Social Recovery Therapy involves helping severely withdrawn individuals to identify personally meaningful goals and to set up day-to-day achievable activities, can significantly increase their amount of social interaction.
Sussex psychologist Professor David Fowler, who devised the therapy with colleagues at the University of East Anglia and the University of Manchester, said: "Non-affective psychosis - or schizophrenia - affects one percent of the population, with the most at risk group being young people entering adolescence.
"Services currently provided by the health service for sufferers, such as cognitive behavioural therapy (CBT) and medical intervention, are effective - but only for those motivated to engage. There are many more sufferers with complex issues who are left isolated and may continue to be socially disabled across their life course."
The therapy, trailed on 154 patients aged between 16-35 during a two-year period, found that the most effective outcomes were for those who received both the early intervention services provided by the NHS, followed by a nine-month period of Social Recovery Therapy.
During Social Recovery Therapy, patients and therapists worked together in a three-stage programme that involved identifying goals and expectations, followed by preparing pathways to match those goals (including referral to relevant vocational agencies, education providers and community providers of social and sports activities).
The final stage of the programme required patients and therapists to focus on managing debilitating symptoms, such as negative beliefs and feelings of stigma, while engaging in new activities.
"The key to the therapy is to see clients in their own homes and to work closely with them," said Professor Fowler. "We identified those most socially withdrawn as spending less than 30 hours a week outside of their home and found that, through a combination of early intervention services and Social Recovery Therapy, we can increase that weekly structured activity by eight hours.