Upcoming Courses

go to course
User-Centred Design - Module 3
71% booked. Starts in 24 days
 
 

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !

 
 

Our Latest Books

 
 
The Social Design of Technical Systems: Building technologies for communities. 2nd Edition
by Brian Whitworth and Adnan Ahmad
start reading
 
 
 
 
Gamification at Work: Designing Engaging Business Software
by Janaki Mythily Kumar and Mario Herger
start reading
 
 
 
 
The Social Design of Technical Systems: Building technologies for communities
by Brian Whitworth and Adnan Ahmad
start reading
 
 
 
 
The Encyclopedia of Human-Computer Interaction, 2nd Ed.
by Mads Soegaard and Rikke Friis Dam
start reading
 
 

Jacob Wobbrock

Add description
Rename / change spelling
Add publication
 

Publications by Jacob Wobbrock (bibliography)

 what's this?
2012
 
Edit | Del

Azenkot, Shiri, Rector, Kyle, Ladner, Richard and Wobbrock, Jacob (2012): PassChords: secure multi-touch authentication for blind people. In: Fourteenth Annual ACM SIGACCESS Conference on Assistive Technologies 2012. pp. 159-166.

Blind mobile device users face security risks such as inaccessible authentication methods, and aural and visual eavesdropping. We interviewed 13 blind smartphone users and found that most participants were unaware of or not concerned about potential security threats. Not a single participant used optional authentication methods such as a password-protected screen lock. We addressed the high risk of unauthorized user access by developing PassChords, a non-visual authentication method for touch surfaces that is robust to aural and visual eavesdropping. A user enters a PassChord by tapping several times on a touch surface with one or more fingers. The set of fingers used in each tap defines the password. We give preliminary evidence that a four-tap PassChord has about the same entropy, a measure of password strength, as a four-digit personal identification number (PIN) used in the iPhone's Passcode Lock. We conducted a study with 16 blind participants that showed that PassChords were nearly three times as fast as iPhone's Passcode Lock with VoiceOver, suggesting that PassChords are a viable accessible authentication method for touch screens.

© All rights reserved Azenkot et al. and/or ACM Press

 
Edit | Del

Goel, Mayank, Wobbrock, Jacob and Patel, Shwetak (2012): GripSense: using built-in sensors to detect hand posture and pressure on commodity mobile phones. In: Proceedings of the 2012 ACM Symposium on User Interface Software and Technology 2012. pp. 545-554.

We introduce GripSense, a system that leverages mobile device touchscreens and their built-in inertial sensors and vibration motor to infer hand postures including one- or two-handed interaction, use of thumb or index finger, or use on a table. GripSense also senses the amount of pres-sure a user exerts on the touchscreen despite a lack of direct pressure sensors by inferring from gyroscope readings when the vibration motor is "pulsed." In a controlled study with 10 participants, GripSense accurately differentiated device usage on a table vs. in hand with 99.67% accuracy and when in hand, it inferred hand postures with 84.26% accuracy. In addition, GripSense distinguished three levels of pressure with 95.1% accuracy. A usability analysis of GripSense was conducted in three custom applications and showed that pressure input and hand-posture sensing can be useful in a number of scenarios.

© All rights reserved Goel et al. and/or ACM Press

2011
 
Edit | Del

Hurst, Amy, Gajos, Krzysztof, Findlater, Leah, Wobbrock, Jacob, Sears, Andrew and Trewin, Shari (2011): Dynamic accessibility: accommodating differences in ability and situation. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 41-44.

Human abilities and situations are idiosyncratic and may change frequently. Static one-size-fits-many accessibility solutions miss the opportunities that arise from careful consideration of an individual's abilities and fail to address the sometimes dynamic aspect of those abilities, such as when a user's activity or context causes a "situational impairment." The goal of this workshop is to bring together researchers and practitioners in accessibility, mobile HCI, and interactive intelligent systems who are pursuing agile, data-driven approaches that enable interactive systems to adapt or become adapted to the needs and abilities of a particular individual in a particular context.

© All rights reserved Hurst et al. and/or their publisher

 
Add publication
Show list on your website
 

Join our community and advance:

Your
Skills

Your
Network

Your
Career

 
Join our community!
 
 
 

Changes to this page (author)

23 Nov 2012: Modified
09 Nov 2012: Modified
05 Jul 2011: Added

Page Information

Page maintainer: The Editorial Team
URL: http://www.interaction-design.org/references/authors/jacob_wobbrock.html

Upcoming Courses

go to course
User-Centred Design - Module 3
71% booked. Starts in 24 days
 
 

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !

 
 

Our Latest Books

 
 
The Social Design of Technical Systems: Building technologies for communities. 2nd Edition
by Brian Whitworth and Adnan Ahmad
start reading
 
 
 
 
Gamification at Work: Designing Engaging Business Software
by Janaki Mythily Kumar and Mario Herger
start reading
 
 
 
 
The Social Design of Technical Systems: Building technologies for communities
by Brian Whitworth and Adnan Ahmad
start reading
 
 
 
 
The Encyclopedia of Human-Computer Interaction, 2nd Ed.
by Mads Soegaard and Rikke Friis Dam
start reading