Abstract
This paper proposes the spatial memory as an interface between human and intelligent space (iSpace). The spatial memory regards three-dimensional space as mass storage of computers, i.e. three-dimensional point is treated as an address of stored digital data such as various documents, images and commands for machines. Consequently, we can access stored digital data by indicating a point using our own arms, which we named "human indicator". In this paper, we implement a prototype of the spatial memory system which is supposed to utilize digital data regarded as externalized knowledge. The implemented system is evaluated through two types of experiments. The tendency to forget and the efficiency of task performance are investigated. By applying the t-test under the level of significance 5%, experimental results of the performance efficiency show significant statistical difference between the results with the spatial memory and without it.
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