I use the ASL 504 combined with a magnetic head tracking unit. This system
can accommodate small head movements and so means that participants don't
have to sit there like statues. It automatically reacquires the eye if
participants make bigger head movements e.g. if need to look down at the
keyboard to type, sneeze, etc.
Pete.
Dr. Peter Brawn
Usability Analyst and Eye Tracking Specialist
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-----Original Message-----
From: JEFFREY J HAYDEN [mailto:[log in to unmask]]
Sent: Tuesday, 25 May 2004 7:53 AM
To: [log in to unmask]
Subject: Re: [EM_LIST] question regarding lengthy experimentation
On Mon, 24 May 2004, Jason Varvoutis wrote:
> I am wondering if anyone has ever encountered problems with subjects
> getting headaches after using the Iscan head-mounted eye tracker for more
> than 45 minutes (or any other problems with experiments of this length).
> If so, do you have any suggestions on how to address such a problem, or an
> idea of what the time limit for the use of this kind of equipment is?
I'm not familiar with that equipment/setup, but I've used the ASL 504 on
participants for between 45-90 minutes and they say their eyes got tired
from looking at the computer screen and thinking/concentrating for so long,
and a couple of the longer sessions (60-90 min) wished they had someone to
massage their necks :-), but none of them reported any headaches.
Jeffrey
? ? ? ? ? ? ? ? ?
Jeffrey J. Hayden Dept of East Asian Langs and Lits
(ÍõÁú¾Ô/¤ýÀs¾s) University of Hawai'i at Manoa
eFax: 413.487.0389 http://www2.hawaii.edu/~jeffrey
[T]here is a difference between "joy" which is the result of very
hard work over a long period of time to achieve success and "fun"
which is instant gratification.
--Paul Gagnon
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