VORTRAG
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Oesterreichisches Forschungsinstitut fuer Artificial Intelligence(OFAI)
Freyung 6/6, A-1010 Wien
Tel.: +43-1-53361120, Fax: +43-1-5336112-77, Email: sec@ofai.at
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Dr. Peter Wallis
Natural Language Processing Research Group
Department of Computer Science
Sheffield University
BDI AS FOLK PSYCHOLOGY: A MORE REALISTIC APPROACH
TO PLANNING BASED ON GOAL TAGGED ACTIVITIES
The Beliefs, Desires and Intention (BDI) architecture was initially
designed to balance reactive and deliberative behaviour in autonomous
agents. It has also found an important role as a basis for modeling
human behaviour. Based on folk psychology, BDI agents do what they
believe is in their interests. This is common sense to us humans -
something computers don't normally have - and something we simply
expect when dealing with apparently rational agents. As such, BDI
provides an excellent basis for synthetic characters in computer games
(Black & White) for "pucksters" in military training (Goss et al) and
actors in social simulations (Norling). BDI provides a system with
intentional behaviour, but there is more to our folk understanding of
other people. Norling and Ritter extend the model to include
attention and timing constraints, de Rossis has included emotion with
the BDI&E model, and models of sensing and representation have been
added (Norling). In this talk I discuss a further improvement that
provides a better model of human planning. In the classic GOFAI
approach, planning "bottoms out" at atomic actions. When playing
chess, a primitive action is to move a piece. In playing snooker,
a primitive action is to strike the white ball with the cue. In the
case of riding a bicycle however, the model breaks down. Riding a bike
is more like the interaction of a diesel engine and it's governor - to
view it as sensing and acting is to miss the time-extended nature of
the process. The robotics community has generally embraced a behaviour
based model in which behaviours "just happen". Rather than using
GOFAI plans in a BDI plan library, I advocate using a library of
"activities" tagged with the goals they might achieve. These
activities can be quite high level, and indeed can be social. The
proposal is that chatting with the priest, a policeman, or mates in
the pub, are all activities we "just do" with minimal planning.
An open question is whether this cognitive architecture can provide
the bridge between the working of human minds and the reality of human
behaviour in a social environment.
Dr. Wallis is currently visiting OFAI in the framework of the Network
of Excellence HUMAINE (Human Machine Interaction on Emotions), funded
by the European Commission.
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Zeit: Donnerstag, 24. August 2006, 18:00 Uhr pktl.
Ort: Oesterreichisches Forschungsinstitut
fuer Artificial Intelligence, OFAI
Freyung 6, Stiege 6, 1010 Wien.
OESTERREICHISCHES FORSCHUNGSINSTITUT
FUER ARTIFICIAL INTELLIGENCE
o.Univ.-Prof. Ing. Dr. Robert Trappl
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