[ACT-R-users] ACT-R virtual presentation

[John Anderson]

If you are like me, you have already gotten too many of these 
announcements about this presentation, but in case you don't let me 
point out the following announcement:

At 2:40 PM +0000 2/18/03, The Cognitive Science Society wrote:
>Virtual Colloquium Series
>
>February 17, 2003
>
>Dear Member,
>
>The Cognitive Science Society is hosting a 2002-2003 virtual colloquium
>series presented live via the Internet, with the with the fourth talk given
>by Dr. John Anderson. Register now to attend:
>www.ctaresource.com/CognitiveScience.
>
>Time: Friday February 28, 2003
>1:00pm US Eastern Standard Time
>
>Presenter: Dr. John Anderson
>Carnegie Mellon University, Department of Psychology
>
>Topic: Use of a Cognitive Architecture and fMRI to Mutually inform Each
>Other or A Tale of Three Buffers
>
>We will describe the interaction between cognitive modeling and brain
>imaging.  Two fMRI studies will be described.  The first was concerned with
>the solution of algebraic equations. We tried to relate the brain regions
>discovered to components of a prior ACT-R model that had been developed.  A
>left posterior parietal region corresponded to the behavior of a module in
>ACT-R that maintains an image of the equation and performs mental
>transformations on it.  A left prefrontal region corresponded to the
>behavior of a module that retrieves relevant information such as arithmetic
>facts.  A left motor region corresponded to the behavior of module that
>programs hand movements. We will describe how we were able to fit precisely
>the BOLD functions obtained from these regions given the operation of the
>ACT-R model. To show that these regions were not specific to mathematics and
>to turn our model-fitting exercise from postdiction to prediction we
>performed a second study using a more abstract symbol-manipulation task. The
>model fits were equally good if not better, although we had to adjust our a
>priori rehearsal assumptions. The second study identified an anterior
>cingulate particle whose behavior appears to correspond to the conflict
>resolution process in ACT-R. This research illustrates profitable back and
>forth that is possible between brain imaging and cognitive modeling. The
>basic methodology can be applied to help shape any information processing
>architecture, not just ACT-R.
>
>Further information about this talk, the colloquium series, a schedule of
>future talks, and an archive of previous talks are available at
>http://www.cognitivesciencesociety.org/colloquium
>
>Contact Janet Morrow, cta at aptima.com with any questions about registration
>for this seminar.
>
>Please forward this invitation to colleagues who would benefit from this
>seminar or the series.
>
>This series is sponsored by the Office of Naval Research.
>
>Sincerely,
>Art Markman
>markman at psy.utexas.edu
>
>Dr. Arthur B. Markman
>University of Texas
>Department of Psychology
>Austin, TX 78712
>512-232-4645
-- 

==========================================================

John R. Anderson
Carnegie Mellon University
Pittsburgh, PA 15213

Phone: 412-268-2788
Fax:     412-268-2844
email: ja at cmu.edu
URL:  http://act.psy.cmu.edu/