Psychometric properties of the Spanish version of the Interpretation of Intrusions Inventory (III)

Current cognitive models assign a special importance to cognitive negative intrusions in the origin and maintenance of obsessions. The Interpretation of Intrusions Inventory (III) has been developed to assess the appraisal of this type of intrusive cognitions. The objective of the present study is to examine the psychometric properties of the Spanish version of the III in two non-clinical groups: undergraduate students and adults from the general population. Results show that the III has an adequate internal consistency and test-retest reliability. The factor structure of III and its relationships to associated cognitive variables (v.g., inflated responsibility and perfectionism) and obsessive-compulsive type symptomatology are presented. Given the similarity with the original English version, it is concluded that the Spanish version of the III merits further study in the research on obsessive-compulsive disorder and related disorders in which negative cognitive intrusions are present.