On Tue, May 09, 2006 at 11:28:23AM -0000, Eyetracking@yahoogroups.com wrote:
>[..]
>As we are novices in the field of eye tracking – we started to use
>eye tracking (also the Tobii system) six months before – we are very
>interested to learn from others'  experiences. We use eye tracking
>for website testing as well as for dynamic video stimuli (e.g. in
>our iTV project).  I read in the workshop slides, that dynamic
>stimuli are one of the most challenging areas. I'm relieved to hear
>that not only we had some problems to manage with this specific
>context.
>
>I've also some comments / questions related to the workshop slides
>and to your work:
>
>- During the workshop, were there reported some practical
>examples/experiences about the use of eye tracking for dynamic
>stimuli? (some links,  interesting contacts…)
>
>- Did you ever manage to define AOIs for dynamic stimulis with the
>Tobii system?
>
>- How do you combare eye tracking data from different users from the
>same usability test?
>
>[..]

To handle dynamic stimuli, one idea (current best practice?) that was
suggested was to re-instrument whatever application you had to keep
track of dynamic AOIs (or objects) and eye movements.  This usually
requires adding code to the application of interest, which is most
likely a significant undertaking.  Still, the Tobii eye tracker does
provide an SDK to allow this (I believe using C++ or C# under Windows;
there is also a Linux client that we wroet but you'd need to ask Tobii
for permission in order for me to release it).

We at Clemson have been doing this kind of thing almost exclusively
since we generally develop our applications from scratch (in the
Linux environment).  The downside to this is that our applications
are not what users typically use and are academic creations lacking
the sophistication of commercial products.  However, for basic research
problems, these types of apps often suffice in elucidating a studied
phenomenon.

One of our most recent practical examples comes from students in my
eye tracking class last (fall) semester, where they built a low
fidelity driving simulator.  An example of a moving AOI was a
hazardous vehicle in a 3D dynamic driving scene.  To be more
technically specific, the AOI was a bounding box around the vehicle,
if I remember their implementation correctly.   The simulator resembled
a first-person driving game, where the hazardous vehicle would move
relative to the viewer (e.g., pass at high velocity, or swerve ahead
of the driver).  They should be in Sarasota, FL tomorrow presenting
their results.  If you can't make it there, a preprint of their poster
is available here:
   <http://andrewd.ces.clemson.edu/research/vislab/docs/VSS06.pdf>

From the poster you should at least get a feel for the application
and the coding effort that was required to track the moving vehicles
and count fixations upon them.  In 3D parlance, what is going on
is unprojection of the (x,y) gaze cooridnate into a ray shooting
through the (x,y) screen pixel into the screen, then a simple
ray-casting intersection test with the 3D dynamic stimuli visible
in the view frustum.  In 2D applications, you wouldn't need to do
the 3D back projection (hence just a simple point-in-polygon query),
but would still need to track where the AOI was at each "frame" of
the simulation (or instance in time) to allow synchronization
(intersection test) with the eye movement sample at time t.

>Sorry to ask so many questions, but I'm really curious to learn from
>your experience. If you like to know more about our research areas,
>please visit: http://www.icts.sbg.ac.at . For information about our
>attemps to integrate eye tracking into traditional usability tests,
>please feel free to contact me - even if we are just starting to use
>it :)

Those are all interesting projects although I'm not sure in which
one you're attempting to use the Tobii -- iTV?

Cheers,
Andrew

--
Andrew T. Duchowski, Assoc.Prof.  309 McAdams Hall (area code: 864)
Computer Science Dept.,  MS-0974  tel:656.7677 fax:656.0145 cel:247.2050
Clemson Univ., Clemson, SC 29634  duchowski@...
http://www.e-t-r-a.org            http://andrewd.ces.clemson.edu

Dear Marianna,

I have done a lot of usability testing, and studies of visual attention
and emotional response using a Tobii eyetracker. At the moment I am doing
a study of dynamic stimuli (broadcast television).

I you want to define AOIs for dynamic stimuli, you will need to install
the latest version of Clearview (v2.6.3). After installation you can
define scenes, and AOIs for each scenes. This is obviously not that useful
if you have extremely dynamic stimuli, where each scene may only last for
a fraction of a second.

I you need to do comparison between subjects, and you're not satisfied
with clearview spreadsheet templates, you could do sequence analysis to
compare gaze patterns. You are most welcome to contact me, if you want
further details.

I think you will be able to find som interesting articles at this site:
http://www.warc.com

Kind regards
Sune

>  - During the workshop, were there reported some practical
>  examples/experiences about the use of eye tracking for dynamic
>  stimuli? (some links,  interesting contacts…)
>
>  - Did you ever manage to define AOIs for dynamic stimulis with the
>  Tobii system?
>
>  - How do you combare eye tracking data from different users from the
>  same usability test?



