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The Observer Alexithymia Scale: a reliable and valid alternative for alexithymia measurement?
Reitske Meganck1, Stijn Vanheule, Mattias Desmet
1Department of Psychoanalysis and Clinical Consulting, Ghent University, Ghent, Belgium.
Abstract:
In this study, we evaluated the reliability and validity of the Dutch version of the Observer Alexithymia Scale (OAS; Haviland, Warren, & Riggs, 2000) while addressing shortcomings of earlier research. Internal consistency and test-retest reliability were found to be adequate, whereas interrater reliability was insufficient. The original five-factor model (Distant, Uninsightful, Somatizing, Humorless, Rigid) with item parcels showed excellent fit, indicating adequate translation. Alternative models were tested to overcome problems with the parcel method, and all showed poor fit. OAS total scores correlated .23 with the 20-item Toronto Alexithymia Scale (Bagby, Parker, & Taylor, 1994; Bagby, Taylor, & Parker, 1994) and .50 with the Toronto Structured Interview for Alexithymia (Bagby, Taylor, Parker, & Dickens, 2006). These problematic results on validity compromise the use of the OAS as an alexithymia measure.
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