Literature Reviews

Reviewed research papers, articles, and publications relevant to digital accessibility.

• Judge: Effective State Abstraction for Guiding Automated Web GUI Testing

  Chenxu Liu, Junheng Wang, Wei Yang, Ying Zhang, Tao Xie (2026) — ACM Transactions on Software Engineering and Methodology

  This paper presents Judge, a novel approach to state abstraction for automated web GUI testing (AWGT). AWGTs explore web applications by performing GUI actions and building a state model to guide further exploration, maximising code coverage within a…

  • automated testing
  • web accessibility
  • GUI testing
  • DOM
  • machine learning
  • contrastive learning
  • state abstraction
  • accessibility evaluation

• OPTIMAL-EM: Complexity-Driven Clustering for Optimised Web Accessibility Evaluation

  Alexander Hambley, Yeliz Yesilada, Markel Vigo, Simon Harper (2026) — ACM Transactions on the Web, Vol. 20, No. 2

  Hambley, Yesilada, Vigo, and Harper (University of Manchester and METU-NCC) extend their OPTIMAL-EM methodology for large-scale web accessibility conformance evaluation. The problem they address is fundamental to professional auditing: the W3C's Webs…

  • web accessibility
  • accessibility evaluation
  • WCAG-EM
  • OPTIMAL-EM
  • representative sampling
  • web page complexity
  • clustering
  • DBSCAN
  • t-SNE
  • machine learning
  • audit methodology
  • automated testing

• Ability Heuristics for Conducting Accessibility Inspections

  Claire L. Mitchell, Junhan Kong, Jesse J. Martinez, Shaun K. Kane, Amy J. Ko, Alexis Hiniker, Jacob O. Wobbrock (2026) — Proceedings of the 2026 CHI Conference on Human Factors in Computing Systems (CHI '26)

  Mitchell and colleagues develop and evaluate a set of nine 'ability heuristics' intended to let designers and developers — not just accessibility specialists — inspect interactive technology for accessibility problems. The authors argue that existing…

  • heuristic evaluation
  • ability-based design
  • accessibility inspection
  • accessibility evaluation
  • design methods
  • inspection methods
  • accessibility quality
  • design education

• Proposing New Metrics to Evaluate Web Usability for the Blind

  Kentarou Fukuda, Shin Saito, Hironobu Takagi, Chieko Asakawa (2005) — CHI '05 Extended Abstracts on Human Factors in Computing Systems

  This four-page CHI '05 extended abstract argues that existing automated accessibility checkers — in 2005 typified by Bobby — had plateaued: they verified the presence of ALT attributes, labels, and markup conformance, yet real blind users still found…

  • web accessibility
  • accessibility evaluation
  • accessibility metrics
  • screen readers
  • voice browser
  • blindness and low vision
  • automated accessibility
  • alt text
  • accessibility testing

• Analysis of Navigability of Web Applications for Improving Blind Usability

  Hironobu Takagi, Shin Saito, Kentarou Fukuda, Chieko Asakawa (2007) — ACM Transactions on Computer-Human Interaction (TOCHI), Vol. 14, No. 3, Article 13

  This TOCHI article is a two-study investigation into why modern web applications — especially visually dense online shopping sites — remain slow and frustrating for blind users even when they pass automated accessibility checks. The authors argue tha…

  • web accessibility
  • screen readers
  • voice browser
  • navigation
  • usability testing
  • blindness and low vision
  • accessibility evaluation
  • assistive technology
  • accessibility research

• SAMBA: a semi-automatic method for measuring barriers of accessibility

  Giorgio Brajnik, Raffaella Lomuscio (2007) — Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '07)

  Brajnik and Lomuscio argue that web accessibility cannot be managed without being measured, yet existing accessibility metrics are underdeveloped and almost universally tied to conformance with WCAG checkpoints rather than to the real-world barriers …

  • web accessibility
  • accessibility metrics
  • accessibility evaluation
  • accessibility testing
  • conformance testing
  • barrier walkthrough
  • expert review
  • automated testing
  • quality assurance

• Photonote evaluation: aiding students with disabilities in a lecture environment

  Gregory Hughes, Peter Robinson (2007) — Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  Hughes and Robinson at the Cambridge Computer Laboratory present Photonote, a lecture-capture system designed specifically for students with disabilities, and a controlled user study comparing it to human note-takers. Where existing lecture-capture s…

  • lecture capture
  • note-taking
  • educational accessibility
  • academic accommodation
  • sign language interpreter
  • American Sign Language
  • computer vision
  • image enhancement
  • deaf and hard of hearing
  • visual impairment
  • learning disabilities
  • mobility
  • higher education
  • accessibility evaluation

• Simulation to predict performance of assistive interfaces

  Pradipta Biswas, Peter Robinson (2007) — Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 poster from Pradipta Biswas and Peter Robinson at the Cambridge Computer Laboratory describes a simulator for predicting how disabled users will perform on a given assistive interface, intended to reduce the dependence on hard-…

  • user simulation
  • usability evaluation
  • GOMS
  • Model Human Processor
  • scanning interface
  • switch access
  • motor accessibility
  • human-computer interaction
  • cognitive modelling
  • assistive technology
  • accessibility evaluation

• SADIe: exposing implicit information to improve accessibility

  Darren Lunn (2007) — Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '07)

  Darren Lunn's Assets '07 demonstration paper introduces SADIe (Structural-Semantics for Accessibility and Device Independence), a transcoding system from the University of Manchester that uses Semantic Web ontologies to expose the implicit visual str…

  • web accessibility
  • transcoding
  • semantic web
  • ontology
  • CSS
  • screen readers
  • visual impairment
  • accessibility evaluation
  • randomisation test
  • single-subject design

• Effects of sampling methods on web accessibility evaluations

  Giorgio Brajnik, Andrea Mulas, Claudia Pitton (2007) — Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '07)

  Brajnik, Mulas, and Pitton's Assets '07 paper is a large, careful empirical investigation of the sampling step in web-accessibility evaluation — the step at which an evaluator picks which pages of a site to actually test. For any site above a trivial…

  • web accessibility
  • accessibility evaluation
  • sampling methods
  • accessibility metrics
  • conformance testing
  • automated testing
  • WCAG
  • quality assurance
  • research methodology
  • accessibility audit