Accessibility Approach to Adopting Web Technologies
Neil King, Damien McCormack · 2011 · Proceedings of the International Cross-Disciplinary Conference on Web Accessibility (W4A) · doi:10.1145/1969289.1969327
Summary
This paper presents findings from a comprehensive Australian Government-commissioned study by Vision Australia into the accessibility of the PDF format for people with disabilities. The three-phase research combined user consultation (focus groups with blind and low vision users), technical evaluation of assistive technology support for PDF, and user experience testing with 23 participants across a range of disabilities (10 blind, 1 deafblind, 5 low vision, 3 mobility, 1 hearing, 3 cognitive). The study was commissioned by the Australian Government Information Management Office (AGIMO) to review the government's existing policy that PDF should not be the sole means of conveying information — a position held by the Australian Human Rights Commission based on anecdotal evidence of poor accessibility. The research found that the problems users experience with PDF are not inherent to the format itself, but stem from three interacting factors: inaccessible document design (51% of issues), insufficient assistive technology support (28%), and lack of user skill (16%). The authors frame the PDF findings as representative of the challenges any new web technology (AJAX, HTML5, Web 2.0) will face in becoming accessible, and propose five government policy recommendations applicable to technology adoption broadly.
Key findings
Screen reader users faced by far the greatest barriers: their overall task success rate was just 66% compared to 97% for all other disability groups combined. When using PDF documents optimized for accessibility, blind participants' task completion jumped dramatically from 26% to 79%, demonstrating the critical impact of document design. The technical evaluation categorized assistive technologies into three tiers: Sufficient (33%) — JAWS, ZoomText, and Magic; Partially Sufficient (44%) — NVDA, SATOGO, Window Eyes, and PacMate; Not Sufficient (23%) — VoiceOver and BrailleNote. Crucially, the ATs providing sufficient PDF support were also the most expensive (JAWS at AU$1,500, ZoomText at AU$730), while free/low-cost alternatives like NVDA failed to provide adequate support. With 63% unemployment among blind/low vision Australians, and AT funding limited to those entering or maintaining employment, cost creates a significant access barrier. AT vendors admitted they were not always aware of the issues and prioritized development for emerging web technologies over PDF support. User consultations revealed that most blind/low vision users actively avoid PDF files altogether due to negative past experiences.
Relevance
This study provides an important evidence base for a question organizations still grapple with: can PDF be used accessibly for government and organizational communications? The finding that problems lie not in the format but in the ecosystem — document creation practices, AT support, and user training — remains directly applicable today. The three-factor framework (document design, AT capability, user skill) is a useful model for evaluating any technology's accessibility readiness. The stark task completion gap between optimized (79%) and typical (26%) PDFs for screen reader users powerfully demonstrates that accessible authoring practices matter more than format choice. The five policy recommendations — collect AT usage data, fund AT access, incentivize AT development, educate document creators, and fund user training — represent a comprehensive government accessibility strategy that few countries have fully implemented. The economic access barrier (expensive ATs providing better support) raises equity concerns that persist in the assistive technology market.
Tags: PDF accessibility · assistive technology · blind and low vision · screen readers · document accessibility · government accessibility · user testing · accessibility policy
Standards referenced: WCAG 2.0