“…The problem of comorbidity is not limited to the Diagnostic and Statistical Manual of Mental Disorders (DSM; American Psychiatric Association, 2013), nor even necessarily to categorical taxonomies (though the term implies discrete disease states). For instance, the strong, positive correlation between depression and anxiety is a well-known and well-established phenomenon shown to manifest across clinical and nonclinical populations and between both categorical and dimensional representations (Brown, Chorpita, & Barlow, 1998;Clark & Watson, 1991;Clark, Watson, & Mineka, 1994;Costello, 1976;Dobson, 1985a, Dobson, 1985bGotlib, 1984;Mineka, Watson, & Clark, 1998;Watson & Clark, 1984;Watson, Clark, & Carey, 1988). It has been argued that the covariance between mood and anxiety-at both dimensional and categorical levels of analysis-is due to underlying hierarchical constructs such as negative affectivity and neuroticism (cf.…”