Timeline: A web application for assessing the timing and details of health behaviors

Background: Timeline Followback (TLFB) interview methods are used to assess a variety of health behaviors, including alcohol use, drug use, and sexual behavior. While several online TLFBs have been developed, most focus on single behaviors, and few studies have explored their validity in assessing multiple risk behaviors using a single online TLFB. Objective: To examine the validity of a customizable web application (Timeline) for assessing...