>    Hi All
>  Can any o0ne help Marriana? I have replied but you may have more
>  uptodate info.Please feel free to contact her direct or even through
>  this portal.
>  Tony Renshaw
>  Dear Tony,
>  thank you for the information, I found it very useful … also your
>  website.
>  As we are novices in the field of eye tracking – we started to use
>  eye tracking (also the Tobii system) six months before – we are very
>  interested to learn from others'  experiences. We use eye tracking
>  for website testing as well as for dynamic video stimuli (e.g. in
>  our iTV project).  I read in the workshop slides, that dynamic
>  stimuli are one of the most challenging areas. I'm relieved to hear
>  that not only we had some problems to manage with this specific
>  context.
>
>  I've also some comments / questions related to the workshop slides
>  and to your work:
>
>  - During the workshop, were there reported some practical
>  examples/experiences about the use of eye tracking for dynamic
>  stimuli? (some links,  interesting contacts…)
>
>  - Did you ever manage to define AOIs for dynamic stimulis with the
>  Tobii system?
>
>  - How do you combare eye tracking data from different users from the
>  same usability test?
>
>
>
>  Sorry to ask so many questions, but I'm really curious to learn from
>  your experience. If you like to know more about our research areas,
>  please visit: http://www.icts.sbg.ac.at . For information about our
>  attemps to integrate eye tracking into traditional usability tests,
>  please feel free to contact me - even if we are just starting to use
>  it :)
>
>
>
>  best regards from Salzburg,
>
>  Marianna
>
>
>
>  -----------------------------------------------
>  Mag. Marianna Obrist
>  Human-Computer Interaction and Usability Unit
>
>  ICT&S - Center for Advanced Studies and Research in Information and
>  Communication Technologies & Society University of Salzburg
>
>  Sigmund-Haffner-Gasse 18, 5020 Salzburg, Austria
>  Phone:  +43.662.8044.4808, Fax: +43.662.6389.4800
>  marianna.obrist@... www.icts.sbg.ac.at
>
>
>
>
>
>
>
>         SPONSORED LINKS
>    Computer internet security
>  Hci mortgage                                       Computer
> internet training
>                    Uses of stem cells
>          Computer internet business
>        Computer internet access
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>      To unsubscribe from this group, send an email to:
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>      Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>

Hi All
Can any o0ne help Marriana? I have replied but you may have more
uptodate info.Please feel free to contact her direct or even through
this portal.
Tony Renshaw
Dear Tony,
thank you for the information, I found it very useful … also your
website.
As we are novices in the field of eye tracking – we started to use
eye tracking (also the Tobii system) six months before – we are very
interested to learn from others'  experiences. We use eye tracking
for website testing as well as for dynamic video stimuli (e.g. in
our iTV project).  I read in the workshop slides, that dynamic
stimuli are one of the most challenging areas. I'm relieved to hear
that not only we had some problems to manage with this specific
context.

I've also some comments / questions related to the workshop slides
and to your work:

- During the workshop, were there reported some practical
examples/experiences about the use of eye tracking for dynamic
stimuli? (some links,  interesting contacts…)

- Did you ever manage to define AOIs for dynamic stimulis with the
Tobii system?

- How do you combare eye tracking data from different users from the
same usability test?



Sorry to ask so many questions, but I'm really curious to learn from
your experience. If you like to know more about our research areas,
please visit: http://www.icts.sbg.ac.at . For information about our
attemps to integrate eye tracking into traditional usability tests,
please feel free to contact me - even if we are just starting to use
it :)



best regards from Salzburg,

Marianna



-----------------------------------------------
Mag. Marianna Obrist
Human-Computer Interaction and Usability Unit

ICT&S - Center for Advanced Studies and Research in Information and
Communication Technologies & Society University of Salzburg

Sigmund-Haffner-Gasse 18, 5020 Salzburg, Austria
Phone:  +43.662.8044.4808, Fax: +43.662.6389.4800
marianna.obrist@... www.icts.sbg.ac.at

Thanks Natalie... I'll try to contact them.

See you in Montreal...

