1. Design for a future study.

Method	Allocation: Randomised and described in detail in the study protocol and report. Appropriate measures to maintain allocation concealment needs to be implemented. Blinding: The trial should be double‐blind. Outcome Assessor: Researchers assessing outcome should be different from those who delivered the psychological interventions and should also be blind to the nature of the intervention. Duration: One year or more
Participants	Age: 13 to 18 years Gender: Equal representation of both genders Diagnosis: adolescents with psychosis as per clear operational criteria N = 200 Setting: Outpatient setting is preferred. Patients requiring admission to inpatient adolescent units may not be an ideal group to received structured therapy. A combination of inpatient and outpatients will make the study population heterogenous.
Intervention	Technique of psychotherapy: Cognitive remediation therapy, cognitive behaviour therapy, family therapy or group therapy. Duration of psychological intervention: at least 8 weeks Comparator: Treatment‐as‐usual
Outcome	Primary outcomes: Global state: Improved to significant degree Mental state: Significant clinical improvement as suggested by change of psychopathology score or relapse Global functioning: Significant change in global functioning as suggested by global functioning score or return to academic education or vocational training Leaving the study early: Intention‐to‐treat analysis should be conducted taking into account all participants in the intervention and comparator arms following randomisation even if they have left the study early. Comparative data for both groups should be presented. Service utilisation: Number of inpatient admissions and crisis presentations for one year following interventions Quality of life: Significant improvement in quality of life score Economic outcomes: Cost of interventions should be quantified.