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Contemporary Psychometric Evaluation of the Obsessive­Compulsive Inventory– Revised


Wootton, BM and Diefenbach, G and Bragdon, LB and Steketee, GS and Frost, R and Tolin, D, Contemporary Psychometric Evaluation of the Obsessive Compulsive Inventory- Revised, ABCT 48th Annual Convention, 20-23 November, 2014, Philadelphia, Pennsylvania (2014) [Conference Extract]

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Traditionally, hoarding symptoms were coded under Obsessive­Compulsive Disorder (OCD), however, in DSM­5 hoarding symptoms are classified into a new independent diagnosis, Hoarding Disorder (HD). This change will likely have a considerable impact on the self­report scales that are commonly used to assess symptoms of OCD, as these scales often include items measuring symptoms of hoarding. This study evaluated the psychometric properties ofone of the most commonly used self­report measures of OCD symptoms, the ObsessiveCompulsive Inventory­Revised (OCI­R), in a sample of 474 individuals with either OCD (n = 118), HD (n = 201) or no current or past psychiatric disorders (healthy control; HC) (n = 155). For the purposes of this study the OCI­R was divided into two scales; the OCI­OCD (measuring the 5 dimensions of OCD) and the OCI­HD (measuring the hoarding dimension). Criterion validity was demonstrated for both measures; on the OCI­HD, the HD sample scored higher than the HC and OCD groups (p's = <.001) and on the OCI­OCD, the OCD group scored significantly higher than did the HC and HD groups (p's = <.001). Both scales also demonstrated good convergent and divergent validity. The OCI­HD correlated strongly with the SI­R (r =.94) and HRS (r =.89) and only moderately with a measure of anxiety (BAI r =.36). Similarly, the OCIOCD correlated more strongly with a measure of anxiety (BAI r =.61) than with measures of hoarding (SI­R r =.06; HRS r =­.01). Cronbach's alphas for both scales were high (r =0.94 for the OCI­HD and r =0.92 for the OCI­OCD). Receiver operating characteristic analyses were conducted in order to ascertain the diagnostic sensitivity and specificity of the OCI­HD and OCIOCD scales. On the OCI­HD, the area under the curve (AUC) was .97 (95% CI: .95­.98) and a cutoff score of 6 provided the best balance between sensitivity and specificity. On the OCI­OCD the AUC was .91 (95% CI: .89­.94) and a cut score of 12 provided the best balance between sensitivity and specificity. The results of this study highlight the potential of the OCI­R as a screening measure for individuals with OCD and HD and demonstrate the utility of separate clinical cut offs for assessing likely diagnosis of both HD and OCD.

Item Details

Item Type:Conference Extract
Keywords:OCD; hoarding disorder; obsessive compulsive inventory
Research Division:Psychology
Research Group:Clinical and health psychology
Research Field:Health psychology
Objective Division:Health
Objective Group:Provision of health and support services
Objective Field:Mental health services
UTAS Author:Wootton, BM (Dr Bethany Wootton)
ID Code:97196
Year Published:2014
Deposited By:Psychology
Deposited On:2014-12-05
Last Modified:2014-12-08

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