Additional Study Information: We are doing research to understand more about eating disorders and we are seeking healthy control teenagers ages 13 - 17 without an eating disorder to be in the study. As a participant in our research study, we would (1) interview you and your child about current and past thoughts, feelings, and behaviors, (2) collect brain activity using EEG (non-invasive) while your teen plays some computer games, (3) collect data from your childs smartphone for 6 months through an app called the Effortless Assessment of Risk States (EARS; which would be installed during the initial study visit after you learn more about the study and provide permission), and (4) eating meals in our eating lab. Some procedures are done remotely, and for one day, your teen would come to our lab at the New York State Psychiatric Institute at Columbia University Irving Medical Center. There is also a 6-month follow up assessment. Your teen will be compensated up to $450. To be eligible to participate as a healthy control, your teen must not have a history of an eating disorder.