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• Slipping and drifting: using older users to uncover pen-based target acquisition difficulties

  Karyn A. Moffatt, Joanna McGrenere · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  Moffatt and McGrenere present an empirical study at the University of British Columbia investigating the underlying causes of pen-based target acquisition difficulty on a Tablet PC, with explicit attention to how age affects targeting ability. Thirty-six right-handed…

  target acquisition · pen-based interaction · stylus · tablet PC · older adults

• WADER: a novel wayfinding system with deviation recovery for individuals with cognitive impairments

  Shih-Kai Tsai · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 poster paper from Shih-Kai Tsai at Chung Yuan Christian University in Taiwan presents WADER (Wayfinding system with DEviation Recovery), a prototype indoor wayfinding system aimed at individuals with cognitive impairments — explicitly named populations…

  wayfinding · indoor navigation · QR code · cognitive accessibility · cognitive disabilities

• A comparison of area pointing and goal crossing for people with and without motor impairments

  Jacob O. Wobbrock, Krzysztof Z. Gajos · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  Wobbrock and Gajos at the University of Washington present a controlled study comparing two fundamentally different target-acquisition paradigms — conventional area pointing (move into a confined region and click) and goal crossing (sweep the cursor across a goal line, no click…

  target acquisition · goal crossing · area pointing · Fitts' law · steering law

• Information overload in non-visual web transaction: context analysis spells relief

  Jalal Mahmud · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 poster paper from Jalal Mahmud at Stony Brook University describes ongoing PhD research into reducing the information overload that blind users experience when completing multi-step web transactions — shopping, registrations, bill payments — using a screen…

  screen readers · non-visual web access · web page segmentation · context analysis · web transactions

• Comparing speaker-dependent and speaker-adaptive acoustic models for recognizing dysarthric speech

  Frank Rudzicz · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 poster from Frank Rudzicz at the University of Toronto compares two strategies for building automatic speech recognition (ASR) acoustic models that work for people with dysarthria — a set of motor speech disorders that produces speech with high intra- and…

  dysarthria · automatic speech recognition · acoustic model · speaker adaptation · hidden Markov model

• Developing usable CAPTCHAs for blind users

  Jonathan Holman, Jonathan Lazar, Jinjuan Heidi Feng, John D'Arcy · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 poster from a Towson University team led by Jonathan Lazar — joined by Jonathan Holman, Jinjuan Heidi Feng, and John D'Arcy of Notre Dame — addresses the long-standing accessibility problem that text-based CAPTCHAs (the distorted-letter image puzzles used…

  CAPTCHA · audio CAPTCHA · blindness and low vision · screen readers · web accessibility

• Consolidating computer operation and wheelchair control

  Torsten Felzer, Rainer Nordmann · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This short ASSETS 2007 demo proposal from Torsten Felzer and Rainer Nordmann at Darmstadt University of Technology describes the integration of two previously separate assistive systems they had built for people with severe physical disabilities. The first, HaMCoS (HAnds-free…

  hands-free interaction · muscle contraction · electromyography · powered wheelchair · mouse emulation

• 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-to-recruit disabled…

  user simulation · usability evaluation · GOMS · Model Human Processor · scanning interface

• Variable frame rate for low power mobile sign language communication

  Neva Cherniavsky, Anna C. Cavender, Richard E. Ladner, Eve A. Riskin · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07)

  This paper from the University of Washington MobileASL team — Neva Cherniavsky, Anna Cavender, Richard Ladner, and Eve Riskin — addresses a then-emerging problem: enabling Deaf people in the United States to hold real-time American Sign Language conversations over the cellular…

  American Sign Language · sign language · fingerspelling · Deaf community · video phone

• 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 systems (eClass, Lecture…

  lecture capture · note-taking · educational accessibility · academic accommodation · sign language interpreter

• Automated tactile graphics translation: in the field

  Chandrika Jayant, Matt Renzelmann, Dana Wen, Satria Krisnandi, Richard Ladner, Dan Comden · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '07)

  This paper describes two years of field work extending the Tactile Graphics Assistant (TGA), a system developed at the University of Washington to automate the translation of figures from mathematics, science, and engineering (STEM) textbooks into embossed tactile graphics for…

  tactile graphics · Braille · STEM accessibility · blindness and low vision · image processing

• 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 end users encounter. The…

  web accessibility · accessibility metrics · accessibility evaluation · accessibility testing · conformance testing

• Barrier pointing: using physical edges to assist target acquisition on mobile device touch screens

  Jon Froehlich, Jacob O. Wobbrock, Shaun K. Kane · 2007 · Proceedings of the 9th International ACM SIGACCESS Conference on Computers and Accessibility (Assets '07)

  Froehlich, Wobbrock and Kane propose barrier pointing: a set of stylus-based target acquisition techniques that exploit the raised physical edge of a mobile touch screen to stabilise input for users with motor impairments. Standard touch-screen tapping requires a user to fly the…

  mobile accessibility · touchscreen accessibility · motor impairment · target acquisition · input techniques

• 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 that current usability theory,…

  web accessibility · screen readers · voice browser · navigation · usability testing

• Design and Evaluation of an American Sign Language Generator

  Matt Huenerfauth, Liming Zhao, Erdan Gu, Jan Allbeck · 2007 · Proceedings of the Workshop on Embodied Language Processing (EmbodiedNLP 2007)

  Huenerfauth, Zhao, Gu, and Allbeck (2007) describe the implementation and user evaluation of a prototype system for generating animations of American Sign Language (ASL) classifier predicates — spatially complex hand movements that trace the location, motion, shape, or contour…

  ASL · American Sign Language · deaf accessibility · sign language · sign language animation