- http://www.cogain.org/glossary/115
- http://e-collection.ethbib.ethz.ch/ecol-pool/bericht/bericht_21.pdf - Study in to eye tracking involving cats
- http://www.useit.com/alertbox/reading_pattern.html - Study into eye tracking performed recently
- http://www.cs.cmu.edu/~sfussell/pubs/Manuscripts/Eye-tracking03.pdf - Eye tracking and health study
- http://www.mis.coventry.ac.uk/~pevery/306is/T6/stars/eyetracking.html Disavans of eye track
- http://www.webaim.org/articles/motor/assistive.php#eyetracking - For eye tracking devices
- http://www.uxmatters.com/MT/archives/000040.php Seing Through Your Users' Eyes
- http://www.pervasive.dk/ Information on Pervasive computing
- http://66.102.9.104/search?q=cache:yWMZiUt0ZxcJ:iat.ubalt.edu/courses/old/idia750.185_F02/alysenEspersen.ppt+%22advantages+of+using+eye+tracking%22&hl=en&ct=clnk&cd=2&gl=uk used to gather information of the advantages of eye tracking
Wednesday 2 May 2007
References
Video Clips
Eye Tracking Analysis Service
Disadvantages of Eye Tracking
- The equipment is expensive
- Some users can't work with the equipment (for example if they wear contact lenses or have long eye lashes)
- Calibrating the equipment takes time; this problem may resultantly cause the user to deviate from using the device.
Point elaboration -
Point 1 - It’s not cheap to outfit a lab with a decent eyetracker. Even Google, which has all the money in the world, has only outfitted one of their many labs. In addition to the money spent on the equipment, you have to spend money training people how to use it, which is not a cheap proposition.
Point 2 - not every participant can work with an eyetracker. Depending on the hardware, people with a variety of attributes automatically are disqualified from eyetracking. Everything from contact lenses to long eye lashes can get in the way of the device working properly.
Point 3 - Getting a participant set up and calibrated with the device can take time away causing a lack of interest in using the device.
Point 4 - Eye movements, like other passive and non-command inputs are often non-intentional, so they must be interpreted carefully to avoid unwanted responses to user actions. In terms of eye movement, we call this the "Midas Touch" problem. The problem of employing the use of an eye tracker interface is that people are not accustomed to operating devices simply by moving their eyes.
Point 5 - A major disadvantage is that the eye as a computer input device. Moving one's eyes is often an almost subconscious act. Unlike a mouse, it is relatively difficult to control eye position consciously and precisely at all times. Instability is introduced into the output of the eye tracker whenever it fails to obtain an adequate video image of the eye for one or more frames. This could mean that the user blinked or moved his or her head outside the tracked region.
Point 6 - As eye movements are so different from conventional computer inputs, we achieve best results with a philosophy that tries, as much as possible, to use natural eye movements as an implicit input, rather than to train a user to move the eyes in a particular way to operate the system.
Advantages of Eye Tracking and Usability
Eye tracking is a valuable yet cost-effective addition to any usability testing and compliments task-based observation methods well. (Source: http://www.simpleusability.com/services/usability/eye-tracking)
Advantages:
- Eye movement is faster than other current input media
- No training or particular coordination is required of normal users
- Can determine where the user’s interest is focused automatically
- Helpful for usability studies to understand users interact with their environments
Potential Applications
- Eye gaze correction for videoconferencing
- Maximizing controllers’ efficiency, minimizing dangers in air traffic displays
- Developing video games and graphics
- Marketing research and E-commerce website development
- Potentially could provide new and more effective methods of computer-human interaction.
Eye Tracking can tell whether users are looking at the screen, reading information or scanning information. It can also show the intensity of the user’s attention and can determine whether a user is searching for specific information.
if we intend to tell more about advantages we can add:
Easy
- Very quick set up. No complicated hardware to configure, simply install the PCI card in your computer and load the software
- Intuitive user interface
- Real-time feedback of eye movement data
- The Auto-threshold feature quickly provides luminance threshold values for discriminating both the pupil and glint automatically
- No calibration is required for many applications
- Easy Slip Correction feature and re-presentation of stray calibration points
- Automatic blink detection and suppression
- The powerful SDK makes it very easy to interface eye tracking with your other applications
- SlideShow -- super-easy stimulus presentation for experiments
- Intuitive graphical analysis of data with fixation-time representation
Flexible
- Select between 30 Hz and 60 Hz operation modes
- Robust against different lighting conditions
- Pupil-only tracking, Glint-only tracking, or choose Pupil-Glint Vector tracking that provides tolerance to head movements
- Choose between Dark Pupil or Bright Pupil tracking
- Run ViewPoint on the same computer as your stimulus presentation or on a remote computer
- Real-time interface between the computer running ViewPoint and other computers (PC or Mac) provides maximum flexibility
- Software Developers Kit provides complete external control of ViewPoint
- Visual Range +/- 44° of visual arc horizontal and +/- 20° vertical
Eye Tracking: An Assistive Technology
VisionKey
VisionKey combines a viewer mounted on a pair of standard frames with a small control unit. An eye tracker and a microcomputer measure the position of the eye and when a selection is made, it appears on the control unit LCD and on the computer. Users look at a specific word, letter or character on the chart in front of their eye and "type" by holding their gaze until a selection is confirmed by a green highlight and a beep.
More Detailed Description
Eye tracking devices can be a powerful alternative for individuals with no control, or only limited control, over their hand movements. The device follows the movement of the eyes and allows the person to navigate through the web with only eye movements. Special software allows the person to type, and may include word-completion technology to speed up the process. These systems can be expensive—usually in the thousands of US dollars—so they are less common than the less sophisticated devices, such as mouth sticks and head wands.
What is Eye Tracking?
The following researched graphs show the difference between male and female eye tracking.
Source:http://www.eye-square.com/documents/EyeTracking-ResearchApplications.pdf From the source above usability testing was conducted to see the difference patterns between male and female.
As you can see in graph 1 the focus time spent by a female for texture information is far greater then a male. The male tend to focus more time on pictures.
Graph 2 shows how both male and female rate information. Females believe images are more important yet their focus eye tracking is fixed on text and male believe text is more important yet their focused eye tracking is fixed on images.