Use this URL to cite or link to this record in EThOS:
Title: Simulated emotions and mood as part of decision making in a mobile agent society
Author: Collenette, Joe
ISNI:       0000 0004 8506 3595
Awarding Body: University of Liverpool
Current Institution: University of Liverpool
Date of Award: 2020
Availability of Full Text:
Access from EThOS:
Access from Institution:
This thesis explores cooperation among self-interested agents that use simulated emotions and mood as part of their decision making. The thesis begins by analysing the psychology literature on emotions and mood, and the models developed. A discussion follows that shows the inherent difficulties in developing these models so that they can be used by computational agents. The first set of experiments shows how a society of emotional agents are affected by the introduction of mobility, in terms of cooperation in the Prisoner's Dilemma and the effects on which emotional characteristics are successful when compared to previous implementations. The thesis also introduces a new computational model of mood which is demonstrated in two separate implementations. Both implementations are tested in the Prisoner's Dilemma and show improvements in cooperation when compared to the equivalent implementation that does not use the model of mood, where the agents implementing these models are placed in mobile environments. The experiments augment the previous findings that mobility and the environment structure has an an effect agents. The next set of experiments in the thesis highlighted that mobility reduces the level of cooperation and increases convergence times towards cooperation for the agents. The more open the arena, the more impact the effect of mobility has on the agents. The average scores were noted to only be impacted when the payoff matrix supports this effect. An Evolutionarily Stable Strategy analysis was conducted on the emotional and moody agents that have been implemented. Emotional agents can be considered stable when allowed time to interact with their neighbours. Moody agents were shown not to be stable. The stability of the emotional agents came at the cost of cooperation, as the ability of moody agents to create cooperation creates the risk that cooperation will not be reciprocal. In conclusion, the thesis has showed that self-interested emotional and moody agents are able to be both competitive and cooperative in environments where mobility exists.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral