**Brain Stimulation and Decision-making Study Summary** This study looks at how the brain influences decision-making, especially in people with depression. Researchers will use *transcranial magnetic stimulation (TMS)* and *temporal interference (TI)* to understand how specific brain areas, like the cingulate cortex, affect choices. TMS and TI are methods that use magnets or electrical signals to stimulate the brain. Participants will complete game-like tasks while undergoing these stimulations. The study aims to learn about decision-making and cognitive control, which is how our brain manages thoughts and actions. **Key Points:** - The study includes people with depression and healthy individuals. - Participants will perform tasks while receiving brain stimulation. - This research could help understand decision-making in psychiatric conditions. **Eligibility:** - Must be a fluent English speaker, provide consent, and not use drugs. - Exclusions include pregnancy, certain medical conditions, and specific medication use. Participants should not have a history of epilepsy or head injury. This study can provide valuable insights into how the brain works during difficult decisions, which could help in treating depression and other mental health issues.