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In the area of financial decision making it is more and more acknowledged that psychological states and characteristics play an important role, for example feeling insecure in relation to financial risks, and being greedy in relation to opportunities to obtain serious gains. This paper presents an agent model of human decision making behaviour in economic situations, incorporating a human's greed...
To endow virtual agents with more realistic affective behavior, the notion of expectation-based emotions plays an important role: emotional states of agents should not only be triggered by present stimuli, but also by anticipation on future stimuli, and evaluation of past stimuli in the context of these anticipations. Within this study, an extension of the belief-desire-intention (BDI) model with...
Interobserver reliability and reproducibility are well known problems in experimental research within the social and behavioural sciences. We propose the use of formal techniques and tools to reduce this problem. To this end we extend standard research methods by transcribing video material in terms of basic score units, using automated tools to define in logic the more complex score units in terms...
This paper describes the development and validation of a dynamic multi-agent model to simulate social learning of adolescence-limited criminal behaviour. The parameters of the agent model have been calibrated using real-world data that has been collected in a large study. In addition, a measure for correctness has been developed. The validation shows that the developed model predicts delinquency substantially...
In order to endow virtual agents with more realistic affective behavior, it is important to provide them not only the capability to generate and regulate emotions, but also the ability to reason about the emotion regulation processes of other agents. To this end, this paper introduces a computational model for a theory of emotion regulation (ToER). The model has been implemented and tested using the...
This paper presents an agent model of the dynamics of a humanpsilas functional state in relation to task performance and environment. It can be used in agent systems that support humans in demanding circumstances. Simulation experiments under different parameter settings pointed out that the model is able to produce realistic behaviour of different types of personalities. Moreover, by a mathematical...
Within criminology, the process of crime displacement is usually explained by referring to the interaction of three types of agents: criminals, passers-by, and guardians. Most existing simulation models of this process are agent-based. However, when the number of agents considered becomes large, population-based simulation has computational advantages over agent-based simulation. This paper presents...
Emotion regulation describes how a subject can use certain strategies to affect emotion response levels. Usually, models for emotion regulation assume mechanisms based on feedback loops that indicate how to change certain aspects of behaviour or cognitive functioning in order to get a more satisfactory emotion response level. Adaptation of such feedback loops is usually left out of consideration....
Virtual storytelling often uses a fixed, pre-scripted storyline, constraining the characters' autonomy and behaviour. An agent-based approach provides possibilities of a narrative emerging from interaction between a number of autonomous characters. In this paper such an approach is proposed, based on autonomous virtual agents that have mindreading capabilities. The approach is applied to generate...
This paper introduces an executable coordination specification language, with which both pre-specified and more flexible and generic agent coordination approaches can be expressed. An iterative process was taken to define this language. First, useful language elements were defined, after which example coordination approaches were specified using this language. The language was extended incrementally...
Traditionally, product models often have a rigid nature, both with respect to the manner in which they are initially tailored to clients, and to the way they are maintained over time. Especially when such products are offered at a highly interactive medium such as Internet in the form of Web services, addressing such aspects might be a necessity to obtain a competitive advantage. To cope with these...
Comprehending and verifying agent system behavior is an arduous task when dealing with complex multi-agent systems whose behaviors are sophisticated. This paper presents an approach resulting from collaboration between the Tracer Tool and the TTL Checker, which together automate the analysis and verification of an implemented system's behavior, with the aim of aiding the user in redesigning, debugging,...
Within many domains, among which biological and cognitive areas, multiple interacting processes occur among agents with dynamics that are hard to handle. Current approaches to analyse the dynamics of such processes, often based on differential equations, are not always successful. As an alternative to differential equations, this paper presents the predicate logical temporal trace language (TTL) for...
In this paper a cognitive model for visual attention is introduced. The cognitive model is part of the design of a software agent that supports a naval warfare officer in its task to compile a tactical picture of the situation in the field. An executable formal specification of the cognitive model is given and a case study is described in which the model is used to simulate a human subject's attention...
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