The PEACTIDM Model
The PEACTIDM model (as laid out in section 5.3.2 of Allen Newell's
book Unified Theories of Cognition, and as interpreted by
us) is a model for immediate behavior which provides one hypothesis
for a way to model extensive interaction with the outside world.
Because this model appears to work well with chunking, and accounts
for certain timing data, it seemed appropriate to use it in revising
the NTD simulation to run with learning on.
We have tried to be faithful to this model by forcing all operators
that are selected in the top space to fit into one of the operator
categories outlined by this work. Specifically, there are four kinds
of operators, which appear in various ways within our model:
Each of these operators has a specific, reasonably well delineated set
of functions, and all operators fall into one of these categories.
Because all interaction with the world is being done from the top
space, non-contemporaneous chunking and other difficult I/O problems
are much more readily avoided.