The purpose of this study is to test whether brain stimulation can improve the connections between areas of the brain that are responsible for stopping unhelpful behaviors and improving response inhibition. Response Inhibition is a type of brain function that is involved in stopping unwanted or unhelpful behaviors. This brain function is thought to play a role in OCD compulsions, a type of OCD symptom that involves repeating unhelpful behaviors. We will be using a form of brain stimulation called transcranial magnetic stimulation (TMS) to stimulate the brain and to record the effect this stimulation has on teens' response inhibition. If we can improve these brain connections and the ability to stop unhelpful behaviors, we hope this may improve teens' response inhibition and eventually lead to a new treatment for teens with OCD.