Efficacy of Hi-tACS for Schizophrenia Negative Symptoms

This study tests a brain stimulation technique called Hi-tACS (high-intensity transcranial alternating current stimulation) — a non-invasive method using mild electrical currents applied to the scalp — to reduce "negative symptoms" of schizophrenia. Negative symptoms include things like reduced motivation, flat emotions, and social withdrawal, which are hard to treat with medications. **You may be eligible if...** - You are 18 or older and of Han Chinese ethnicity - You have a confirmed diagnosis of schizophrenia - You have residual negative symptoms despite medication - You have been on stable antipsychotic medication with no dose changes recently - You completed at least 6 years of schooling and can fill out questionnaires independently **You may NOT be eligible if...** - You have a history of seizures or epilepsy - You have metal implants in your head or a pacemaker - Your medications have changed recently - You have other major psychiatric or neurological conditions Talk to your doctor to see if this trial is right for you.