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Interdisciplinaria

versión On-line ISSN 1668-7027

Resumen

RODRIGUEZ BIGLIERI, Ricardo  y  VETERE, Giselle. Argentinian adaptation of the Obsessive Beliefs Questionnaire. Interdisciplinaria [online]. 2008, vol.25, n.1, pp. 53-76. ISSN 1668-7027.

This article is based on a doctoral thesis framework which assesses cognitive profiles in Obsessive Compulsive Disorder (OCD) patients. We have divided the process into the following two studies: a linguistic and conceptual adaptation of the Obsessive Belief Questionnaire - OBQ (Obsessive Compulsive Cognitions Working Group, 2005) and an assessment of the psychometric characteristics of the adapted questionnaire. In the first study, original OBQ items were translated into Spanish and then back into English, as is generally suggested by cross-cultural research methods. We achieved a revised and abbreviated version of the instrument consisting of 31 items. The results, based on a sample of 260 community controls (120 men and 140 women), were factor analyzed and divided into four sub-scales called: (a) Perfectionism and intolerance for uncertainty (PIC), (b) Importance and control of intrusive thoughts (ICT), (c) Responsibility (R), and (d) Overestimation of threat (OT). The above mentioned factorial categories accounted for more than 60% of total variance and were similar to those found by the authors of the original version, with the exception that OT and R sub-scales became two independent factors, while in the original version they were grouped in only one factor. Internal consistency and test/re-test reliability, assessed over a 30 day period, were found to be excellent (α = .937; r = .83, respectively). In the second study, the OBQ-31, the Beck Depression Inventory and the Yale-Brown Obsessive-Compulsive Scale were taken by 30 patients diagnosed with obsessive compulsive disorder (OCD), 40 patients with other anxiety disorders (AC), and 120 community controls (CC). We also factor analyzed data from this total sample (N = 190) and obtained identical results as in the first study. In order to examine the convergent and discriminant validity of the OBQ-31, we did a series of analyses. On the one hand, the results of a one-way ANOVA showed significant differences across groups (F = 79.853; gl = 2; p < .000) in relation to the total scores of OBQ-31. Post hoc comparisons showed that OCD group patients had significantly higher scores than both AC and CC groups. The AC group, in turn, scored significantly higher than the CC group. Furthermore, a Pearson correlation between the Y-Bocs and the OBQ-31 scores of the OCD group was calculated, resulting in a significant correlation between both instruments (r = .715; p < .004). Our next step involved using the total sample (N = 190) to explore correlations between the OBQ-31 and the BDI scores; however, our findings were low and non significant (r = .161; p = .80). Later, the coefficient was estimated again, this time considering scores obtained by both clinical groups (n = 70). The correlation coefficient was low again, although significant at a statistical level (r = .31; p < .05). Consequently, both convergent and discriminant validity analyses proved satisfactory. The obtained data and results are preliminary, and will require further research to solidify the validity of OBQ-31.

Palabras llave : Beliefs; Cognitive assessment; Obsessive Compulsive Disorder; Obsessive Beliefs Questionnaire.

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