Learning Objective 1: describe how numerical literacy was incorporated in the design of an electronic self-monitoring device.
Learning Objective 2: describe methods used to merge visual literacy skills into the design of an electronic self-monitoring device.
Methods: We used a participatory design approach with 40 individuals who were receiving out-patient hemodialysis therapy at an urban, inner-city facility. Participants were middle-aged and 85% were African American.
Results: Numerical literacy skills were integrated by the computation of real-time totals. Real-time, 24-hour totals allow individuals to see their intake relative to their dietary prescription for six main categories. Visual literacy skills were considered in design in two major ways. First, a graphical interface was designed to convey intake data over a 24-hour period that could be accurately interpreted by patients. Participants selected the graphical display they found easiest to interpret. Second, labels for the feedback graphs are displayed pictorially using objects easily understood by the patient group.
Conclusion: The interface has been completed and a pilot study is currently in progress to obtain usability, feasibility, and preliminary efficacy information.