[ACT-R-users] Production satiation (UNCLASSIFIED)

[Ion Juvina]

here is my 2 cents: a production's utility decreases when that  
production fires frequently in a sequence of productions that leads  
to very small rewards. so, all we need to do is make sure we have a  
"competitive" production there, that is, a production that  
contributes to getting higher rewards.

example: a "ride-a-bike" production could lose the competition in  
favor of a "drive" production if the environment favors speed and  
safety. however, the "ride-a-bike" production can still win when the  
environment favors health and losing-weight criteria.

ion






On May 15, 2007, at 10:15 AM, Kelley, Troy ((Civ,ARL/HRED)) wrote:

> Classification:  UNCLASSIFIED
> Caveats: NONE
>
> ACT-R users,
>
> I was wondering, and I have never heard of this, if there a concept  
> of production satiation in ACT-R, or someway to implement such a  
> concept?  This seems to be a common problem in ACT-R where a  
> production will continue to fire over and over and it is difficult  
> to stop.  I understand that the solution is to change the  
> activation of a chunk so that something else will match, but this  
> is difficult to accomplish when the matching chunk keeps increasing  
> in activation, thus causing more matches.  I remember a few ACT-R  
> workshops back that someone, I think Richard Young, presented the  
> idea of a production refractory period, and I was wondering if this  
> idea has ever gained any ground?  Or are there other ideas of  
> satiation within ACT-R?  I am asking this because we are having  
> trouble with our robot performing the same productions over and  
> over.  Again, I understand that we need to activate other chunks to  
> cause a different match, but the question is - Where does this  
> increased activation come from?  Is this a meta-cognitive  
> function?  If there are no “new” stimuli from the outside, what  
> triggers an increase in activation?
>
> Troy D. Kelley
> US Army Research Laboratory
> Human Research and Engineering Directorate
> AMSRD-ARL-HR-SE
> Aberdeen, MD, 21005-5425
> Ph: 410-278-5869
> FAX: 410-278-9523
>
>
>
> Classification:  UNCLASSIFIED
> Caveats: NONE
>
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