was programmed using the Research Electronic Data Capture system (Harris, Thielke, Taylor, Gonzalez, & Conde, 2009), contained an introduction and checkbox for the participant to indicate that he or she was 18 years old or older and that they agreed to participate in the survey. The introduction stated that the survey concerned the extent to which people had experienced stressful life events and how being exposed to those events affected them. They were told that it was important for people to participate whether or not they had experienced stressful events and whether or not the events had affected them. The survey was anonymous, and study procedures were approved by the Medical University of South Carolina Institutional Review Board. Participants who completed the survey received points worth approximately $3 and were entered into a raffle with a prize equivalent to $25,000 held every 3 months for which participants completing all types of Survey Sampling International surveys were eligible. According to the 2010 U.S. Census, 19.8% of U.S. households currently lack home-Internet access, but some individuals from these households have Internet access through smartphones. Therefore, although this sampling method does not yield a true national probability sample, it provides a diverse nonconvenience
