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Covert safety-seeking behaviour may maintain disorders by preventing corrective learning and is therefore important to identify effectively.<\/jats:p><\/jats:sec><jats:sec id=\"S1352465820000703_as2\"><jats:title>Aims:<\/jats:title><jats:p>This study presents the validation and psychometric analyses of a novel measure of covert and overt, general and social\/relational threat-related interpersonal RS.<\/jats:p><\/jats:sec><jats:sec id=\"S1352465820000703_as3\"><jats:title>Method:<\/jats:title><jats:p>An initial 30-item measure was administered to an undergraduate sample (<jats:italic>N<\/jats:italic> = 1626), as well as to samples of individuals diagnosed with obsessive compulsive disorder (OCD; <jats:italic>n<\/jats:italic> = 50), anxiety disorders (<jats:italic>n<\/jats:italic> = 60) and depression (<jats:italic>n<\/jats:italic> = 30). The data were subjected to exploratory and confirmatory factor analyses, and validation analyses.<\/jats:p><\/jats:sec><jats:sec id=\"S1352465820000703_as4\"><jats:title>Results:<\/jats:title><jats:p>An exploratory factor analysis using principal axis factoring with oblique rotation yielded five interpretable factors, after removing four complex items. The resulting 26-item measure, the Covert and Overt Reassurance Seeking Inventory (CORSI), evidenced good convergent and divergent validity and accounted for 54.99% of the total variance after extraction. Factor correlations ranged from <jats:italic>r<\/jats:italic> = .268 to .736, suggesting that they may be tapping into unique facets of RS behaviour. In comparison with undergraduate participants, all clinical groups had significantly higher total scores [<jats:italic>t<\/jats:italic> (51.80\u2013840) = 3.92\u20135.84, <jats:italic>p<\/jats:italic> &lt; .001]. The CFA confirmed the five-factor model with good fit following the addition of four covariance terms (goodness of fit index = .897, comparative fit index = .918, Tucker\u2013Lewis index = .907, root mean square error approximation = .061).<\/jats:p><\/jats:sec><jats:sec id=\"S1352465820000703_as5\"><jats:title>Conclusion:<\/jats:title><jats:p>The CORSI is a brief, yet comprehensive and psychometrically strong measure of problematic RS. With further validation, the CORSI has potential for use within clinical and research contexts.<\/jats:p><\/jats:sec>","DOI":"10.1017\/s1352465820000703","type":"journal-article","created":{"date-parts":[[2020,10,13]],"date-time":"2020-10-13T01:56:05Z","timestamp":1602554165000},"page":"3-20","source":"Crossref","is-referenced-by-count":8,"title":["The Covert and Overt Reassurance Seeking Inventory (CORSI): Development, validation and psychometric analyses"],"prefix":"10.1017","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2807-184X","authenticated-orcid":false,"given":"Adam S.","family":"Radomsky","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1175-1235","authenticated-orcid":false,"given":"Rachael L.","family":"Neal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chris 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