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The Techniques for Overcoming Depression Questionnaire: Mokken Scale Analysis, Reliability, and Concurrent Validity
Kenneth E Freedland1, Mariantonia Lemos2, Frank Doyle3
1Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri USA.
Objectives:
The Techniques for Overcoming Depression (TOD) questionnaire assesses the frequency with which patients being treated for depression use cognitive-behavioral techniques in daily life. This study examined its latent structure, reliability and concurrent validity in depressed cardiac patients.
Method:
The TOD was administered at the initial and final treatment sessions in three trials of cognitive behavior therapy (CBT) (n = 260) for depression in cardiac patients. Mokken scaling was used to determine its dimensionality.
Results:
The TOD is unidimensional in depressed cardiac patients, both at the initial evaluation (H = .46) and the end of treatment (H = .47). It is sensitive to change and the total score correlates with therapist ratings of the patient's socialization to CBT (r=.40, p<.05), homework adherence (r=0.36, p<0.05), and use of cognitive-behavioral techniques (r=.51, p<.01). TOD scores were associated with post-treatment depression scores in two of the trials (p<.01 in both analyses).
Conclusions:
The TOD is a unidimensional, reliable, valid, and clinically informative measure of self-reported use of cognitive-behavioral techniques for overcoming depression in cardiac patients. Studies of the TOD in other depressed patient populations are needed.
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