Abstract: Using a Participatory Design approach, we developed the iManage (My Hearing) program, an internet-based decision coaching guide designed to encourage adults (45-85) who fail a hearing screen to seek audiology care. iManage provides users with tailored information through the completion of three modules: 1) Is my hearing loss important? 2) A communication partner’s point of view 3) Benefits and drawbacks of seeking audiology care. As our target audience includes older adults, we designed iManage be easy to use for people with only fair computer skills. This poster describes the usability testing results to evaluate and improve program design, thereby increasing the probability of program adoption, adherence and completion (1). Our findings will help others in the development of internet-based material for older adults with hearing loss. Usability testing is an iterative process in which we made changes to the program following each session and presented the revised program to the next participant. We tested 10 participants ages 58-81 with self-reported good and fair computer skills. We used the “Think Aloud Technique” (1) to identify problems which were assigned to one of three categories: user driven, researcher driven, or device driven. We measured usability with the System Usability Scale (2). We expected to see a steady decrease in usability problems over time. Instead, we found that addressing problems from one participant often uncovered new problems for subsequent participants. We also predicted that participants with good computer skills would report fewer problems than those with fair skills. However, on average participants with good computer skills reported more problems, specifically user driven problems, and more researcher driven problems were identified with users with fair computer skills. Even after utilizing best practices in the design of websites for older adults, usability testing exposed problems that we had not anticipated. 1. Or, C., & Tao, D. (2012). Usability Study of a Computer-Based Self-Management System for Older Adults with Chronic Diseases. JMIR Research Protocols, 1(2). 2. Brooke, J. (1996). SUS: a “quick and dirty” usability scale. In P. W. Jordan, B. Thomas, B. A. Weerdmeester, & I. L. McClelland (Eds.), Usability Evaluation in Industry (pp. 189-194). London: Taylor and Francis. Contact email: keira.glasheen@lousiville.edu Available May 3-5