Sune

> Hi Sune,
>
> There are people who have been looking at eyetracking in terms of
> reducing bandwidth or processing power with video i.e. only the area
> fixated within a video is shown at full fidelity. I imagine they must
> look at eyetracking dynamic areas of interest - though perhaps not live
> video.
>
> John McCarthy and Jens Riegelsberger mentioned eyetracking of dynamic
> video at  the British HCI 2005 workshop. They may be worth contacting.
>
> cheers
> natalie
>
>
> ________________________________
>
> From: Eyetracking@yahoogroups.com [mailto:Eyetracking@yahoogroups.com]
> On Behalf Of Renshaw, Tony
> Sent: 10 April 2006 08:27
> To: Eyetracking@yahoogroups.com
> Subject: RE: [Eyetracking] Tracking of live sports tv
>
>
>
> Hi Sune
>
> Sorry I don't have any experience of this but I share your interest. I
> would be particularly interested in how one can keep track of dynamic
> areas of interest.
>
> Tony R
>
>
>
> -----Original Message-----
> From: Eyetracking@yahoogroups.com [mailto:Eyetracking@yahoogroups.com]
> On Behalf Of sunealstrup
> Sent: 02 April 2006 21:19
> To: Eyetracking@yahoogroups.com
> Subject: [Eyetracking] Tracking of live sports tv
>
>
>
> Do anyone of you have experience with eye tracking of sporting
> events on live television? E.g. football or basketball matches.
>
> I am about to conduct such a study, and are very interested in learning
> about previous experience with this kind of study.
>
> Look forward to meeting you all in Montreal...
>
> Kind regards
> Sune Alstrup
>
>
>
>
>
>
>
>
>
>
>
> To view the terms under which this email is distributed, please go to
> http://disclaimer.leedsmet.ac.uk/email.htm
>
>
> ________________________________
>
> YAHOO! GROUPS LINKS
>
>
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>
> ________________________________
>
>
>

Do anyone of you have experience with eye tracking of sporting
events on live television? E.g. football or basketball matches.

I am about to conduct such a study, and are very interested in learning
about previous experience with this kind of study.

Look forward to meeting you all in Montreal...

Kind regards
Sune Alstrup

This campaign is about Human beings, Democracy, UNHCR, Refugees, The Iraqis,
Islam, Kurds, Human rights, Respect, Money, Donations, Angelina Jolie,
Pavarotti, Giorgio Armani, Donors, Peace, History, Campaigns and about you if
you care about these words.

Hi there,

I am SAM, an Iraqi refugee living in Lebanon at the moment; I have spent the
last 10 years of my life as a refugee registered with the UNHCR in Beirut. The
last 4 years, I have spent as an activist for peace and human rights (especially
refugees and asylum seekers) on the Internet; I'm also books author and ebooks
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helped make many changes and improvements at the UNHCR office in Beirut; I used
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This is my newest campaign, it's about the illegal and humiliating actions of
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see here: http://home.graffiti.net/lebanon2/human-buttons.htm

Also you can read my new campaign 'Urgent, we need smile' here:
http://unhcrlebanon.topcities.com/smile.html

For more info about UNHCR and life of refugees you can read my free ebooks. I
invite you as fellow humans and members of the world community to support my
campaign by reading my article on my site and see the human-buttons. The
campaign is to support and improve the UNHCR http://www.unhcr.org especially
after the last scandals in the UN and UNHCR, just for example:
http://www.mizzima.com/archives/news-in-2005/news-in-april/12-April05-22.htm

"We make demonstration and fast because the UNHCR office in Cairo did nothing
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Together we will build better world.

You could reach me fast via this form:
http://lebanon.exactpages.com/email_me.htm
  and if you like to know more about me, you can google for my name 'osam
altaee'.

Thanks
THE TRUTH WARRIOR
http://lebanon.dreamstation.com
  http://www.unhcr.us

-----Original Message-----
From: Deborah Tatar [mailto:tatar@...]
Sent: 13 February 2006 16:03
Subject: Just to clarify: CHI does not publish position papers for
workshops

CHI does not publish position papers written by individual attendees
for workshops, only the abstract that the organizers (you) wrote for
the workshop as a whole.

Can you please clarify this with your participants, if need be?  In
any case, please ask them not to send email to the technical chair,
the conference chair and especially not the publisher.  If they (or
you) have questions, please ask us.

You may publish position papers on websites that you make for the
workshop, or may use them for other purposes.   CHI workshops are not
so formal that the position papers should have to be publishable.

D.

Deborah Tatar, Ph.D.
Associate Professor of Computer Science and, by courtesy, Psychology
Member, Center for Human-Computer Interaction
508 McBryde Hall
Virginia Tech
Blacksburg, VA 24060
Email: tatar@...
Website: people.cs.vt.edu/~dtatar
(540)231-8457 (office)
(540)231-6075 (fax)

Dear Mr. Renshaw,

I am wondering if you have received my prevous e-mail in which I asked for your
help. Since I haven't received the invitation letter from you yet, I hope you
can give me an anwser whether it is possible to get the letter from you. The
e-mail I sent you two days ago is attached below. Waiting for your answer! Thank
you!

