Trust is a judgement of unquestionable utility — as humans we use it every day of our lives. However, trust has suffered from an imperfect understanding, a plethora of definitions, and informal use in the literature and in everyday life. It is common to say “I trust you, ” but what does that mean? This thesis provides a clarification of trust. We present a formalism for trust which provides us with a tool for precise discussion. The formalism is implementable: it can be embedded in an artificial agent, enabling the agent to make trust-based decisions. Its applicability in the domain of Distributed Artificial Intelligence (DAI) is raised. The thesis presents a testbed populated by simple trusting agents which substantiates the utility of the formalism. The formalism provides a step in the direction of a proper understanding and definition of human trust. A contribution of the thesis is its detailed exploration of the possibilities of future work in the area. Summary 1. Overview This thesis presents an overview of trust as a social phenomenon and discusses it formally. It argues that trust is: • A means for understanding and adapting to the complexity of the environment. • A means of providing added robustness to independent agents. • A useful judgement in the light of experience of the behaviour of others. • Applicable to inanimate others. The thesis argues these points from the point of view of artificial agents. Trust in an artificial agent is a means of providing an additional tool for the consideration of other agents and the environment in which it exists. Moreover, a formalisation of trust enables the embedding of the concept into an artificial agent. This has been done, and is documented in the thesis. 2. Exposition There are places in the thesis where it is necessary to give a broad outline before going deeper. In consequence it may seem that the subject is not receiving a thorough treatment, or that too much is being discussed at one time! (This is particularly apparent in the first and second chapters.) To present a thorough understanding of trust, we have proceeded breadth first in the introductory chapters. Chapter 3 expands, depth first, presenting critical views of established researchers.

This paper gives HRTF magnitude data in numerical form for 43 frequencies between 0.2---12 kHz, the average of 12 studies representing 100 different subjects. However, no phase data is included in the tables; group delay simulation would need to be included in order to account for ITD. In 3-D sound

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Encouraging creativity is an important part of a child’s education and often not adequately supported by outdoor school environments. Contemporary playgrounds are designed in response to perceptions of liability and a limited interpretation of child development. Prefabricated plastic constructions

Multiplayer online games are engineered to be highly engaging. Their success is reflected in the nearly 20 million participants, including roughly 5 million adolescents and children, who often play as much as 20 hours per week. A central question for this paper is whether players are deeply engaged

This study explores the complicated social interactions related to gender that take place at school recess. Using grounded theory methodology and a social constructionist perspective, the researchers observed 67 recesses in New England and then examined the data to deter-mine which themes emerged

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[An examination of collaborative practice in partially improvised works] A portfolio and commentary submitted for the degree of

by the authors, “Auslan Kids, ” in order to test and evaluate the efficacy of multimedia in learning language particularized by visual representation. Of particular interest to the authors was the influence of characters and interaction styles on learning outcomes. Kindergarten children managed to learn