David van den Berg, member of ISPS, defended his thesis that trauma therapy for PTSD can be done also with clients suffering from psychosis. He compared 3 groups of clients, one who got EMDR, one group who got exposure and one waiting list. Some were for years and years in the system. It worked fine!
Look for yourself his thesis is on line: http://dare.ubvu.vu.nl/handle/1871/55012
Eye Movement Desensitization and Reprocessing
This method appears also to be useful for persons with psychosis see Pdf guideline
A Manual, see google book
Exposure Therapy for PTSD
This one too. Exposure Therapy for PTSD, Jennifer H. Wortmann, Jonathan Larson, Rebecca Lubin, Alexander H. Jordan, Brett T. Litz See Pdf
A course from Ron Unger
Develop a humanistic understanding of how adverse life events can lead to reactions such as dissociation and psychosis, and then learn approaches and skills which will allow you to support people in changing those reactions and turning toward recovery!
Trauma-Focused Treatment in PTSD Patients With Psychosis: Symptom Exacerbation, Adverse Events, and Revictimization
Trauma Screening Questionnaire
Do you want to know how many persons in your case load suffer from PTSD?
Predictive validity of the Trauma Screening Questionnaire in detecting post-traumatic stress disorder in patients with psychotic disorders, Paul A. J. M. de Bont, David P. G. van den Berg, Berber M. van der Vleugel, Carlijn de Roos, Ad de Jongh, Mark van der Gaag and Agnes van Minnen see Pdf