Opening the black box of trust: reasoning about trust models in a BDI agent
Publication Type:
Journal ArticleSource:
Journal of Logic and Computation, Oxford University Press (In Press)Abstract:
Trust models as thus far described in the literature can be seen as a monolithic structure: a trust model is provided with a variety of inputs and the model performs calculations, resulting in a trust evaluation as output. The agent has no direct method of adapting its trust model to its needs in a given context. In this article, we propose a first step in allowing an agent to reason about its trust model, by providing a method for incorporating a computational trust model into the cognitive architecture of the agent. By reasoning about the factors that influence the trust calculation the agent can effect changes in the computational process, thus proactively adapting its trust model. We give a declarative formalization of this system using a multi-context system and we show that three contemporary trust models, BRS, ReGReT and ForTrust can be incorporated into a BDI reasoning system using our framework.
Towards a Normative BDI Architecture for Norm Compliance.
Publication Type:
Conference PaperSource:
11th International Workshop on Coordination, Organization, Institutions and Norms in Multi-Agent Systems (COIN@MALLOW2010), Lyon, France, p.65-81 (2010)Abstract:
Multi-AgentSystems require coordination mechanisms in order to assemble the behaviour of autonomous and heterogeneous agents and achieve the desired performance of the whole system. Norms are deontic statements employed by these coordination mechanisms which define constraints to the potential excesses of agents’ autonomous behaviour. However, norms are only effective if agents are capable of understanding and managing them pragmatically. In this paper, we propose an extension of the BDI proposal in order to allow agents to take pragmatic autonomous decisions considering the existence of norms. In particular, coherence and consistency theory will be employed as a criterion for determining norm compliance.
Coherence as an Inclusive Notion of Rationality
Publication Type:
Conference PaperSource:
Artificial Intelligence Research and Development. Proceedings of the 12th International Conference of the Catalan Association for Artificial Intelligence, IOS Press, Volume 202, Cardona, Catalonia, Spain, p.224-233 (2009)ISBN:
978-1-67050-061-2Keywords:
Coherence; RationalityAbstract:
We propose utility coherence graphs along with coherence maximisation based on Thagard's theory of coherence as an alternative to utility functions to model rational behaviour of agents. We show that the traditional behaviour of utility functions can be emulated using our approach and prove that \emph{the maximum element of a preference ordering is the same as that found by coherence maximisation over a corresponding utility coherence graph}. We argue that utility coherence graphs have marked advantages over utility functions, in that they blend well with the internal representation and reasoning of cognitive agents, and in that they can model the dynamism and uncertainty inherent in the rational behaviour of agents. We illustrate this by modeling the prisoner's dilemma with a utility coherence graph.
Pragmatic-Strategic Reputation-Based Decisions in BDI Agents
Cognitive Social Evaluations for Multi-Context BDI Agents
Integrating Image and Reputation Information in BDI Agents
A Tourism Recommender Agent: from theory to practice
Work Proximity on Interrelated Coauthoring Production
