Cerebellar Stimulation and Cognitive Control

This study is using non-invasive brain stimulation (targeting the cerebellum, the part of the brain at the back of the skull) to investigate how it affects thinking and self-control in people with certain neurological or psychiatric diagnoses. **You may be eligible if...** - You have a clinical diagnosis that the research team has determined makes you eligible for enrollment - You are able to give informed consent **You may NOT be eligible if...** - You have a history of recurrent seizures or epilepsy - You have any other neurological or psychiatric diagnosis beyond the one you are being enrolled for - You have had active substance use disorder in the past 6 months (except tobacco) - You have a pacemaker, heart stent, defibrillator, or neurostimulator device - You are claustrophobic, have uncontrolled high blood pressure, atrial fibrillation, significant heart disease, kidney disease, or are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.