| Yazarlar (4) |
Prof. Dr. Murat BOYSAN
Yüzüncü Yıl Üniversitesi, Türkiye |
Mustafa Güleç
İzmir Katip Çelebi Üniversitesi, Türkiye |
|
Erdem Deveci
Bezm-İ Âlem Vakıf Üniversitesi, Türkiye |
|
Yaşar Barut
Ondokuz Mayıs Üniversitesi, Türkiye |
| Özet |
| Objective: The Vancouver Obsessional Compulsive Inventory (VOCI) is a self-report inventory developedto assess a wide range of obsessive-compulsive symptoms, including contamination (12 items), checking(6 items), obsessions (12 items), hoarding (7 items), just right (12 items), and indecisiveness (6 items). TheEnglish version of the VOCI has been shown to be a promising psychometric instrument, as have its French,Italian, and Spanish versions. The aim of this study was to investigate psychometric properties of the Turkishversion of the VOCI in clinical and non-clinical samples.Method: A questionnaire package including the VOCI, Padua Inventory-Revised (PI-R), Obsessional BeliefsQuestionnaire (OBQ), and Beck Depression Inventory (BDI) was administered to volunteer undergraduates(n=365) and patients with obsessive-compulsive disorder (OCD) (n=46). Psychometric analyses were run toassess reliability and validity of the Turkish version of the VOCI. We converged a confirmatory factor analysisto test the factor structure. We also performed a receiver operating characteristic (ROC) analysis to determinecut-off scores and compared the diagnostic performance of the VOCI and PI-R. Convergent and discriminantvalidity of the VOCI were assessed through Pearson product-moment correlation coefficients. Internalconsistency and temporal reliability were computed.Results: Confirmatory factor analysis replicated the original six-factor structure. The maximum likelihoodfactor loading estimates were higher than 0.40. OCD patients scored significantly higher than controlsubjects on the contamination, checking, obsessions, things just right, and indecisiveness subscales of theVOCI but not on the hoarding subscale. The global VOCI scores highly correlated with the PI-R (r=0.89);correlation between the contamination subscale of the VOCI and washing subscale of the PI-R was r=0.88;correlation between the checking subscales of both screening tools was r=0.83; correlation between thejust right subscale of the VOCI and precision subscale of the PI-R was r=0.71; and correlation between theobsession subscale of the VOCI and rumination subscale of the PI-R was r=0.71. Divergent validity of the VOCIwas also high, so that correlations of the total and subscales of the VOCI with the total and subscales of thePI-R were from r=0.25 to a high of r=0.41; therefore, it can be said that the coefficients ranged from weak tomoderate. These correlation coefficients were indicative of good convergent and divergent validity. Internalconsistency of the VOCI global was 0.97, and that of the VOCI subscales ranged between 0.82 and 0.92 inthe overall sample. Cronbach s Alphas of the VOCI subscales in the OCD group were between 0.73 and 0.88,and in the control group between 0.84 and 0.92. Fifteen-day test-retest intra-correlations for total scores ofthe VOCI were 0.75; for the subscales they ranged from 0.68 up to 0.88. The ROC analysis demonstrated amoderate diagnostic performance for the VOCI cut-off score of 87.5 with a sensitivity of 0.74 and a specificityof 0.73 immediately comparable to the PI-R cut-off point of 67.5.Conclusion: The VOCI had good internal consistency, test-retest reliability, convergent and discriminantvalidity. It is concluded that the Turkish version of the VOCI has sound psychometric properties. Furtherstudies are needed to develop psychometric tools with stronger diagnostic performance for OCD assessment. |
| Anahtar Kelimeler |
| Makale Türü |
Özgün Makale
|
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale |
| Dergi Adı | Klinik Psikofarmakoloji Bülteni |
| Dergi ISSN | 1017-7833 |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Makale Dili | İngilizce |
| Basım Tarihi | 03-2015 |
| Cilt No | 25 |
| Sayı | 1 |
| Sayfalar | 44 / 56 |
