Acorn's treatment model [REF] is based on a set of principles which give people affected by addiction a course of action that solves their substance misuse problem [REF].
The Dependency, Emotional, Attachment Programme (DEAP) is another abstinence based treatment Acorn developed which incorporates psychodynamic therapy, Gestalt psychology, Cognitive behavioral therapy and Rational Emotive Therapy in a 12 to 20 week program [REF].