普适计算的人机交互框架研究

Study on Human-Computer Interaction Framework of Pervasive Computing

普适计算通过向用户提供透明的计算服务使其注意力回归到任务本身 .它正在逐步发展成主流的计算模式 .人机交互的效率和自然性是影响其发展的关键因素之一 .文章从认知心理学的角度分析了用户在普适计算环境中的认知特征 ,论证了人类有限的认知是普适人机交互中的瓶颈 ,计算系统的交互模式必须适应用户的认知特征 .据此提出了普适计算模式的Multimodal+Context sensitive交互框架 ,对上下文信息和用户多通道主动输入信息进行无缝融合 .作者将其在移动导游导航系统TGH中加以实现 .用户评测结果初步证明该框架对于提高普适计算人机交互效率和自然性具有良好的效果 .

Pervasive/Ubiquitous computing is emerging as an exciting new computing paradigm with the objective to provide computations everywhere at any time. It poses great challenge for current human computer interaction model. In this paper, the traditional user-driven interaction framework, in which human computer interaction exclusively depends on user's explicit input, is theoretically proved to be unsuitable for pervasive computing based on the analysis of characteristics of this new paradigm not only from the level of computing technology, but also user's cognitive behavior and psychology. Attention allocation of users essentially requires the computing systems to be more active, and the modality conflict needs more natural and flexible facilities. An interaction framework, in which the implicit knowledge extracted from context is seamlessly integrated with the explicit user input from multiple modalities, is then proposed to meet such requirements. It can be also regarded as an interaction design model for pervasive applications. Authors implement this framework in a mobile guide system TGH and evaluate its performance. The results show that this framework improves the naturalness and efficiency of interaction in pervasive computing.