Evaluating a Pen-based Computer Interface for Novice Older Users
Dante Arias Torres · 2006 · Proceedings of the 8th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '06) · doi:10.1145/1168987.1169039
Summary
This short paper from the University of Oaxaca in Mexico proposes and evaluates a simplified pen-based gesture interface designed for novice older computer users who struggle with the traditional WIMP (Windows, Icons, Menus, and Pointers) paradigm. The author argues that existing accessibility efforts for older adults have focused on application-level modifications (simplified browsers, email clients) and basic OS accessibility features, but have not addressed the fundamental difficulty that older novice users face with mouse-based interaction at the operating system level. The proposed interface uses just six simple line-drawing gestures on a Wacom pen tablet to execute common operations: open, close, copy, paste, cut, and undo/delete. These gestures trigger context-sensitive menus based on the current application, eliminating the need for complex mouse operations and keyboard shortcuts. A prototype was built using EPL (Easy Programming Language) and Strokeit gesture recognition software.
Key findings
A usability study was conducted with 30 novice older users aged 60 to 83 (mean age approximately 65) at UABJO in Mexico, randomly assigned to pen-based or mouse-based groups. Participants had low formal education (mean 6 years), distinguishing this study from prior research that typically recruited more educated older adults. Using the System Usability Scale (SUS), the pen-based interface scored 52 compared to 35 for the traditional mouse-based interface. While neither score indicates good usability by standard SUS benchmarks, the pen-based approach showed a meaningful advantage. The results suggest that older people prefer and find more usable a pen-based gesture interface over a conventional mouse interface. However, the author acknowledges that the small sample size prevents drawing strong conclusions, and calls for larger-scale validation studies.
Relevance
This paper addresses an important but often overlooked accessibility gap: the WIMP interface paradigm itself can be a barrier for older adults who are new to computing. While much accessibility work focuses on adapting content or adding assistive features within existing interfaces, this research questions whether the fundamental interaction model needs rethinking for certain populations. The finding that even simple pen gestures outperformed mouse interaction for novice older users with limited education is relevant to accessibility practitioners working on digital inclusion in aging populations and in regions with lower technology literacy. Although pen tablets are less common today, the underlying principle — that simpler gesture-based interactions may be more accessible than traditional point-and-click interfaces — extends to modern touchscreen devices and has implications for how we design technology for first-time users of any age.
Tags: older adults · pen input · gesture input · alternative input · usability · WIMP · age-related accessibility · novice users