This video features four personal testimonials with strong emotional appeal, including an adolescent kidney transplant recipient, a pediatric liver transplant recipient, a young adult kidney transplant candidate, and an adolescent whose twin brother was a deceased organ donor. There are minimal facts about transplantation or donation.

This video mirrors common educational campaigns and included segments of HRSA's animated video, Organ Donation and Transplantation: How Does it Work? The IM video presents facts about donation, including the current supply-demand problem in transplantation, common reasons for/against donor designation, donation myths, and the importance of communicating with parents about donation. Information about how to register as a donor is also included. The video contains no personal testimonials.

This video features four personal testimonials with strong emotional appeal, including an adolescent kidney transplant recipient, a pediatric liver transplant recipient, a young adult kidney transplant candidate, and an adolescent whose twin brother was a deceased organ donor. There are minimal facts about transplantation or donation.

The testimonial messaging video intervention will be shown

The primary outcome was donor designation (yes-no) at time of obtaining first driver's license post-intervention. We provided the name, date of birth, last four digits of social security number, residential address, and study identification number of each adolescent to the Massachusetts DoT, which then returned to us a data file containing the donor designation status for each study identification number. For the regionally-matched historical comparison group, the DoT provided a de-identified data file of all adolescents who obtained their first driver's license in the six months prior to study enrollment at six motor vehicle offices.

Immediately before, shortly after, and 1 week following video messaging exposure, adolescents completed a questionnaire to assess the following donation constructs: engagement (2 questions -- 1-10 scale), knowledge (3 questions -- correct/incorrect total score range 0-3), general attitude (1 question), beliefs (4 questions -- strong disagree-strongly agree scale), designation likelihood (1 question -- 1-10 scale), and willingness to communicate donation decision to a parent (1 question -- 1-10 scale). Adolescents received a $5 gift card for each survey completed.