Social Media Apps: A Paradigm for Examining Usability of Mobile Apps for Working-Age Adults with Mild-Moderate Cognitive Disabilities
Morris Huang, Greg McGrew, Cathy Bodine · 2025 · ACM Transactions on Accessible Computing · doi:10.1145/3709144
Summary
This empirical usability study examines how working-age adults (18-65) with mild-to-moderate cognitive disabilities interact with five mainstream social media apps: Facebook, Instagram, Pinterest, Snapchat, and Tumblr. The research addresses a significant gap—while mobile apps offer tremendous potential for people with cognitive disabilities (PwCDs) to reduce social isolation and increase social capital, most usability research has focused on children or older adults with dementia, with very limited attention to working-age adults with intellectual and developmental disabilities (IDD) or brain injury (BI). Nineteen participants (13 with traumatic/acquired brain injury, 6 with IDD including cerebral palsy, autism, and Down syndrome) completed five usability testing sessions across different locations in Colorado. Each participant tested all five apps with 6-8 fundamental tasks per app, such as browsing posts, selecting media to post, creating media, adding captions, and confirming shares. Sessions were video-recorded with synchronized screen capture, hand camera, and face camera for detailed post-hoc analysis. Tasks were scored as complete pass, partial pass (completed with errors but no guiding prompts), or fail (required moderator intervention). Source-of-error analysis was conducted for tasks with >20% failure rates to identify specific UI design issues. Participant preferences were measured using the System Usability Scale (SUS) and After-Scenario Questionnaire (ASQ), along with qualitative debrief interviews.
Key findings
**App-level performance**: Pinterest had the highest task success rate (94%) and SUS score (79.1, "good"), while Snapchat had the lowest success rate (67%) and SUS score (60, "fair"). More than half of the 32 fundamental tasks across all five apps had failure rates of 20% or higher. **Highest-failure task types**: Tasks involving selecting or creating media to post had the highest failure rates (>50% for 4 of 7 highly problematic tasks), consistent with qualitative findings that PwCDs tend toward passive consumption rather than active participation due to task complexity. **Ten key usability issue types identified**: 1. Poor icon design and misleading icons (17 instances across apps) 2. Unclear UI hierarchy/layout (12 instances) 3. Lack of UI element separation and contrast (7 instances) 4. Similar approaches with different outcomes (5 instances) 5. Multi-modal buttons/interactions requiring precision gestures (4 instances) 6. Excessive options (1 instance) 7. Visual clutter (1 instance) 8. Environmental contexts not considered (1 instance) 9. Lack of error prevention (1 instance) 10. System latency (1 instance) **Experience effects**: Novice users rated Snapchat and Instagram as "fair" usability (SUS ~55-60), while experienced users rated them "good" (~79-81). Pinterest showed minimal difference between novice and experienced users, suggesting more intuitive design. The gap between novice and experienced user satisfaction was largest for Snapchat (ASQ task ease: novice 2.7 vs experienced 1.0). **Participant behavior**: Multiple participants reported habitual constrained use—sticking to familiar features and avoiding exploration. One stated: "I always get lost in Pinterest and Instagram, but not Facebook because I only stick to using it for a few things that I have figured out."
Relevance
The study provides 13 evidence-based design recommendations for mobile apps serving PwCDs: 1. **Text label all icons** to clarify function—PwCDs experience higher cognitive load in trial-and-error icon discovery 2. **Ensure icons function as implied** rather than misleading users toward platform agendas 3. **Offer automated onboarding walkthroughs** for first-time/novice users 4. **Avoid placing navigation icons in corners** where peripheral vision issues (common in BI) may cause them to be missed 5. **Increase contrast of essential interactable features** to draw attention 6. **Increase contrast and boundaries between closely placed elements** for easier targeting 7. **Avoid similar task flows leading to different outcomes**—clarify through labeling which outcome users are progressing toward 8. **Reduce intermediary optional steps** or provide clear bypass paths 9. **Avoid multi-modal interactions for essential functions**—if unavoidable, provide visual/auditory feedback and alternative paths 10. **Apply appropriate icon spacing** to reduce visual clutter and limit options per screen 11. **Implement context-aware feedback** (e.g., detect tablet lying flat and prompt user to lift it for camera) 12. **Implement warning indicators** to prevent non-recoverable actions 13. **Ensure timely page/state updates** to avoid user confusion The findings suggest mainstream mobile app heuristics (SMASH, SMART, EUHSA) apply partially but have gaps for PwCDs—notably, the need for explicit icon labeling conflicts with minimalist design principles. For practitioners, the study demonstrates that "active participation" features (posting, creating, sharing) present the highest barriers, potentially limiting the social connection benefits that motivate PwCD social media use.
Tags: cognitive disability · intellectual disability · traumatic brain injury · social media · mobile apps · usability testing · inclusive design · user interface design
Standards referenced: WCAG 2.0