Understanding Design Considerations for Adaptive User Interfaces for Accessible Pointing with Older and Younger Adults
Aqueasha Martin-Hammond, Abdullah Ali, Catherine Hornback, Amy K. Hurst · 2015 · Proceedings of the 12th International Web for All Conference (W4A) · doi:10.1145/2745555.2746645
Summary
This paper investigates how older and younger adults want adaptive user interfaces (AUIs) to detect and respond to pointing difficulties when using computers. Pointing problems — such as misclicks, erratic cursor movements, and difficulty with target acquisition — affect people across age groups due to motor impairments, reduced hand dexterity, fatigue, or age-related changes. While previous research focused on building systems that detect pointing challenges and designing technical adaptations, relatively little work had explored what users themselves actually want from such systems. The researchers conducted participatory design sessions with 38 participants (8 older adults aged 65-84 and 30 younger adults aged 18-34) at the University of Maryland, Baltimore County. Rather than building functional prototypes, they used video scenarios as design probes showing a user experiencing pointing problems while browsing the web, followed by different notification and adaptation approaches. Three notification designs were presented: an abstract indicator (a red bar at the top of the browser), a dialog box (a pop-up requiring acknowledgment), and a browser add-on (showing performance statistics like click accuracy). Participants also evaluated automatic versus manual adaptation approaches. The study used surveys and group discussions after each video to gather feedback on visibility, comprehensibility, intrusiveness, familiarity, and overall preferences for each design.
Key findings
Preferences for notification and adaptation design varied significantly both across and within age groups. Half of the older adults preferred no notification at all, believing they would already know about their pointing difficulties, while most younger adults preferred some form of notification. The abstract indicator was widely disliked for being confusing and too abstract. The dialog box was highly visible but considered too intrusive by most younger participants, and its language was perceived as judgmental. The add-on notification was generally better received for its low intrusiveness and optional nature. Five additional design themes emerged beyond the initial framework: information preferences (users wanted actionable guidance, not just problem identification), language sensitivity (quantitative measures like "70% accuracy" felt like being graded), discreteness (notifications should not broadcast difficulties publicly), trustworthiness (unfamiliar pop-ups triggered suspicion of malware), and empowerment versus privacy trade-offs. No clear preference emerged between manual and automatic adaptations — roughly equal numbers favoured each, with some wanting a hybrid approach. The researchers distilled these findings into three personas: the "Do-It-Yourselfer" who wants control and manual adaptations, the "Inquirer/Investigator" who wants notifications or adaptations but not both, and the "Commander/Follower" who welcomes full automatic assistance.
Relevance
This research provides essential user-centred evidence for anyone designing adaptive or assistive pointing technologies. The finding that users have fundamentally different attitudes toward automated assistance — captured in the three personas — argues strongly against one-size-fits-all approaches to accessibility adaptations. Practitioners building adaptive interfaces should note that language choices matter enormously: presenting performance data as grades or evaluations can cause rejection of otherwise helpful tools. The privacy and trust concerns raised by participants are particularly relevant today as AI-driven accessibility tools become more common. The study also challenges assumptions about older adults, showing that many prefer to maintain control rather than receive automated help. For organizations implementing pointing accommodations, these findings suggest offering multiple levels of user control and ensuring notifications are discrete, comprehensible, and non-judgmental.
Tags: adaptive user interfaces · pointing performance · older adults · participatory design · motor impairment · assistive technology · user preferences