Additional Study Information: We are doing research to understand more about restrictive eating and binge eating in teenagers ages 13 17. 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. Teens who are interested and eligible may receive eating disorder treatment at no cost. Your teen will be compensated up to $450. To be eligible for the study, your teen must have experienced restrictive eating or binge eating.