多模态交互的车内即时通信应用可用性评价

Usability Evaluation of In-Car Instant Messaging Applications with Multimodal Interactions

针对多模态交互的车内即时通信应用,构建可用性评价模型,并基于评价结果提出优化建议.基于人机界面和可用性等领域的研究,确定了明确易操作、高效实用和安全的可用性原则,依次定义共15项评价指标,并创新性地搭建了实车模拟驾驶平台对3款汽车进行了可用性评价测试.结合层次分析法和CRITIC法,综合考虑主观意见和客观数据表现,动态地确定了各指标的权重,并应用模糊综合评价法建立了评价模型.在实车测试中发现了触屏交互引起的视觉和操作分心对安全性方面构成威胁,语音交互的任务完成时间直接影响用户的人机信任进而影响驾驶绩效等问题,并提出了优化建议.基于该实车模拟驾驶平台和评价模型,还可针对更多样的交互模态、交互任务和车机应用进行可用性测试与评价,并指导其体验设计.

Usability evaluation model was constructed for in-car instant messaging applications with multimodal interactions,and optimization suggestions were proposed based on evaluation results.With research in human-machine interface and usability,usability principles including“clear and easy to operate”,“efficient and practical”,and“safe”were determined,and 15 indexes were defined accordingly.Usability evaluation tests were conducted on three cars by building a real-vehicle driving simulation platform innovatively.Combining AHP and CRITIC method,index weights were determined dynamically by considering subjective opinions and objective data performance,and evaluation model was built by applying fuzzy comprehensive evaluation.Finally,problems such as visual and manual distraction caused by touch-screen interaction negatively affecting safety,and task completion time of voice interaction directly affecting user trust and thus driving performance,etc.were identified,and targeted design suggestions were put forward.The real-vehicle driving simulation platform and evaluation model can be used to test the usability of and evaluate more interaction models,tasks and infotainment applications,and thus guide experience design.