Transdiagnostic cognitive-behavioral group treatments for anxiety, treatments that are designed to be applicable to diagnostically mixed groups of anxiety disorder clients, have been garnering interest in recent years. At least 7 independent research teams have developed transdiagnostic anxiety treatment protocols and reported preliminary outcomes data. In this review, we outline the basic theoretical rationale underlying transdiagnostic models of anxiety and review each of the treatment protocols that have been reported to date. Finally, the efficacy of these treatments is examined using meta-analytic methods. Results indicated that overall, transdiagnostic treatments are associated with a very large pre- to posttreatment effect size, and stable maintenance of gains through follow-up. Recommendations for transdiagnostic treatment implementation are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

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Clark and Watson's (1991) tripartite model is commonly viewed as the preferred model for examining the relationship between anxiety and depression. The tripartite model proposes that the overlap and distinction between anxiety and depression can be best understood along three dimensions: positive affect, negative affect, and physiological hyperarousal. Although the tripartite model has received support in a wide variety of samples, little has been done to examine whether the tripartite model holds cross-culturally. Using a highly diverse sample of undergraduate students (n = 923), this study set out to determine the generalizability of the tripartite model among students who identified themselves as African American/Black (non-Hispanic), Caucasian/White (non-Hispanic), Hispanic/Latino(a), and Asian. The results of the present study suggest that the model fits generally for each group, but the study did not find cross-group equivalence in the relationships between constructs. Possible reasons for the lack of cross-group equivalence, as well as limitations of this study, are also discussed.