Subtle Expressivity by Relational Agents
Subtle Expressivity by Relational Agents
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关系代理的微妙表达
DOI:
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发表时间:
2003
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影响因子:
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通讯作者:
Rosalind W. Picard
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作者:
T. Bickmore;Rosalind W. Picard
Relational agents are computational artifacts designed to build long-term, social-emotional relationships with their users. In this paper we argue that subtle expressivity is especially crucial in human-computer interactions with relational agents in which social tasks such as relationship building or negotiation are being performed. We discuss these issues in the context of a relational agent designed to interact repeatedly with users during a one-month exercise adoption program. 1. RELATIONAL AGENTS Over the last three years we have begun investigating the development and use of Relational Agents; computational artifacts designed to build and maintain long-term, social-emotional relationships with their users (Bickmore, 2003). These can be purely software humanoid animated agents, but they can also be non-humanoid or embodied in various physical forms, from robots, to pets, to jewelry, clothing, hand-held, and other interactive devices. Central to the notion of relationship is that it is a persistent construct, spanning multiple interactions, thus Relational Agents are explicitly designed to remember past history and manage future expectations in their interactions with users. Finally, relationships are fundamentally social and emotional, and detailed knowledge of human social psychology-with a particular emphasis on the role of affect-must be incorporated into these agents if they are to effectively leverage the mechanisms of human social cognition in order to build relationships in the most natural manner possible. Human relationships are primarily established in the context of face-to-face conversation. In addition to primacy of this interactional modality, face-to-face conversation affords many channels of subtle expressivity that are especially crucial in relational conversation. Thus, we have focused on developing relational agents that have anthropomorphic forms, implemented as embodied conversational agents (Cassell, Sullivan, Prevost, & Churchill, 2000)or sociable robots (Breazeal, 2002). The social and subtly expressive communicative cues used by these agents are gleaned from studies of human-human face-to-face conversation. 2. SUBTLE EXPRESSIVITY IN HUMAN RELATIONAL INTERACTIONS Several studies have demonstrated what most business people already know: when the social aspects of an interaction are especially important-such as when you are getting to know a new client or negotiating an important deal-nothing beats face-to-face interaction. In a review of studies comparing video and audio-mediated communication, Whittaker and O'Conaill concluded that video was superior to audio only for social tasks while there was little difference in subjective ratings or task outcomes in tasks in which the social aspects were less important (Whittaker & O'Conaill, 1997). They found that for social tasks, interactions were …