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Kevin Arthur does user experience research and design. This blog is a personal project and the opinions here are strictly my own.

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Usability Books
  • Cost-Justifying Usability, Second Edition: An Update for the Internet Age, Second Edition (Interactive Technologies)
    Cost-Justifying Usability, Second Edition: An Update for the Internet Age, Second Edition (Interactive Technologies)
    Morgan Kaufmann
  • Designing for the Digital Age: How to Create Human-Centered Products and Services
    Designing for the Digital Age: How to Create Human-Centered Products and Services
    by Kim Goodwin
  • Designing Gestural Interfaces
    Designing Gestural Interfaces
    by Dan Saffer
  • Designing Interactions
    Designing Interactions
    by Bill Moggridge
  • The Design of Design: Essays from a Computer Scientist
    The Design of Design: Essays from a Computer Scientist
    by Frederick P. Brooks
  • The Design of Everyday Things
    The Design of Everyday Things
    by Donald A. Norman
  • The Design of Future Things: Author of The Design of Everyday Things
    The Design of Future Things: Author of The Design of Everyday Things
    by Donald A. Norman
  • Designing the iPhone User Experience: A User-Centered Approach to Sketching and Prototyping iPhone Apps
    Designing the iPhone User Experience: A User-Centered Approach to Sketching and Prototyping iPhone Apps
    by Suzanne Ginsburg
  • Designing the Mobile User Experience
    Designing the Mobile User Experience
    by Barbara Ballard
  • Designing with the Mind in Mind: Simple Guide to Understanding User Interface Design Rules
    Designing with the Mind in Mind: Simple Guide to Understanding User Interface Design Rules
    by Jeff Johnson
  • Emotional Design: Why We Love (or Hate) Everyday Things
    Emotional Design: Why We Love (or Hate) Everyday Things
    by Donald A. Norman
  • Handbook of Usability Testing: Howto Plan, Design, and Conduct Effective Tests
    Handbook of Usability Testing: Howto Plan, Design, and Conduct Effective Tests
    by Jeffrey Rubin, Dana Chisnell
  • The Human-Computer Interaction Handbook: Fundamentals, Evolving Technologies and Emerging Applications, Second Edition (Human Factors and Ergonomics)
    The Human-Computer Interaction Handbook: Fundamentals, Evolving Technologies and Emerging Applications, Second Edition (Human Factors and Ergonomics)
    CRC Press
  • The Inmates Are Running the Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity
    The Inmates Are Running the Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity
    by Alan Cooper
  • Measuring the User Experience: Collecting, Analyzing, and Presenting Usability Metrics (Interactive Technologies)
    Measuring the User Experience: Collecting, Analyzing, and Presenting Usability Metrics (Interactive Technologies)
    by Thomas Tullis, William Albert
  • Moderating Usability Tests: Principles and Practices for Interacting (Interactive Technologies)
    Moderating Usability Tests: Principles and Practices for Interacting (Interactive Technologies)
    by Joseph S. Dumas, Beth A. Loring
  • Rocket Surgery Made Easy: The Do-It-Yourself Guide to Finding and Fixing Usability Problems
    Rocket Surgery Made Easy: The Do-It-Yourself Guide to Finding and Fixing Usability Problems
    by Steve Krug
  • Sketching User Experiences: Getting the Design Right and the Right Design (Interactive Technologies)
    Sketching User Experiences: Getting the Design Right and the Right Design (Interactive Technologies)
    by Bill Buxton
  • Tapworthy: Designing Great iPhone Apps
    Tapworthy: Designing Great iPhone Apps
    by Josh Clark
  • Text Entry Systems: Mobility, Accessibility, Universality (Morgan Kaufmann Series in Interactive Technologies)
    Text Entry Systems: Mobility, Accessibility, Universality (Morgan Kaufmann Series in Interactive Technologies)
    by I. Scott MacKenzie, Kumiko Tanaka-Ishii
  • The Trouble with Computers: Usefulness, Usability, and Productivity
    The Trouble with Computers: Usefulness, Usability, and Productivity
    by Thomas K. Landauer
  • Usability Engineering
    Usability Engineering
    by Jakob Nielsen
  • The Usability Engineering Lifecycle: A Practitioner's Handbook for User Interface Design (Interactive Technologies)
    The Usability Engineering Lifecycle: A Practitioner's Handbook for User Interface Design (Interactive Technologies)
    by Deborah J. Mayhew
  • User-Centered Design Stories: Real-World UCD Case Studies (Interactive Technologies)
    User-Centered Design Stories: Real-World UCD Case Studies (Interactive Technologies)
    by Carol Righi, Janice James
  • Usability Testing Essentials: Ready, Set...Test!
    Usability Testing Essentials: Ready, Set...Test!
    by Carol M. Barnum
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Saturday
Mar272010

Measuring Multitarget Selection Efficiency on Touch Interfaces

This is an interesting study from researchers at Berkeley published last year. Abstract:

Multitouch workstations support direct-touch, bimanual, and multifinger interaction. Previous studies have separately examined the benefits of these three interaction attributes over mouse-based interactions. In contrast, we present an empirical user study that considers these three interaction attributes together for a single task, such that we can quantify and compare the performances of each attribute. In our experiment users select multiple targets using either a mouse-based workstation equipped with one mouse, or a multitouch workstation using either one finger, two fingers (one from each hand), or multiple fingers. We find that the fastest multitouch condition is about twice as fast as the mouse-based workstation, independent of the number of targets. Direct-touch with one finger accounts for an average of 83% of the reduction in selection time. Bimanual interaction, using at least two fingers, one on each hand, accounts for the remaining reduction in selection time. Further, we find that for novice multitouch users there is no significant difference in selection time between using one finger on each hand and using any number of fingers for this task. Based on these observations we conclude with several design guidelines for developing multitouch user interfaces.

Link: Determining the Benefits of Direct-Touch, Bimanual, and Multifinger
Input on a Multitouch Workstation
.

Here are the guidelines they give (but please read the paper for the limitations/caveats).

Design Guidelines: Based on our experiment we recommend the following set of design guidelines for developing applications for multitouch workstations. Since our studies focus on multitarget selection, all of these guidelines are aimed at applications where target selection is the primary task.


  • A one finger direct-touch device delivers a large performance gain over a mouse-based device. For multitarget selection tasks even devices that detect only one point of touch contact can be effective.

  • Support for detecting two fingers will further improve performance, but support for detecting more than two fingers is unnecessary to improve multitarget selection performance.

  • Reserve same-hand multifinger usage for controlling multiple degrees of freedom or disambiguating gestures rather than for independent target selections.

  • Uniformly scaling up interfaces originally designed for desktop workstations for use with large display direct-touch devices is a viable strategy as long as targets are at least the size of a fingertip.


Full citation:

Determining the Benefits of Direct-Touch,
Bimanual, and Multifinger Input on a Multitouch Workstation


Kenrick Kin, Maneesh Agrawala, Tony
DeRose
. Graphics Interface 2009, May 2009. pp. 119-124.

Task

(Via multitouchup and google alerts.)

Reader Comments (1)

It really is a very interesting topic, isn't it?

It's interesting to see just how far ahead the iPhone is at the moment, but good to see HTC/Google improving all the time.

Thanks for the post.
March 31, 2010 | Unregistered CommenterIntuitionhq

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