Ying-Hua Guan


The previous message:

Dear Mr. Renshaw,

I am an attendee of the workshop "Getting a Measure of Satisfaction from Eye
Tracking in Practice". Because I am working as an assistant professor at Chung
Yuan Christian University, I need an invitation letter from the workshop
organizer to ask for leave (for attending the workshop and the conference) and
to apply for the travel funding. I might also need the letter for applying for a
visa. Could you please send me an invitation letter by fax (or by e-mail)? Thank
you very much in advance!

My fax number is: ++886-3-2656630

If there is any problem, please contact me as soon as possible!

Ying-Hua Guan
Department of Applied Linguistics and Language Studies
Chung Yuan Christian University
200 Chung-Pei Rd., Chung Li,
32023 Taiwan, R.O.C.


--==Mailed via CYCU Webmail==--

Hi All
Just to let you know two new papers have been added on the Amberlight
(CHI2006) website.http://www.amber-
light.co.uk/CHI2006/CHI2006ETWkshop.htm

I welcome Janet Read and Laura Cowen to our select group and very much
hope that they can make Montreal.
Tony R

Hi
Just thought you would like to know that we have invited new members
to this formum. The new members are those that are coming to the
CHI2006 workshop in Montreal. Feel free to join in the discussions.BTW
Natalie has posted the position papers for the Montreal session on the
Amberlight web site.http://www.amber-
light.co.uk/CHI2006/CHI2006ETWkshop.htm
Best wishes
Tony Renshaw

Hi All
I wish you alla Merry Christmas and a very Prosperous New Year! I
thought you might also be interested to know that the deadline for our
CHI 2006 workshop has been extended to 15 January so you can have a
good Christmas and write a paper! Good eh!
Tony Renshaw

I thought it was now in december, I have mixed the months!!!
Thanks!

Puh,
Lotta :-)




>>> t.renshaw@... 2005-12-15 17:26:45 >>>
Yep you have until the 16 JANUARY, JANUARY 2006 . Relax its Christmas!

tr



-----Original Message-----
From: Eyetracking@yahoogroups.com [mailto:Eyetracking@yahoogroups.com]
On Behalf Of Charlotte Sennersten
Sent: 15 December 2005 16:21
To: Eyetracking@yahoogroups.com
Subject: Sv: RE: [Eyetracking] CHI 2006 Eye tracking Workshop
April2006Montreal



So it is the 16th tomorrow, is that still okej then?
/Charlotte





>>> t.renshaw@... 2005-12-15 17:03:39 >>>
Hi

Yes of course I've extended the deadline to 15 January 2006 (only
yesterday).

Tony Renshaw



-----Original Message-----
From: Eyetracking@yahoogroups.com [mailto:Eyetracking@yahoogroups.com]
On Behalf Of Charlotte Sennersten
Sent: 15 December 2005 12:40
To: Eyetracking@yahoogroups.com
Subject: Sv: [Eyetracking] CHI 2006 Eye tracking Workshop April
2006Montreal



Hi Tony!

Is it posssible to turn in the paper in publication format tomorrow?

Bets Regards,
Charlotte Sennersten




>>> t.renshaw@... 2005-11-11 09:37:54 >>>
Hi All
I hope all is well and that you are all working hard. I am posting
this note to let you know that Natalie and I have been successful in
getting CHI 2006 to accept our proposal for a further workshop
featuring eye tracking. Although the topic is similar to HCI 2005 we
hope the new version has benefitted from feedback received (thank you)
and of course there will be a greater North American presence.
I do hope you will give serious thought to coming to Montreal to take
the Edinburgh discussions further.
Best Wishes,
Tony, Natalie

ps I have posted a file containing a draft CFP and I am sure that
conference details will be updated by the end of this month.







Yahoo! Groups Links











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So it is the 16th tomorrow, is that still okej then?
/Charlotte





>>> t.renshaw@... 2005-12-15 17:03:39 >>>
Hi

Yes of course I've extended the deadline to 15 January 2006 (only
yesterday).

Tony Renshaw



-----Original Message-----
From: Eyetracking@yahoogroups.com [mailto:Eyetracking@yahoogroups.com]
On Behalf Of Charlotte Sennersten
Sent: 15 December 2005 12:40
To: Eyetracking@yahoogroups.com
Subject: Sv: [Eyetracking] CHI 2006 Eye tracking Workshop April
2006Montreal



Hi Tony!

