Psychometric Properties of Thought Fusion Instrument (TFI) in Students

Transcription

1 Iranian Journal of Psychiatry and Clinical Psychology, Vol. 6, No., Spring 00, 7-78 Short Scientific Article Psychometric Properties of Thought Fusion Instrument (TFI) in Students Kazem Khoramdel*, Mehdi Rabiee a, Hossein Molavi b, Hamid Taher Neshatdoost c Abstract Objectives: Thought fusion is an important psychological construct of metacognitive model related to obsessivecompulsive 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 0 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., 0.8, 0.80, and 0.7 for the total, first, second, and third factors and splithalf 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<0.00) regarding the total factor and its subsets. The correlation coefficient of TFI with Thought-Action Fusion was The results of factor analysis using varimax rotation showed three factors:. Thought action fusion,. Thought object fusion,. Thought event fusion. Conclusion: TFI has satisfactory reliability and validity in Iranian sample and can be used for diagnosis and treatment. Key words: Obsessive-compulsive disorder; factor analysis; psychometrics [Received: February 009; Accepted: July 009] :. - :.. 0 ) ( : (). 7.(p<00) :.. - : [88//0 : 87// : ] 7 7 ) :.. Khoramdelpsycho@gmail.com(. * Corresponding author: MS. in Psychology, Isfahan University. School of Psychology and Educational Sciences, Isfahan University, Hezar Jarib St., Isfahan, Iran, IR. Fax: Khoramdelpsycho@gmail.com; a MS. in Clinical Psychology; b PhD. in Psychology, Professor of Isfahan University; c PhD. in Clinical Psychology, Associate Prof. of Isfahan University.

2 / / Vol. 6 / No. / Sprng 00 TFI ).(. ) (TAF-R) 6 - ( (000 ) 8. 9 DSM-IV-TR.. 0.(86 ) - Obsessive-Compulsive Disorder - thoughts content - O'Conner - Aardema 5- Pelissier 6- rituals 7- Thoughts Fusion 8- Wells 9- Bleuler 0- Shafran - Rachman - omnipotence of thoughts - Gwilliam - Cartwright-hatton 5- thought action fusion 6- intrusive thoughts 7- Rassin 8- Merckelbach 9- Muris 0- Spaan - Emmelkamp - Thoughts Fusion Inventory - Adrian Wells - Cochran 5- convergent validity 6- Thought-Action Fusion-Revised 7- Thordarson 8- discrimination validity 9- Diagnostic and Statistical Manual of Mental Disorders (th. ed.), Text Revision 0- construct validity - internal consistency - split-half coefficient -. 5 (OCD) (00). 6. (TF) 7 TF.(000 ) 9) «9 ]» (00» 8 0 [«OCD. - (TAF) ).(00 5.( (999) 7 ) -. TAF. (00 ) (TFI) -.. ) ( ). TFI ( TFI ( )

3 (TFI) (n=66) (n=6) (TAF-R) - ( ) ( 59/7) 88/ 0 TFI 80 0 ( 7/8) ( 9/) 7/ 76 TAF 7 0 ( /) / (TFI) - (TAF-R) *TFI - **TAF - ***TOF - ****TEF - *****TAF-R -5 - ** (p<00) * - **** - *** p<00 - ***** ) - (TFI) ( / Thought Object Fusion - Thought Event Fusion - Meta-cognitive Belief Questionnaire - Myers 5- Fisher 6- test-retest 7- Beliefs About Rituals Inventory 8- Stop Signals Questionnaire 9- The Obsessive Compulsive Inventory 0- Yale-Brown Obsessive Compulsive Scale - Amir - Freshman - Ramsey - Neary 5- Brigidi : ) (TFI) -.(00 - TFI. (TOF) - :. -.(TEF) 00 ) - (TAF) ( TFI (00)..(89 ) 78 5 (00). TFI - ) (MCQ-0) 0- ) (TAF) 5 - (00. (996 6 (008) OCI-D SSQ. 69 BARI ( ) «TFI» 0 Y-BOCS (996 ) (TAF-R) TFI 7 TAF-R. () (00) 5 TAF-R (008) SPSS-6. Vol. 6 / No. / Spring / /

4 - F 00 7 / 8 TFI / 8 TAF / 7 TOF / 60 TEF 0 / 5 TFI 8 0 / 75 TAF / 05 TOF TEF 0 ) ( ( ). (TFI).(p<00). ) (87) 5 (00). ( (00) / / Vol. 6 / No. / Sprng (00) (00) - ( :. - ( - ( 0.. (00) (00) TAF-R. TFI 65. (00) -5 TEF TOF TAF

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