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The objective of the current studies was to clarify the theoretical conceptualization of impostor phenomenon based on experiences in an achievement-oriented setting. We conducted a review of the literature and developed an item pool for a novel impostor phenomenon assessment (IPA) (Study 1). Exploratory factor analyses (Study 1) and confirmatory factor analyses (Study 2) assessed this initial item pool to determine the factor structure and initial psychometric properties of the preliminary IPA (Studies 2 and 3). Our findings offer preliminary evidence for the reliability and validity of the IPA as a novel measure of impostor phenomenon.<\/jats:p>","DOI":"10.1177\/10731911221141870","type":"journal-article","created":{"date-parts":[[2023,1,2]],"date-time":"2023-01-02T07:38:23Z","timestamp":1672645103000},"page":"2162-2183","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":26,"title":["Development, Factor Structure, and Psychometric Validation of the Impostor Phenomenon Assessment: A Novel Assessment of Impostor Phenomenon"],"prefix":"10.1177","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0604-1028","authenticated-orcid":false,"given":"Deanna L.","family":"Walker","sequence":"first","affiliation":[{"name":"University of Western Ontario, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donald H.","family":"Saklofske","sequence":"additional","affiliation":[{"name":"University of Western Ontario, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2023,1,2]]},"reference":[{"key":"bibr1-10731911221141870","author":"Ahlfeld A. 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