<Li> Out - session--a large portion of therapeutic work is intended to happen outside of session (e.g. bibliotherapy, rational emotive behavior therapy) </Li> <P> The methods used are also different in regards to the population being served as well as the context and nature of the problem . Therapy will look very different between, say, a traumatized child, a depressed but high - functioning adult, a group of people recovering from substance dependence, and a ward of the state suffering from terrifying delusions . Other elements that play a critical role in the process of psychotherapy include the environment, culture, age, cognitive functioning, motivation, and duration (i.e. brief or long - term therapy). </P> <P> Many clinical psychologists are integrative or eclectic and draw from the evidence base across different models of therapy in an integrative way, rather than using a single specific model . </P> <P> In the UK, clinical psychologists have to show competence in at least two models of therapy, including CBT, to gain their doctorate . The British Psychological Society Division of Clinical Psychology has been vocal about the need to follow the evidence base rather than being wedded to a single model of therapy . </P>

Who is considered to be the first to engage in the clinical practice of forensic psychology