This study adhere to the model for research made by the international Virtual Reality Clinical Outcomes Research Experts groups (VR-CORE). The study consist of three sub-studies. First a qualitative study assessing the acceptability for VR among adolescence with psychosis. Secondly, a randomized study of the feasibility of virtual reality environment for adolescents with psychosis. Third, assessing the clinical efficacy of a novel VR-assisted CBT interventions for adolescents with psychosis, through a non-randomized single-case study.