Simple pen interaction performance of young and older adults using handheld computers
Interacting with Computers
Design lessons for older adult personal health records software from older adults
UAHCI'11 Proceedings of the 6th international conference on Universal access in human-computer interaction: users diversity - Volume Part II
Mobile interface design for low-literacy populations
Proceedings of the 2nd ACM SIGHIT International Health Informatics Symposium
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Medical informatics, broadly defined as the integration of information technology in healthcare, is revolutionizing all aspects of medicine from electronic medical record systems to portable systems that assist clinicians with medical decision-making and data entry. The human-computer interface issues in medical informatics are particularly interesting because there are often diverse user groups with different requirements for the same application (i.e., clinicians and patients). In this dissertation, I present studies that inform the design of the Dietary Intake Monitoring Application (DIMA), a patient-centered application designed to assist dialysis patients in monitoring their dietary needs. Dialysis patients who do not comply with their dietary restrictions run the risk of undergoing additional emergency dialysis, hypertension, pulmonary edema, and death. Currently, patients try to remember their fluid and sodium consumption or record it in a food diary. However, these techniques fail in 80% of dialysis patients. We provide patients with a personal digital assistant application to record their fluid and sodium intake. The varying levels of patient literacy and computing skills present a challenge for the design of DIMA. Furthermore, evaluating DIMA is a challenge because user studies must be conducted in dialysis wards, which are small, stressful, prohibit audio/video recordings, and change rapidly without warning. This dissertation presents methods to make patients more comfortable using DIMA in their everyday lives, a framework for usability studies in non-traditional environments, and interface design guidelines for people with varying literacy skills.