Test of Target Engagement of Ambiguity Aversion

This study is investigating how the brain processes uncertainty and ambiguity — and how that relates to decision-making and anxiety. Participants will undergo brain scans (MRI) and complete tasks designed to measure how they respond to uncertain situations. This research aims to improve our understanding of mental health conditions linked to intolerance of uncertainty. **You may be eligible if...** - You are between 25 and 60 years old - You are right-handed - You can read and write in English - You score in the higher range on a questionnaire measuring discomfort with uncertainty (31st percentile or above) **You may NOT be eligible if...** - You have a personal history of psychosis, mania, or hypomania - You have been diagnosed with autism spectrum disorder - Your IQ is below 80 - You have had a significant head injury with loss of consciousness over 2 minutes - You have a neurological condition (such as epilepsy, Parkinson's disease, or history of stroke) - You are currently pregnant - You have an implanted electrical device (like a pacemaker or spinal stimulator) Talk to your doctor to see if this trial is right for you.