If you refer to David Barlow’s UP and his perception of psychological disorders art therapy would serve as a good complement. In depression the healing process could be visualized by “colours or shades” towards a lighter mood. David Barlow finds that psychological disorders share an underlying structure made up of a generalized biological vulnerability, a generalized psychological vulnerability, and of specific psychological vulnerability. In Barlow's model, vulnerabilities ‘are activated by current stress and a disorder emerges. Art therapy as a form of psychotherapy that uses art media as its primary mode of communication fits a wide range of difficulties, disabilities or diagnoses. These include, for example emotional and mental health problems. References:
J Consult Clin Psychol. 2014 Jul 21. An Idiographic Analysis of Change Processes in the Unified Transdiagnostic Treatment of Depression. Boswell JF, Anderson LM, Barlow DH.
Development of a Unified Protocol for the Treatment of Emotional Disorders in Youth. Jill T. Ehrenreich, Clark M. Goldstein, Lauren R. Wright, and David H. Barlow