Comparison of visual and vibration displays for finding spatial memory in Intelligent Space

We have proposed the spatial memory which is a human interface to operate iSpace agents such as mobile robots, computer displays, etc. Spatial memory enables users to store computerized information ranging from digital files and commands for robots in real space by assigning digital information to a three-dimensional position. Users can retrieve the information by pointing the locations using their own bodies directly. The accessed information will be delivered to a suitable iSpace agent who should execute it. We named information arranged into real space ldquoSpatial-Knowledge-Tagrdquo (SKT). In order to encourage people to share useful information via spatial memory, they need to retrieve pre-arranged SKTs which are arranged by somebody. In this paper, firstly we show possibility of finding SKTs through seeing other users´ actions, but not using any display to show locations and content types of SKT. Then, we present two kinds of displays to show users locations and content types of SKTs. Specifically, one is a visualization using computer graphics (we call ldquographical displayrdquo), the other is a display using vibration (we call ldquovibration displayrdquo). Experiments to compare the efficiency of the methods to find SKTs are shown.