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• Audio-Based Feedback Techniques for Teaching Touchscreen Gestures

  Uran Oh, Stacy Branham, Leah Findlater, Shaun K. Kane · 2015 · ACM Transactions on Accessible Computing (TACCESS)

  This paper proposes and evaluates two complementary audio-based techniques for teaching touchscreen gestures to blind and low-vision users: gesture sonification (mapping finger position to pitch and stereo panning to create an audio representation of the gesture) and corrective…

  visual impairment · touchscreen · gesture learning · sonification · audio feedback

• Evaluating Intelligibility and Battery Drain of Mobile Sign Language Video Transmitted at Low Frame Rates and Bit Rates

  Jessica J. Tran, Eve A. Riskin, Richard E. Ladner, Jacob O. Wobbrock · 2015 · ACM Transactions on Accessible Computing (TACCESS)

  This paper investigates the lower limits of intelligible sign language video on mobile devices, seeking to determine the minimum frame rate and bit rate that still allow deaf users to understand ASL video conversations. Mobile video communication is essential for deaf and…

  deaf and hard of hearing · sign language · video communication · mobile accessibility · bandwidth

• HoliBraille: Multipoint Vibrotactile Feedback on Mobile Devices

  Hugo Nicolau, Kyle Montague, Tiago Guerreiro, André Rodrigues, Vicki L. Hanson · 2015 · Proceedings of the 12th International Web for All Conference (W4A)

  This paper introduces HoliBraille, a hardware prototype that enables both Braille input and output on standard mobile touchscreen devices using vibrotactile motors. The system attaches six small vibration motors to a 3D-printed case that fits over a smartphone, with each motor…

  braille · blind and low vision · haptic technology · mobile accessibility · vibrotactile feedback

• Just-in-Time Cognitive Assessment and Task Recommendation for Individuals with Cognitive Impairments

  Sean-Ryan Smith · 2015 · Proceedings of the 12th International Web for All Conference (W4A)

  This doctoral consortium paper proposes a mobile system that performs just-in-time cognitive assessment for people with cognitive impairments (CI), then uses those assessment results to recommend tasks the individual is most likely to be able to perform independently. The core…

  cognitive impairment · cognitive assessment · cognitive rehabilitation · assistive technology · mobile accessibility

• A4TV: Assessing and Ameliorating the Accessibility of the Ascending Connected TV Platforms

  Daniel Costa · 2015 · Proceedings of the 12th International Web for All Conference (W4A)

  This doctoral consortium paper proposes a two-stage research programme to study and improve the accessibility of connected TV platforms for visually impaired users. Connected TVs — smart TVs and set-top boxes with internet connectivity — use web technologies (HTML5, JavaScript)…

  connected TV · blindness · visual impairment · accessibility evaluation · multimodal interaction

• Optimus Web: Selective Delivery of Desktop or Mobile Web Pages

  Nádia Fernandes, Tiago Guerreiro, Diogo Marques, Luís Carriço · 2015 · Proceedings of the 12th International Web for All Conference (W4A)

  This paper presents Optimus Web, a client-side web proxy system that automatically selects and delivers the most accessible version of a website — either its desktop or mobile representation — to blind users. The system uses QualWeb, an automated accessibility evaluator that…

  web accessibility · blind users · screen readers · mobile accessibility · automated testing

• Enhancing Android Accessibility for Users with Hand Tremor by Reducing Fine Pointing and Steady Tapping

  Yu Zhong, Astrid Weber, Casey Burkhardt, Phil Weaver, Jeffrey P. Bigham · 2015 · Proceedings of the 12th International Web for All Conference (W4A)

  This paper introduces Touch Guard, a system-wide Android accessibility service developed as a Google intern research project that helps users with hand tremor interact more accurately with touchscreen devices. The core problem addressed is that conventional touchscreen…

  mobile accessibility · touchscreen accessibility · hand tremor · motor impairment · Android

• Breaking Barriers with Assistive Macros

  André Rodrigues · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility

  This paper introduces Assistive Macros, an Android accessibility service that enables users with motor impairments to perform multi-step interactions with a single selection. The system addresses two critical problems: the extreme time consumption of sequential scanning…

  switch access · motor impairment · mobile accessibility · Android · macros

• Typing Performance of Blind Users: An Analysis of Touch Behaviors, Learning Effect, and In-Situ Usage

  Hugo Nicolau, Kyle Montague, Tiago Guerreiro, André Rodrigues, Vicki L. Hanson · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility

  This longitudinal study provides the most detailed analysis to date of how novice blind users learn to type on touchscreen keyboards using the Explore by Touch paradigm (where users slide fingers across the screen to hear key names, then lift to select). Five legally blind…

  visual impairment · touchscreen · text entry · mobile accessibility · screen reader

• A System for Controlling Assisted Living Environments Using Mobile Devices

  Paulo A. Condado, Fernando G. Lobo · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility

  This paper presents EasyHouse, a smartphone-based home automation system designed to be accessible for people with motor disabilities while remaining usable by all family members. The system addresses a gap in the smart home market: most domotic (home automation) products target…

  home automation · smart home · motor disabilities · cerebral palsy · mobile accessibility

• Accessible Mobile Biometrics for Elderly

  Ramon Blanco-Gonzalo, Raul Sanchez-Reillo, Loïc Martínez-Normand, Belen Fernandez-Saavedra, Judith Liu-Jimenez · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility

  This paper presents one of the first accessibility evaluations of mobile biometric authentication, focusing on elderly users making Point of Sale payments via smartphone. The researchers developed an Android app using NFC communication and two biometric modalities—fingerprint…

  biometrics · elderly · mobile accessibility · authentication · fingerprint

• Getting Smartphones to Talkback: Understanding the Smartphone Adoption Process of Blind Users

  André Rodrigues, Kyle Montague, Hugo Nicolau, Tiago Guerreiro · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility

  This paper presents an eight-week longitudinal study investigating how novice blind users adopt touchscreen smartphones, transitioning from traditional feature phones. The researchers recruited five legally blind participants (ages 23-55) who had never used a touchscreen…

  blindness · screen readers · mobile accessibility · TalkBack · smartphone adoption

• A Performance Comparison of On-Hand versus On-Phone Nonvisual Input by Blind and Sighted Users

  Uran Oh, Leah Findlater · 2015 · ACM Transactions on Accessible Computing (TACCESS)

  This study investigates whether using one's own hand as an input surface offers performance advantages over touchscreen phones for blind users performing nonvisual interaction. On-body input is particularly attractive for blind users because it provides enhanced tactile and…

  on-body interaction · mobile accessibility · blindness · touchscreen accessibility · gesture input

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