Previous research has found that when portion sizes double, people eat on average 35 percent more. Now a new study suggests that this may be beneficial when it comes to healthy foods. Researchers from Deakin University gave 135 university students large or small portions of apple chips or potato chips. As expected, those who had larger portions ate more, even for those with the healthy snack. Researchers say that this could come in handy when trying to encourage healthier eating habits, such as beginning a meal with a large portion of healthy food before serving a smaller portion of less heathy food.