Fast Food Feeding in Youth

Using a three-period crossover design, the investigators will evaluate three acute feeding conditions. * Under Condition A, the total amount of food in a large fast food meal will be delivered on a single tray at Time 0 (start of meal). * Under Condition B, the same fast food meal will be equally divided among 4 separate portions, with all portions delivered at Time 0. * Under Condition C, the meal again will be equally divided among 4 separate portions, but the portions will be delivered at 15-minute time intervals (Time 0, 15 minutes, 30 minutes, 45 minutes).