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Capturing Usability Problems for People Living With Dementia by Applying the DEMIGNED Principles in Usability
Thomas Engelsma1,2,3, Simone Heijmink1, Heleen M A Hendriksen4,5
1eHealth Living & Learning Lab Amsterdam, Department of Medical Informatics, Amsterdam UMC, location University of Amsterdam, Amsterdam, Netherlands.
JMIR Human Factors
|July 31, 2024
Summary
The DEMIGNED principles effectively identified 79.6% of usability issues in a mobile website for memory clinic patients. This approach helps improve digital health accessibility for individuals with cognitive decline, reducing digital health inequities.
Area of Science:
- Digital Health
- Human-Computer Interaction
- Gerontology
Background:
- Dementia-related impairments create significant barriers to accessing and using digital health technologies (DHTs), exacerbating digital health inequities.
- The DEMIGNED principles, derived from literature, offer guidance for designing and evaluating DHTs tailored to individuals with cognitive decline.
- This population, including those with subjective cognitive decline (SCD), mild cognitive impairment (MCI), and dementia, is rapidly growing.
Purpose of the Study:
- To apply DEMIGNED principles within usability evaluation methods for a mobile website serving memory clinic patients.
- To identify usability problems encountered by individuals with SCD, MCI, or dementia on this mobile website.
- To assess the validity of usability problems identified by DEMIGNED principles during expert testing of mobile DHTs.
Main Methods:
- A heuristic evaluation was performed using DEMIGNED principles as domain-specific guidelines, involving 3 double experts and 2 usability engineering experts.
- Think-aloud sessions were conducted with 7 patients from a memory clinic, including individuals with SCD, MCI, and dementia.
- Usability problems identified during heuristic evaluation were compared against those encountered during patient think-aloud sessions.
Main Results:
- Heuristic evaluation identified 36 unique usability problems.
- Think-aloud sessions with 7 patients revealed 181 usability problem encounters, mapping to 144 (79.6%) of the heuristically identified problems.
- An additional 10 unique usability problems were identified through user testing, with common issues including search functionality, content organization, scrolling, information overload, and unclear feedback.
Conclusions:
- Applying DEMIGNED principles in expert testing successfully captured a significant majority (79.6%) of usability problem encounters during user testing of a mobile website for memory clinic patients.
- The study demonstrated that 50% of unique usability problems identified through heuristic evaluation were also observed in user testing.
- Further research is recommended to explore the applicability of DEMIGNED principles to other DHT functionalities to enhance digital health accessibility and reduce inequities for this demographic.
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