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In this first psychometric evaluation, gamblers ( N = 603) were recruited from treatment- and support-seeking contexts ( n = 79 and n = 185), self-help groups ( n = 47), and a population sample ( n = 292). Participants completed self-report measures, a GDIT retest ( n = 499), as well as diagnostic semistructured interviews assessing gambling disorder (GD; n = 203). The GDIT showed excellent internal consistency reliability (\u03b1 = .94) and test\u2013retest reliability (6-16 days, intraclass correlation coefficient = 0.93). Confirmatory factor analysis yielded factor loadings supporting the three proposed GDIT domains of gambling behavior, gambling symptoms, and negative consequences. Receiver operator curves and clinical significance indicators were used to estimate GDIT cut-off scores in relation to recreational (&lt;15) and problem gambling (15-19), any GD (\u226520), mild GD (20-24), moderate GD (25-29), and severe GD (\u226530). The GDIT can be considered a valid and reliable measure to identify and predict GD severity, as well as problem gambling. In addition, the GDIT improves content validity in relation to an international research agreement concerning features of gambling outcome measures, known as the Banff Consensus Agreement.<\/jats:p>","DOI":"10.1177\/10731911211046045","type":"journal-article","created":{"date-parts":[[2021,10,7]],"date-time":"2021-10-07T07:46:49Z","timestamp":1633592809000},"page":"225-237","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":17,"title":["The Gambling Disorders Identification Test (GDIT): Psychometric Evaluation of a New Comprehensive Measure for Gambling Disorder and Problem Gambling"],"prefix":"10.1177","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5348-051X","authenticated-orcid":false,"given":"Olof","family":"Molander","sequence":"first","affiliation":[{"name":"Karolinska Institutet, Solna, Sweden"},{"name":"Stockholm Region Health Services, Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter","family":"Wennberg","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Solna, Sweden"},{"name":"Stockholm University, Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7709-0230","authenticated-orcid":false,"given":"Anne H","family":"Berman","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Solna, Sweden"},{"name":"Stockholm Region Health Services, Stockholm, Sweden"},{"name":"Stockholm University, Stockholm, Sweden"},{"name":"Uppsala University, Uppsala, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2021,10,7]]},"reference":[{"key":"bibr1-10731911211046045","volume-title":"Diagnostic and statistical manual of mental disorders","author":"American Psychiatric Association","year":"1987","edition":"3"},{"key":"bibr2-10731911211046045","volume-title":"Diagnostic and statistical manual of mental disorders","author":"American Psychiatric Association","year":"1994","edition":"4"},{"key":"bibr3-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"key":"bibr4-10731911211046045","volume-title":"Psykometrisk utv\u00e4rdering av G-DIT\u2014ett nytt screeningformul\u00e4r f\u00f6r hasardspelsyndrom","author":"Bergvik A.","year":"2019"},{"key":"bibr5-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1159\/000081413"},{"key":"bibr6-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1046\/j.1360-0443.2002.00015.x"},{"key":"bibr7-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1093\/acprof:oso\/9780195367621.001.0001"},{"key":"bibr8-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1556\/2006.5.2016.073"},{"key":"bibr9-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1007\/s40429-016-0118-7"},{"key":"bibr10-10731911211046045","doi-asserted-by":"publisher","DOI":"10.1097\/00004583-199705000-00011"},{"key":"bibr11-10731911211046045","volume-title":"A first course in factor analysis","author":"Comrey A. 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