Online Learning System to Help People with Developmental Disabilities Reinforce Basic Skills
Lourdes M. Morales-Villaverde, Karina Caro, Taylor Gotfrid, Sri Kurniawan · 2016 · Proceedings of the 18th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '16) · doi:10.1145/2982142.2982174
Summary
This paper presents the development and evaluation of an HTML5-based web application for iPad designed to help people with developmental disabilities (DD) of all ages reinforce basic skills such as recognizing numbers, letters, money, shapes, and colors. The system was developed in collaboration with Imagine! and Hope Services, two non-profit organizations providing care to people with DD. A key motivation was that existing educational apps targeting these skills are designed for young children, featuring busy screens with bright colors, animations, and loud sounds that are both distracting and age-inappropriate for adults with DD. The system includes seven activities: Money, Money Addition, Numbers, Lowercase Letters, Uppercase Letters, Shapes, and Colors. Activities present prompts (e.g., "touch number 8") and users respond by tapping options on a grid. The design emphasizes simplicity, avoiding unnecessary distractions while using high-contrast, colorblind-friendly colors (yellow highlights on black backgrounds), large fonts and touch targets, and real photographs of U.S. currency instead of drawings. The system employs a scaffolded error-correction approach: users get three attempts with progressively more direct hints (highlighting the correct answer, removing incorrect options, then showing only the correct answer), and are never given negative feedback. Positive reinforcers include audio praise ("Good Job!") and images of things users enjoy (e.g., their favorite sports team). The system requirements were gathered through iterative focus groups with DD service organization staff, personas, storyboards, and low-fidelity prototyping.
Key findings
Ten participants with DD (ages 23-36, including individuals with cerebral palsy, autism, Down syndrome, Inverted X Syndrome, and mild intellectual disability) completed a comprehensive user study at Hope Services. Across all seven activities, on average 80.4% or more of participants' reactions were positive. All participants found the activities easy, fun, helpful, and expressed they would use them again. Most participants completed activities independently with little to no assistance — only one participant (P2) consistently needed researcher help. The touchscreen interface was preferred over paper-based equivalents because tapping is easier than writing answers. A significant technical issue was "multiple presses" (MP) — participants needing to tap options multiple times before the system registered input — which occurred across nearly all activities and participants (averaging 6-12 instances per activity). Despite this, 65% of participants said MP instances were not frustrating. The Money Addition activity was most challenging, requiring the most researcher assistance (four out of nine participants), but participants who initially found it difficult reported it became easier across sessions. The positive and learning reinforcers were well-received by participants, with most expressing they liked both types. One collaborating organization reported that some clients were still using the system at least four weeks after the study ended.
Relevance
This research addresses a significant gap in accessible educational technology: the absence of age-appropriate digital learning tools for adults with developmental disabilities. While numerous apps exist for teaching basic skills to children, their design choices (childish aesthetics, overwhelming stimulation) make them inappropriate and potentially demeaning for adult learners. For accessibility practitioners, the study provides concrete design guidelines for DD-accessible applications: simplistic and clear interfaces, high-contrast colorblind-friendly palettes, large touch targets with tap-only input (no dragging or swiping), scaffolded error correction without negative feedback, and culturally relevant positive reinforcers. The finding that participants preferred touchscreen activities over paper-based equivalents reinforces the potential of tablet-based learning for this population. The persistent MP (multiple press) issue highlights how input reliability is critical for users who may not distinguish between a system failure to register input and their own error — a design consideration often overlooked in mainstream development. The collaborative development model with care organizations ensures that technology meets real-world service delivery needs rather than researcher assumptions.
Tags: developmental disability · intellectual disability · educational technology · cognitive accessibility · iPad · web application · participatory design · inclusive design