[ACT-R-users] ACT-R Learning Mechanisms

[sima najafi]

Dear All,
  I have A question about ACT-R Learning Mechanisms.
what i found till now has been the production compilation mechanism combining several existing rules into one. but i am looking for  a mechanism to learn rules based on facts in the declarative memory specially in the first phase where no rules exist.
is there any mechanism?
Thanks 


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