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• W2896087544 abstract "Background: The psychometric properties of the Life Orientation Test-Revised (LOT-R) have been established among college students, yet psychometric evidence is lacking for a sample of student Veterans in postsecondary education.Aims: The purpose of this study was to evaluate psychometric properties of the LOT-R for the assessment of dispositional optimism in student Veterans by using classical test theory (CTT) in conjunction with item response theory (IRT).Method: A sample of 205 student Veterans were recruited from universities across the United States. Exploratory factor analysis was conducted to test the unidimensionality of the LOT-R. A polychotomous IRT model using graded response model (GRM) was estimated. Reliability and concurrent validity of the LOT-R were tested.Results: CTT in conjunction with IRT validated that the LOT-R is a psychometrically sound unidimensional instrument for assessing the levels of dispositional optimism in student Veterans. The LOT-R was found to be associated with hope, resilience, PERMA, life satisfaction, depression, and anxiety in the theoretically expected directions. The internal consistency reliability coefficient was computed to be .86.Conclusions: Given its reliability and validity and applicability among this specific population, clinicians, educators, and researchers might use the LOT-R to assess and monitor dispositional optimism among student Veterans." @default.
• W2896087544 created "2018-10-26" @default.
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• W2896087544 date "2018-10-16" @default.
• W2896087544 modified "2023-09-26" @default.
• W2896087544 title "Measuring dispositional optimism in student Veterans: An item response theory analysis" @default.
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• W2896087544 doi "https://doi.org/10.1080/08995605.2018.1522161" @default.
• W2896087544 hasPublicationYear "2018" @default.
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