System dialog messages are often troublesome for mobile users. In this study, behavioral experiments were conducted on 18 younger (age; 24.7 ± 1.7) and 18 older (63.8 ± 2.0) age groups using mobile devices. In the experiment, system dialog messages were popped up on a smartphone as an interruption in the task switching process, and which attributes of the dialog messages (the amount of jargon and length of the message) significantly affected the performance of the whole task switching process was observed. The results showed that the younger participants did not show significant differences in their task switching performance according to the attributes of the dialog message. However, the older participants showed increased task performance time for the interruption task with extensive jargon. Furthermore, the older participants also revealed difficulty transferring information as they resumed the primary task just after processing the interrupting dialog messages, suggested by correlations between temporal and subjective workload responses. Based on the analysis results, we proposed some guidelines to design system dialog messages for older mobile device users.

系统对话框消息通常对移动用户造成麻烦。在这项研究中，使用移动设备对18个年龄较小的年龄段（24.7±1.7）和18个年龄较大的年龄段（63.8±2.0）进行了行为实验。在实验中，系统对话消息作为任务切换过程的中断而在智能手机上弹出，并且对话消息的哪些属性（行话的数量和消息的长度）显着影响了整个任务切换过程的性能被观测到。结果显示，根据对话消息的属性，年轻参与者的任务切换性能没有显着差异。但是，年龄较大的参与者表现出用大量的术语增加了中断任务的任务执行时间。此外，年龄较大的参与者在处理中断的对话消息后立即恢复主要任务时，也发现传递信息的困难，这是由时间和主观工作量响应之间的相关性暗示的。根据分析结果，我们提出了一些指导原则，以为较老的移动设备用户设计系统对话消息。