[ACT-R-users] Production selection

[Andrea Macklem]

Hello everyone,

I am new to this mailing list and to working with ACT-R 
models.  I am a master’s student doing my research in 
validation and verification techniques for cognitive models.  
I have decided to write my own model to reference in my paper 
for illustration of my V&V methods.   This is where my 
question comes in.

I have a question regarding a model I am creating to solve 
the Tower of Hanoi problem.  At one point I have three 
productions (with the same utility) that can be fired.  I 
would like the selection of the production to be random 
(since all three have equal utilities at this point).  
However, when I step through my model it always selects the 
first production to fire each time.  How can I make the 
selection between the three completely random?

Any pointers to help achieve this randomness would be greatly 
appreciated!

Thanks,
Andrea Macklem
Oakland University