Is it posssible to turn in the paper in publication format tomorrow?

Bets Regards,
Charlotte Sennersten




>>> t.renshaw@... 2005-11-11 09:37:54 >>>
Hi All
I hope all is well and that you are all working hard. I am posting
this note to let you know that Natalie and I have been successful in
getting CHI 2006 to accept our proposal for a further workshop
featuring eye tracking. Although the topic is similar to HCI 2005 we
hope the new version has benefitted from feedback received (thank you)
and of course there will be a greater North American presence.
I do hope you will give serious thought to coming to Montreal to take
the Edinburgh discussions further.
Best Wishes,
Tony, Natalie

ps I have posted a file containing a draft CFP and I am sure that
conference details will be updated by the end of this month.







Yahoo! Groups Links











________________________________

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*          Visit your group "Eyetracking
<http://groups.yahoo.com/group/Eyetracking> " on the web.


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Service <http://docs.yahoo.com/info/terms/> .



________________________________



To view the terms under which this email is distributed, please go to
http://disclaimer.leedsmet.ac.uk/email.htm

Hi Tony!

Is it posssible to turn in the paper in publication format tomorrow?

Bets Regards,
Charlotte Sennersten




>>> t.renshaw@... 2005-11-11 09:37:54 >>>
Hi All
I hope all is well and that you are all working hard. I am posting
this note to let you know that Natalie and I have been successful in
getting CHI 2006 to accept our proposal for a further workshop
featuring eye tracking. Although the topic is similar to HCI 2005 we
hope the new version has benefitted from feedback received (thank you)
and of course there will be a greater North American presence.
I do hope you will give serious thought to coming to Montreal to take
the Edinburgh discussions further.
Best Wishes,
Tony, Natalie

ps I have posted a file containing a draft CFP and I am sure that
conference details will be updated by the end of this month.







Yahoo! Groups Links

Hi, Tony and Natalie!

This sounds great and I hope I can go.

I would like to send a special hi to Natalie because I got a masterthesis the
other day by Tim Geoghegan which Natalie and AmberLight were part of in
supervision.

Say hi to AmberLight especially Gigi!!!

Best Regards,
Charlotte



>>> t.renshaw@... 2005-11-11 09:37:54 >>>
Hi All
I hope all is well and that you are all working hard. I am posting
this note to let you know that Natalie and I have been successful in
getting CHI 2006 to accept our proposal for a further workshop
featuring eye tracking. Although the topic is similar to HCI 2005 we
hope the new version has benefitted from feedback received (thank you)
and of course there will be a greater North American presence.
I do hope you will give serious thought to coming to Montreal to take
the Edinburgh discussions further.
Best Wishes,
Tony, Natalie

ps I have posted a file containing a draft CFP and I am sure that
conference details will be updated by the end of this month.







Yahoo! Groups Links

Hi All
I hope all is well and that you are all working hard. I am posting
this note to let you know that Natalie and I have been successful in
getting CHI 2006 to accept our proposal for a further workshop
featuring eye tracking. Although the topic is similar to HCI 2005 we
hope the new version has benefitted from feedback received (thank you)
and of course there will be a greater North American presence.
I do hope you will give serious thought to coming to Montreal to take
the Edinburgh discussions further.
Best Wishes,
Tony, Natalie

ps I have posted a file containing a draft CFP and I am sure that
conference details will be updated by the end of this month.

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Eyetracking
group.

   File        : /Getting_Satisfaction_from_EyeTracking_extract.pdf
   Uploaded by : j_a_renshaw <t.renshaw@...>
   Description : CHI 2006 Eye tracking workshop CFP

You can access this file at the URL:
http://groups.yahoo.com/group/Eyetracking/files/Getting_Satisfaction_from_EyeTra\
cking_extract.pdf

To learn more about file sharing for your group, please visit:
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Regards,

j_a_renshaw <t.renshaw@...>

Hi all,

There has been an interesting discussion on eye tracking taking place on the UTEST e-mailing list. In case you are not aware of it here is the first mail that came in. You can subscribe and retrieve the posts from the archives.

[How do I join the UTEST list?]

To subscribe to UTEST, contact the list owner, Dr. Tharon Howard, at THARON@....  Note that UTEST is a closed, private list, so please do not publish information about subscribing to the list without permission from the listowner and/or the UTEST Advisory Council.

OR

We can start sharing our views on this matter here.

Best wishes,

Katerina

-----Original Message-----
From: USABILITY TESTING COMMUNITY [mailto:UTEST-L@...] On Behalf Of Dr Jon Dodd
Sent: 05 September 2005 11:14
To: UTEST-L@...
Subject: A new testing methodology - alternative to talk aloud - comments please

Dear All,

We presented a tutorial at Measuring Behaviour this week in the Netherlands that

included a new methodology for user testing. The session was well received and

we would like to get further feedback from U Test members about the it.

