against psychological distress. This study aimed to investigate the prevalence of IP and its association with resilience among undergraduate medical students. Methods The Clance Impostor Phenomenon Scale (CIPS), the Brief Resilience Scale (BRS), and sociodemographic questions were completed by 457 medical students registered in their 2-10th semester at a Swedish university. Of the respondents, 62.6% identified as women, 36.1% as men, and 1.3% as others. Results The prevalence of IP was 58.4% (defined as CIPS score  ≥  62). According to the CIPS scoring guidelines, 10.3% of participants had low IP, 29.5% moderate, 41.6% frequent, and 18.6% intense IP. Of all participants, almost 90% experienced at least moderate and 60.2% frequent to intense IP. Women had significantly higher CIPS scores and lower BRS scores than men. In contrast, neither attending semester nor age group significantly impacted CIPS scores. Finally, there was a moderate inverse correlation between the level of resilience and the prevalence of IP. Conclusions Our findings suggest that the majority of Swedish medical students feels like an impostor, and of these students, most do so frequently. Furthermore, IP is more prevalent among female students – who also show lower levels of resilience. Moreover, our results indicated that IP could hinder achieving higher resilience. Future longitudinal studies should investigate how gender norms may contribute to IP feelings and explore the potential advantages of counteracting IP and strengthening resilience among medical students. However, targeted interventions addressing individual students’ IP and resilience are insufficient. There is also a need to address structural aspects of the educational environment, such as gender stereotypes, that may contribute to IP.

Although the imposter phenomenon (IP), characterized by fear of exposure as a fraud, is prevalent in higher education, studies disagree about its dimensionality, its relation to individual characteristics, and how IP relates to self-evaluation. Analyzing data from 959 graduate students and professionals in science, technology, engineering, mathematics (STEM), and medicine, we examined the psychometric properties of the Clance IP scale and evaluated IP’s conceptual clarity in relation to demographics and self-evaluation. Factor analyses yielded three factors: Self-Doubt, Fear of Evaluation, and Luck. Older age groups, people currently not in-training, and men had lower sub-scale IP scores. We created four IP groups using factor scores and found that “Fear IP” (low self-doubt/high fear) and “High IP” (high self-doubt/high fear) groups reported less positive self-evaluations than “Self-Doubt” IP (high self-doubt/low fear) and “Low IP” (low self-doubt/low fear) groups. Findings suggest different types of IP that includes more strategic self-presentations of ability, and the defining feature of IP may be fear rather than self-doubt, with implications on training in higher education.

Background Impostor phenomenon is a term used to describe feelings of intellectual and professional fraudulence. The Clance Impostor Phenomenon Scale and the Leary Impostorism Scale are two self-report measures used to determine whether an individual experiences impostor phenomenon. This study examined the psychometric properties of both measures in healthcare simulation educators. Methods The study sample comprised 148 educators, 114 (77%) females, 34 (23%) males, who completed an online version of each instrument. Exploratory factor analysis was used to examine the factor structure of the Clance Impostor Phenomenon Scale and the Leary Impostorism Scale. Results Exploratory factor analysis revealed that for both instruments a one-factor solution best fit the data, suggesting all items in both measures fit onto a single theoretical construct. Both instruments demonstrated high internal reliability, with the Cronbach’s alpha for the Clance Impostor Phenomenon Scale being α = .96 and the Leary Impostorism Scale α = .95. Conclusions This study suggests that impostor phenomenon as measured by the Clance Impostor Phenomenon Scale and the Leary Impostorism Scale is a unidimensional construct among healthcare simulation educators. With a growing interest in impostor phenomenon, the present findings will assist researchers to evaluate the phenomenon in healthcare settings.