Understanding the Tradeoffs of Mobile Device Output Modalities in Just-in-time Learning of Mechanical Tasks

摘要: Paper-based user manuals that provide assembly and disassembly instructions often do so with a combination of diagrams supported textual information clarifies how to perform the tasks. Mobile devices are emerging as multimedia platform for providing on-demand training due their portability. have limited screen size; result, text associated can produce clutter occlusion on screen. Also, too much if fed through single sensory channel (visual) may result in excessive cognitive load working memory, thus hindering learning process. In this paper, we present study conducted investigate tradeoffs using text, audio, both modalities experience just-in-time mobile scenario. such scenario end-users managing two very visual tasks at same time; i.e., primary task carrying out assembly/disassembly job secondary task. We found participants were most efficient mechanical computer when they had audio support device. Both novice expert felt introduction decreased amount time spent by them looking (visual attention) while