The new methodology is Post Experience Eyetracked Protocol (PEEP) requires using

an eyetracker to track the movements of the users whilst they are performing

tasks.

The key is that users are not required to talk aloud during the testing

session.

An observer views (from a different room) the live eyetracking data of the user

in real time, and sometimes (depending on the tasks) a moderator is NOT present

in the room with the participant.

When the testing session is finished a moderator uses data gathered by the

eyetracking system to go through the participant's experiences with them. This

may includes:

1. Replaying part or all of their Eyetrack video as a memory cue to what they

were doing and thinking at a given time,

2. Using gaze path analysis diagrams to search for long fixations (often

indicative of confusion and engagement) and backtrack saccades (often

indicative of a complex decision making process)

3. Using of hotspot analysis to show where users paid most and least attention

to on the site.

This post test investigation is supported by a semi structured questionnaire,

and skilled interviewing by the moderator.

The advantages of this over talk aloud are that we are not forcing the

introspection that comes with talk aloud - allowing us to observe more natural

behaviour and measure more natural eyetracking behaviour. But crucially we do

not miss the valuable qualitative stuff either - the essential thing is that

the eyetracking provides a potent cue to what the user was doing during their

session - and they readily respond to it. Also we can potentially ask more

probing questions as we are not under 'real time'pressure, and are less

concerned about leading the task orientated behaviour(because it has already

taken place!).

We have been using this method for over a year now with client work and have

been impressed with the results. But we wanted to get a more formal handle on

is so we have been working with the University of Lancaster in the United

Kingdom on validation on the methodology.

The most basic finding is that, unsurprisingly, talk aloud produces

significantly different behaviour as compared to more natural behaviour - as

evidenced by eyetrack records. But also preliminary findings indicate that PEEP

reveals significantly more usability problems than Think Aloud (F(1,11)=8.520,

p<0.014) (sample = 24). We will be publishing a paper on it later this year,

but your comments would be most welcome.

Regards

Jon Dodd and Robert Stevens

--

Dr Jon Dodd

Director - Bunnyfoot

jon@...

T: +44 (0)845 644 0650

F: +44 (0)845 644 0651

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Hi all,

There has been an interesting discussion on eye tracking taking place on the UTEST e-mailing list. In case you are not aware of it here is the first mail that came in. You can subscribe and retrieve the posts from the archives.

[How do I join the UTEST list?]

To subscribe to UTEST, contact the list owner, Dr. Tharon Howard, at THARON@....  Note that UTEST is a closed, private list, so please do not publish information about subscribing to the list without permission from the listowner and/or the UTEST Advisory Council.

OR

We can start sharing our views on this matter here.

Best wishes,

Katerina

-----Original Message-----
From: USABILITY TESTING COMMUNITY [mailto:UTEST-L@...] On Behalf Of Dr Jon Dodd
Sent: 05 September 2005 11:14
To: UTEST-L@...
Subject: A new testing methodology - alternative to talk aloud - comments please

Dear All,

We presented a tutorial at Measuring Behaviour this week in the Netherlands that

included a new methodology for user testing. The session was well received and

we would like to get further feedback from U Test members about the it.

The new methodology is Post Experience Eyetracked Protocol (PEEP) requires using

an eyetracker to track the movements of the users whilst they are performing

tasks.

The key is that users are not required to talk aloud during the testing

session.

An observer views (from a different room) the live eyetracking data of the user

in real time, and sometimes (depending on the tasks) a moderator is NOT present

in the room with the participant.

When the testing session is finished a moderator uses data gathered by the

eyetracking system to go through the participant's experiences with them. This

may includes:

1. Replaying part or all of their Eyetrack video as a memory cue to what they

were doing and thinking at a given time,

2. Using gaze path analysis diagrams to search for long fixations (often

indicative of confusion and engagement) and backtrack saccades (often

indicative of a complex decision making process)

3. Using of hotspot analysis to show where users paid most and least attention

to on the site.

This post test investigation is supported by a semi structured questionnaire,

and skilled interviewing by the moderator.

The advantages of this over talk aloud are that we are not forcing the

introspection that comes with talk aloud - allowing us to observe more natural

behaviour and measure more natural eyetracking behaviour. But crucially we do

not miss the valuable qualitative stuff either - the essential thing is that

the eyetracking provides a potent cue to what the user was doing during their

session - and they readily respond to it. Also we can potentially ask more

probing questions as we are not under 'real time'pressure, and are less

concerned about leading the task orientated behaviour(because it has already

taken place!).

