2. In a recent study, young adults (18-25 years) were randomly assigned to one of two treatments to increase seat belt use. The intervention group received Safe Vehicle Engagement (SAVE) intervention, a 6-week automated interactive text message program, including weekly seat belt use queries with feedback and goal support to increase seat belt use. The control group received similar queries but no additional feedback. (Inspiration of homework problem: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2796570)