title: Extending the network perspective on comorbidity.
abstract: Cramer et al. make a good case for reconceptualizing comorbid psychopathologies in terms of complex network theory. We suggest the need for an extension of their network model to include reference to latent causes. We also draw attention to a neglected approach to theory appraisal that might usefully be incorporated into the methodology of network theory.
authors.affiliation: Department of Psychology, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand. brian.haig@canterbury.ac.nz
authors.forename: Brian D
authors.initials: BD
authors.lastname: Haig
authors.forename: Frances M
authors.initials: FM
authors.lastname: Vertue
mesh_terms: D015897:Comorbidity; D006801:Humans; D001523:Mental Disorders / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology*; D008960:Models, Psychological