We have been using this method for over a year now with client work and have

been impressed with the results. But we wanted to get a more formal handle on

is so we have been working with the University of Lancaster in the United

Kingdom on validation on the methodology.

The most basic finding is that, unsurprisingly, talk aloud produces

significantly different behaviour as compared to more natural behaviour - as

evidenced by eyetrack records. But also preliminary findings indicate that PEEP

reveals significantly more usability problems than Think Aloud (F(1,11)=8.520,

p<0.014) (sample = 24). We will be publishing a paper on it later this year,

but your comments would be most welcome.

Regards

Jon Dodd and Robert Stevens

--

Dr Jon Dodd

Director - Bunnyfoot

jon@...

T: +44 (0)845 644 0650

F: +44 (0)845 644 0651

----------------------------------------------------------------

This message was sent using IMP, the Internet Messaging Program.

Hi Natalie,



Interesting and helpful thoughts. Thanks for sharing.

In our study we had modified the target link (shopping cart) in three different
ways: a) written in text (as a word), b) presented as an icon and, c) presented
both in text and as an icon. The position of the shopping cart was also modified
in three ways: a) top of page, b) left of page, c) right of page. Each
participant saw all three positions of the shopping cart but only in one of the
three presentation formats as described above.



Initially I thought that perhaps the shopping cart being presented as an icon
might be easier to be picked up by peripheral vision but after looking at the
data carefully I realised that even a couple of participants who were presented
with the shopping cart written in text (no icon) had been able to pick it up
without their gaze passing anywhere near by the target link. I am now looking at
the possibility of attributing this to the effect of 'iconic text'. So, for
example, perhaps the familiarity one has with certain written words might mean
that we perceive a written word as an icon rather than a word per se that we
read.



Moreover, I agree with you that the fact that the participants were asked to
find the shopping cart automatically builds on their expectation that there must
be a shopping cart on the screen, therefore they report having seeing it. But
they were asked to say where on the screen they have seen it too!



This also adds up to what Duchowski suggests. All our participants were
experienced internet users who had visited (completed transactions online
before) e-commerce sites before, thus -in theory- should have been familiar with
the notion of a shopping cart. That itself might be a factor that increases the
chances of observing the effect of peripheral vision in eye movement data. I am
tempted to agree with that as across a total of 5 eye tracking studies we
conducted as part of  our research programme, we have only noticed the
peripheral vision effect in the shopping cart study, so it might as well depend
on the nature of the task the participant is asked to complete, in the case of
the shopping cart, a task that many are expected to be familiar with.



By the way, when I use the term accuracy of task responses I refer to the
distribution of correct or wrong answers the participants gave to the task. So
when the participant reports that they have located the shopping cart on x point
on the screen and their eye movement data is not in line with their answer I
conclude they have 'seen' the cart but it has not picked up by the eye tracker
due to peripheral vision...



Overall, this is a very interesting topic. Thanks Natalie for the mail, it adds
up to my understanding, I hope I haven't complicated things for the rest.



Best wishes,



Katerina




________________________________

From: Eyetracking@yahoogroups.com on behalf of Natalie Webb
Sent: Thu 25/08/2005 10:42
To: Eyetracking@yahoogroups.com
Subject: [Eyetracking] Re: Hello


Hi Katerina,

The question you have is a very good one. And it's one we face in
our work as well; e.g. a client the other day questioned why eye
tracking is any good when people notice things outside the fixations
shown by a eyetracker.

My understanding of the role of peripheral vision is that it helps
to monitor the outer visual field and helps you to decide what to
next to focus on. It is good at seeing movement, but bad at colour
and acuity. You cannot clearly see objects; eg reading text cannot
be done using peripheral vision.

In your study you found that users were not fixating on the shopping
cart but reported they could see it.

Where was the shopping cart located? At the top of the page? I've
read objects are recognised about 3 degrees from the fixation point
(Duchowski, 2003) depending on how familiar the objects are. Was the
shopping cart a link or a picture?

Also could it be possible that users were expecting the shopping
cart to be on the page, so unmalicously reported they saw it when
they hadn't? Sort of post task "filling in the details"? What do you
mean by accuracy of task responses?

