RCT Comparing Avatar Intervention to Supportive Intervention to Reduce Cannabis Use in Patients With Psychotic Disorders

This study is comparing two types of therapy to reduce cannabis use in patients with psychotic disorders (like schizophrenia or bipolar disorder with psychosis) who also have a cannabis use disorder. One approach uses a virtual reality 'avatar' interaction, while the other uses standard supportive counseling. **You may be eligible if...** - You are 18 or older - You have been diagnosed with schizophrenia, schizoaffective disorder, or bipolar disorder with psychotic symptoms - You meet criteria for moderate-to-severe cannabis use disorder (at least 4 DSM-5 criteria) **You may NOT be eligible if...** - You have a current addiction to a substance other than cannabis - You are already in treatment specifically for cannabis use - You are currently going through cannabis withdrawal treatment - You have a neurological disorder - You have severe unstable physical illness - You cannot give informed consent Talk to your doctor to see if this trial is right for you.