Received: 17 July 2018 | Revised: 10 December 2018 | Accepted: 10 January 2019 DOI: 10.1111/cpsp.12278 LITERATURE REVIEW What is an emotional disorder? A transdiagnostic mechanistic definition with implications for assessment, treatment, and prevention Jacqueline R. Bullis1,2 | Hannah Boettcher1 | Shannon Sauer‐Zavala1 | Todd J. Farchione1 | David H. Barlow1 1Center for Anxiety and Related Disorders, Boston University, Boston, Abstract Massachusetts We present a transdiagnostic definition of the commonly used, but poorly defined, 2Division of Depression and term emotional disorder. This definition transcends and possibly complements tradi- Anxiety Disorders, Harvard Medical tional descriptive diagnostic categories, and candidate dimensional models of psy- School, McLean Hospital, Belmont, Massachusetts chopathology by focusing on putative mechanisms that contribute to the onset and maintenance of disorders characterized primarily by dysfunction in the interpretation Correspondence and regulation of emotion. We review three intermediate transdiagnostic mecha- Jacqueline R. Bullis, Division of Depression and Anxiety Disorders, Harvard Medical nisms that characterize emotional disorders, such as, but not limited to, anxiety and School, McLean Hospital, Belmont, MA. depressive disorders, and then illustrate how this proposed definition applies to ad- Email:
[email protected] ditional diagnoses beyond anxiety and depression. Implications of this new concep- tualization of disorders of emotion are then discussed in the context of assessment, treatment, and prevention. KEYWORDS classification, comorbidity, emotional disorders, transdiagnostic 1 | INTRODUCTION the frequent use of the term emotional disorder, in the ab- sence of explicit operationalization, has only contributed to The aim of this article is to define a term that has been widely an illusory consensus whereby the same term is being used used by both researchers and practitioners in the field since with different meanings.