Cheers,
Natalie


--- In Eyetracking@yahoogroups.com, "e_katerina_tzandiou"
<E.tzanidou@o...> wrote:
>  Dear all,
>
> first of all many thanks to Natalie and Tony for organising such
an
> interesting workshop. I am looking forward to seeing you all in
> Edinburgh.
> My idea of communicating before the workshop has emerged after
> reading all the position papers. I can see that there are many
> topics for discussion and perhaps this forum could be a way to get
> us started.
> I'll throw a question regarding the effect of peripheral vision
that
> always comes to my mind when I am analysing eye movement data. I
> will be interested to hear your thoughts on this.
> In one of our recent studies we observed that users rarely looked
at
> the menu bar when we asked them to look for the shopping cart.
Their
> scan paths focused mainly on the middle left side of the screen.
It
> was interesting though that they were able to report having seen
the
> target link. This was confirmed by the accuracy of task responses
in
> terms of the position of the shopping cart on the screen.  This
> shows that these users don't look at the menu bar even when
> reporting finding links appearing on them. Peripheral vision
> obviously helped.
> Is this solely down to peripheral vision? How does one account for
> the role of peripheral vision in interpreting what users see?
> I am looking forward to hearing about your views on this.
>
> Cheers,
>
> Katerina




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________________________________

Hi Katerina,

The question you have is a very good one. And it's one we face in
our work as well; e.g. a client the other day questioned why eye
tracking is any good when people notice things outside the fixations
shown by a eyetracker.

My understanding of the role of peripheral vision is that it helps
to monitor the outer visual field and helps you to decide what to
next to focus on. It is good at seeing movement, but bad at colour
and acuity. You cannot clearly see objects; eg reading text cannot
be done using peripheral vision.

In your study you found that users were not fixating on the shopping
cart but reported they could see it.

Where was the shopping cart located? At the top of the page? I've
read objects are recognised about 3 degrees from the fixation point
(Duchowski, 2003) depending on how familiar the objects are. Was the
shopping cart a link or a picture?

Also could it be possible that users were expecting the shopping
cart to be on the page, so unmalicously reported they saw it when
they hadn't? Sort of post task "filling in the details"? What do you
mean by accuracy of task responses?

Cheers,
Natalie


--- In Eyetracking@yahoogroups.com, "e_katerina_tzandiou"
<E.tzanidou@o...> wrote:
>  Dear all,
>
> first of all many thanks to Natalie and Tony for organising such
an
> interesting workshop. I am looking forward to seeing you all in
> Edinburgh.
> My idea of communicating before the workshop has emerged after
> reading all the position papers. I can see that there are many
> topics for discussion and perhaps this forum could be a way to get
> us started.
> I'll throw a question regarding the effect of peripheral vision
that
> always comes to my mind when I am analysing eye movement data. I
> will be interested to hear your thoughts on this.
> In one of our recent studies we observed that users rarely looked
at
> the menu bar when we asked them to look for the shopping cart.
Their
> scan paths focused mainly on the middle left side of the screen.
It
> was interesting though that they were able to report having seen
the
> target link. This was confirmed by the accuracy of task responses
in
> terms of the position of the shopping cart on the screen.  This
> shows that these users don't look at the menu bar even when
> reporting finding links appearing on them. Peripheral vision
> obviously helped.
> Is this solely down to peripheral vision? How does one account for
> the role of peripheral vision in interpreting what users see?
> I am looking forward to hearing about your views on this.
>
> Cheers,
>
> Katerina

Dear everyone,

A warm welcome to the 'Commercial Uses of Eyetracking' online
discussion group. Thanks to Ekaterini for her suggestion of creating
this group.

The purpose of this group is really to provide an arena for
discussions and questions prior the workshop. Involvement is entirely
optional of course, but should provide a nice warm-up for the workshop
itself.

Any comments or questions please don't hesitate to let myself or Tony
know.

Best regards,
Natalie

Dear all,

first of all many thanks to Natalie and Tony for organising such an
interesting workshop. I am looking forward to seeing you all in
Edinburgh.
My idea of communicating before the workshop has emerged after
reading all the position papers. I can see that there are many
topics for discussion and perhaps this forum could be a way to get
us started.
I'll throw a question regarding the effect of peripheral vision that
always comes to my mind when I am analysing eye movement data. I
will be interested to hear your thoughts on this.
In one of our recent studies we observed that users rarely looked at
the menu bar when we asked them to look for the shopping cart. Their
scan paths focused mainly on the middle left side of the screen. It
was interesting though that they were able to report having seen the
target link. This was confirmed by the accuracy of task responses in
terms of the position of the shopping cart on the screen.  This
shows that these users don't look at the menu bar even when
reporting finding links appearing on them. Peripheral vision
obviously helped.
Is this solely down to peripheral vision? How does one account for
the role of peripheral vision in interpreting what users see?
I am looking forward to hearing about your views on this.

Cheers,

Katerina