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Psychometric Properties of Thought Fusion Instrument (TFI) in Students

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Author(s): Kazem Khoramdel | Mehdi Rabiee | Hossein Molavi | Hamid Taher Neshatdoost

Journal: Iranian Journal of Psychiatry and Clinical Psychology
ISSN 1735-4315

Volume: 16;
Issue: 1;
Start page: 74;
Date: 2010;
Original page

Keywords: Obsessive-compulsive disorder; factor analysis; psychometrics

ABSTRACT
Objectives: Thought fusion is an important psychological construct of metacognitive model related to obsessive-compulsive disorder. In the present study the psychometric characteristics of “Thought Fusion Instrument” (TFI) was assessed in Students of Isfahan University. Method: After translating the original version, the final form of TFI was administered to 130 undergraduate students of Isfahan University. To examine the reliability of the TFI, methods of internal consistency (Cronbach’s alpha and split-half coefficient) were used, and validity was assessed using convergent validity, discrimination validity and factor analysis. Results: Internal consistency indicated the alpha coefficients to be 0.87, 0.77, 0.82, 0.80, and 0.73 for the total, first, second, and third factors and split-half coefficient respectively. Multivariate analysis of variance (MANOVA) for assessing diagnostic validity between the patient and the normal group indicated that the two groups have significant difference (p
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