Document Type
Article
Peer Reviewed
1
Publication Date
9-2008
Volume
20
Journal, Book or Conference Title
Psychological Assessment
PubMed ID
18778161
DOI
10.1037/a0012570
Abstract
We explicated the validity of the Inventory of Depression and Anxiety Symptoms (IDAS; Watson et al., 2007) in two samples (306 college students, and 605 psychiatric patients). The IDAS scales showed strong convergent validity in relation to parallel interview-based scores on the Clinician Rating version of the IDAS (IDAS-CR); the mean convergent correlations were .51 and .62 in the student and patient samples, respectively. With the exception of Well-Being, the scales also consistently demonstrated significant discriminant validity. Furthermore, the scales displayed substantial criterion validity in relation to DSM-IV mood and anxiety disorder diagnoses in the patient sample. We identified particularly clear and strong associations between (a) major depression and the IDAS General Depression, Dysphoria and Well-Being scales; (b) panic disorder and IDAS Panic; (c) posttraumatic stress disorder and IDAS Traumatic Intrusions; and (d) social phobia and IDAS Social Anxiety. Finally, in logistic regression analyses, the IDAS scales showed significant incremental validity in predicting several DSM-IV diagnoses when compared against the Beck Depression Inventory-II (Beck, Steer, & Brown, 1996) and Beck Anxiety Inventory (Beck & Steer, 1990).
Keywords
major depression, anxiety disorders, convergent validity, discriminant validity, criterion validity
NLM Title Abbreviation
Psychol Assess
Published Article/Book Citation
The definitive version was published in Psychological Assessment, 20:3 (2008) pp. 248-259. DOI: 10.1037/a0012570
Rights
Author Posting. Copyright © American Psychological Association, 2008. This article may not exactly replicate the final version published in the APA journal. It is not the copy of record. It is posted here by permission of the APA for personal use, not for redistribution.
URL
http://ir.uiowa.edu/psychology_pubs/5
Comments
This research was supported by National Institute of Mental Health Grant R01-MH068472 awarded to David Watson.