Abstract
The wide array of symptoms of and high comorbidity rates between unipolar depressive and anxiety-related disorders have raised questions about the relations among their symptoms. Factor analysis examines these relations, yet factor-analytic symptom-measurement models have relied on a single method of measurement and do not always replicate. We conceptually replicate and extend the trilevel model of anxiety and depression symptoms to encompass interviewer-rated symptoms. In the trilevel model, symptom-specific items load on three levels of factors: a narrow (or disorder-specific) factor, an intermediate-breadth factor, and a general-distress factor. The trilevel model fit well in this sample and fit better than comparison models that eliminated one of the three levels. Extension analysis successfully integrated interviewer-rating variables into the trilevel model—particularly for the broad and narrow levels. These results provide some support for the trilevel model and the use of interviewer ratings of symptoms. Research and treatment implications are discussed.
Keywords
Get full access to this article
View all access options for this article.
References
Supplementary Material
Please find the following supplemental material available below.
For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.
For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.
