[ACT-R-announce] Change in Utility learning mechanism

[John Anderson]

While everyone is invited to read my paper with Wai-Tat, it actually 
describes a more complex mechanism than the one implemented.   I 
would suggest the tutorial and/or new-utility.doc for discussion of 
the mechanism that has been made default.   It will also be described 
in my forthcoming boo.


At 3:43 PM -0500 12/11/06, Dan Bothell wrote:
>The new Utility learning mechanism which John presented at
>the last Workshop and which was taught during the last
>Summer School is going to become the default mechanism
>in ACT-R 6.
>
>When the next version of the software is made available on
>the ACT-R web site in mid-January it will have the new
>mechanism active by default.  The old mechanism will still
>be included as an option, but will not be loaded by default.
>
>Information about the new mechanism can be found in John's
>talk "A New Utility Learning Mechanism" from the last ACT-R
>Workshop and in the paper:
>
>Fu, W-T. & Anderson, J. R. (2006). From recurrent choice to
>skill learning: A reinforcement-learning model. Journal of
>Experimental Psychology: General, 135(2), 184-206.
>
>The paper is available from the ACT-R web site:
><http://actr.psy.cmu.edu/publications/pubinfo.php?id=684>
>
>It is also described in documents available with the currently
>available version of ACT-R 6 in the extras/new-utility
>directory.  There you will find a file called new-utility.doc
>and updated ACT-R tutorial units and models which use the
>new mechanism.
>
>For those getting the ACT-R files through Subversion,
>as of r332, the change has already taken place.  The new
>utility module is in place as are the corresponding new
>tutorial units and models.  The old Utility module and the
>units/models that go with it are still available as an
>alternative in the extras/old-utility directory.
>
>If you have any questions or concerns about the change
>please let me know.
>
>Dan
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-- 

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

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/