ACT-R 4.0b3

[Christian J Lebiere]

A new beta version, ACT-R 4.0b3, is available on the ACT-R web site:

http://act.psy.cmu.edu

The main change from ACT-R 4.0b2 is that it integrates the variant of
the analogy mechanism discussed in the future of ACT-R session of the
workshop.  Essentially, it still constructs productions from
dependencies in the same way.  But instead of trying to select a
dependency that matches the current goal and trying to analogize in
parallel with the conflict resolution process, a new analogized
production is created from a dependency when that dependency is popped
off the stack.  A resulting simplification is that the global parameters
Enable Analogy (:ea) and Analogy Strength (:as) are now obsolete and
have been removed.  Generally, the application of the new mechanism is
pretty straightforward.  Two examples are included: addition and
equation.

See the Notes for more details, and let me know if you have any question,

Christian