Context Identifying effective obesity treatment is both a clinical challenge and a public health
priority due to the health consequences of obesity. Objective To determine whether common
decision errors identified by behavioral economists such as prospect theory, loss aversion,
and regret could be used to design an effective weight loss intervention. Design, Setting,
and Participants Fifty-seven healthy participants aged 30-70 years with a body mass index
of 30-40 were randomized to 3 weight loss plans: monthly weigh-ins, a lottery incentive …