A bifactor model of the Posttraumatic Growth Inventory

Health Psychology and Behavioral Medicine
Barna Konkolÿ ThegePiroska Balog

Abstract

Purpose: The Posttraumatic Growth Inventory (PTGI) is a self-administered measurement instrument designed to provide information concerning positive psychological changes after a traumatic life event. The aim of the present study was to examine the psychometric properties of the PTGI in a Hungarian sample. By examining a bifactor model of the instrument, we also wanted to contribute to the establishment of an evidence-based practice concerning the use of different score types (total score versus subscale scores). Methods: Altogether, 691 Hungarian respondents (82.2% female; Mage = 33.0 ± 13.4 years), who experienced some kind of trauma or loss, participated in this study. Results: A series of confirmatory factor analyses revealed that among the tested first- and second-order models, a bifactor model provided the best-fit to our data (χ2/df = 4.32, Comparative Fit Index = .91, root mean square error of approximation = .07, standardized root mean square residual = .04). Further, the Hungarian version of the PTGI showed high internal consistency (Cronbach's alpha = .93, omega total = .95, omega hierarchical = .87) and test-retest reliability (r = .90; p < .01) coefficients. However, omega hierarchical coefficients (.14-.40) and ex...Continue Reading

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Citations

Mar 11, 2017·AIDS Care·Helena Garrido-HernansaizJesús Alonso-Tapia
Jul 19, 2019·Frontiers in Psychology·María LlistosellaJoaquín T Limonero
Oct 31, 2015·Journal of Personality Assessment·Anthony RodriguezMark G Haviland

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