Upcoming Courses

go to course
Quality Web Communication: The Beginner's Guide
go to course
UI Design Patterns for Successful Software
91% booked. Starts in 4 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

Geoffrey Tien


Publications by Geoffrey Tien (bibliography)

 what's this?
Edit | Del

Tien, Geoffrey, Atkins, M. Stella and Zheng, Bin (2012): Measuring gaze overlap on videos between multiple observers. In: Proceedings of the 2012 Symposium on Eye Tracking Research & Applications 2012. pp. 309-312. http://dx.doi.org/10.1145/2168556.2168623

For gaze-based training in surgery to be meaningful, the similarity between a trainee's gaze and an expert's gaze during performance of surgical tasks must be assessed. As it is difficult to record two people's gaze simultaneously, we produced task videos made by experts, and measured the amount of overlap between the gaze path of the expert surgeon and third-party observers while watching the videos. For this investigation, we developed a new, simple method for displaying and summarizing the proportion of time during which two observers' points of gaze on a common stimulus were separated by no more than a specified visual angle. In a study of single-observer self-review and multiple-observer initial view of a laparoscopic training task, we predicted that self-review would produce the highest overlap. We found relatively low overlap between watchers and the task performer; even operators with detailed task knowledge produce low overlap when watching their own videos. Conversely, there was a high overlap among all watchers. Results indicate that it may be insufficient to improve trainees' eye-hand coordination by just watching a video. Gaze training will need to be integrated with other teaching methods to be effective.

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

Edit | Del

Atkins, M. Stella, Jiang, Xianta, Tien, Geoffrey and Zheng, Bin (2012): Saccadic delays on targets while watching videos. In: Proceedings of the 2012 Symposium on Eye Tracking Research & Applications 2012. pp. 405-408. http://dx.doi.org/10.1145/2168556.2168648

To observe whether there is a difference in eye gaze between doing a task, and watching a video of the task, we recorded the gaze of 17 subjects performing a simple surgical eye-hand coordination task. We also recorded eye gaze of the same subjects later while they were watching videos of their performance. We divided the task into 9 or more sub-tasks, each of which involved a large hand movement to a new target location. We analyzed the videos manually and located the video frame for each sub-task where the operator's saccadic movement began, and the frame where the watcher's eye movement began. We found a consistent delay of about 600 ms between initial eye movement when doing the task, and initial eye movement when watching the task, observed in 96.3% of the sub-tasks. For the first time, we have quantified the differences between doing and watching a manual task. This will help develop gaze-based training strategies for manual tasks.

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

Edit | Del

Tien, Geoffrey and Atkins, M. Stella (2008): Improving hands-free menu selection using eyegaze glances and fixations. In: Rih, Kari-Jouko and Duchowski, Andrew T. (eds.) ETRA 2008 - Proceedings of the Eye Tracking Research and Application Symposium March 26-28, 2008, Savannah, Georgia, USA. pp. 47-50. http://doi.acm.org/10.1145/1344471.1344482

Add publication
Show list on your website

Join our community and advance:




Join our community!

Page Information

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