(updated Oct 17, 2007)

Frequently Asked Questions

The following information is offered to answer the most frequently asked questions of our Lab:

  1. What is the formal definition of the quiet eye?
  2. What is "Decision Training"?
  3. What is Quiet Eye Solutions? And what new features are planned?
  4. Do you offer gaze measurement services?
  5. What type of Eye Trackers do you use? And other equipment?

1. What is the formal definition of the quiet eye? For a given motor task, the quiet eye is the final fixation or tracking gaze that is located on a specific location or object in the visuo-motor workspace within a minimum 3° of visual angle (or less) for a minimum of 100 ms. The onset of the quiet eye occurs prior to the final movement in the task. The offset of the quiet eye occurs when the gaze deviates off the object or location by more than 3° of visual angle (or less) for a minimum of 100 ms, therefore the quiet eye can carry through and beyond the final movement of the task. The quiet eye of elite performers is significantly longer than that of near-elite or lower skilled performers, meaning those who consistently achieve high levels have learned to fixate or track critical objects or locations for longer durations irrespective of the conditions encountered. The quiet eye onset of elite performers is invariably earlier; elite performers have found a way to see critical visual information earlier than near-elite and lower skilled performers and to process this information longer prior to making the final movement. Finally, the quiet eye of elite performers is of optimal duration being neither too long nor too short, but ideal given the constraints of the task being performed.

2. What is Vision-in-Action? In our lab we have developed the Vision-in-Action system for collecting gaze data from athletes with coupled motor behaviour. Three synchronized video images are mixed into one screen. It consists of the Gaze data image, the motor behaviour image, and the eye image, and timecode added by a timecode generator. It is either mixed live using video mixers, or assembled and synchronized after recording using Quiet Eye Solutions or video editing software. It is a method of collecting video data that allows one to analyze the participant's gaze and motor behaviour together, in the same time frame. Examples are of each are found on the home page of this site; and for the first time we have made available a variety of other data samples for Decision Training Institute members.

3. What is Quiet Eye Solutions? And what new features are planned? Quiet Eye Solutions is a dedicated software package we have developed, based on my research, that codes coupled gaze and motor data on video. It is designed to simplify and speed up the coding process, and calculate the Quiet Eye. When participants move freely in their environment we have found that coding the Gaze and Motor behaviour on video, once captured to computer, is the best and often the only way to analyze the data. QES' most recent version has the option to work with PAL video at 25fps, as well as NTSC at ~30fps. It detects the frame rate and adjusts the calculations automatically. It is capable of importing separate Gaze and Motor videos and quickly synchronizing them. In the future QES will allow two synchronized videos to be exported as one for permanent synchronization, as a much quicker and cheaper alternative to using video editing software.

4. Do you offer gaze measurement services? We offer a consulting, data collection and analysis service for interested parties. Please see our Quiet Eye testing and training page, or e-mail us at contactus@quieteyesolutions.com if we can be of help.

5. What type of Eye Trackers do you use? And other equipment? We have used eye trackers from ASL (Applied Science Laboratories) of Bedford, Mass., for about 20 years. Presently we have a Mobile Eye and a 6000 system. You can contact Eileen Smith at ASL.

It is recommended that the gaze data be synchronized with an external Motor video of the participant's movements. We accomplish this with the Mobile Eye using our own program, Quiet Eye Solutions. We also combine video images using Final Cut Pro when providing video to clients.
With the 6000, for years we have mixed the video feeds from the gaze, motor and eye images with two Videonics video mixers, and add timecode using a Horita timecode generator.


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