Helping Older Adults Locate 'Lost' Cursors Using FieldMouse
Nic Hollinworth · 2010 · Proceedings of the 12th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2010) · doi:10.1145/1878803.1878889
Summary
This short paper describes FieldMouse, a modified standard optical mouse augmented with a touch sensor (Quantum QT110) embedded in its top surface to detect when a user grasps the mouse after releasing it. The motivation addresses a common problem among older adult computer users: losing track of the mouse cursor on screen. This phenomenon is linked to age-related declines in visual sensitivity, reduced useful field of view, and decreased selective and divided attention. When older users lose the cursor, they typically resort to shaking the mouse from side to side or searching the entire screen — strategies that are time-consuming and frustrating. The FieldMouse detects when the user re-grasps the mouse and triggers one of three cursor-recovery techniques: centering the cursor on screen, wiggling it side to side, or displaying a flashing red ring around it. Importantly, the touch sensor only fires on the initial grasp, so normal mouse operations like clicking and dragging are unaffected.
Key findings
A pilot study with two older adults and one younger volunteer compared the three cursor-recovery techniques in a Fitts's Law-style target selection task. Participants typed three-word phrases (a distractor task requiring them to release the mouse), then had to locate a randomly positioned circular target (46 pixels diameter) on screen. A realistic distractor background using text from Finnegans Wake simulated typical application use. The centering technique was unanimously preferred and fastest — all volunteers noted it was quickest because the cursor was always placed at a known, predictable location (screen center) rather than requiring any visual search. The flashing red ring was counterproductive: one tester reported often seeing the cursor before noticing the ring, making the ring itself a distraction. The wiggling technique was described as time-consuming and unhelpful when actively searching. Based on these results, centering was selected for a planned larger comparative study against Windows' built-in "mouse trails" feature (concentric circles on Control key press).
Relevance
This paper addresses an overlooked but genuine accessibility barrier for older computer users. While much accessibility research focuses on screen readers or motor impairments, losing the mouse cursor is a widespread problem tied to normal age-related visual and cognitive changes. The hardware-based approach of embedding a touch sensor in the mouse is creative, though the centering solution chosen is notably simple — suggesting that sometimes the most effective accessibility intervention is the least complex one. For practitioners, the key insight is that cursor visibility is a real usability issue for aging populations, and that predictability (always knowing where the cursor will appear) outperforms visual enhancement (making the cursor more noticeable). Modern operating systems now include some cursor-finding features, but the design principles identified here — predictable location over visual salience — remain relevant for accessible interface design.
Tags: aging · mouse cursor · pointing devices · input devices · assistive technology · low vision · human-computer interaction · older adults