The Mobility Inventory for Agoraphobia Avoidance Alone Scale: Factor Structure and Psychometric Properties of Subscales.

In this study, we investigated the factor structure of situational fears in agoraphobia by examining four models of the Avoidance Alone items in the Mobility Inventory for Agoraphobia. A main sample of 327 agoraphobic patients and an independent control sample of 64 agoraphobic patients were studied. A confirmatory factor analysis supported a four-factor model including a public places, an enclosed spaces, a public transportation, and an open spaces factor both for pre- and posttreatment data. The convergent and divergent validity of subscales derived from the four factors were supported by an expected pattern of correlations with interview-based measures. These subscales also proved to have satisfactory internal consistencies in the independent sample.