Abstract
It is necessary to know how accurately humans can react to sensory stimulation in order to construct a virtual reality system. The motion induced by the sensory stimulation is called ‘sensory-motor coordination.’ We have been investigating the accuracy of gazing and indicating movements to the target such as a flashlight presented around subjects without seeing their arm to analyze the mechanism of the sensory-motor coordination. In this report, the angle error between the indicated angle and the target angle was measured as a function of the target angle. The targets were placed in working space with the distance of 0.5 meter from a subject to the targets and out of extraworking space with the distance of 1.5 meter. From the responses to the target at the distance of 0.5 meter, the degree of the angle error was ascertained to increase in the peripheral area, especially at 80 degrees and the indicated angle inclined to center. From the responses to the target at the distance of 1.5 meter, all indicated angle's responses shifted to the outside compared with the responses of 0.5 meter. We discussed how the virtual reality systems should be constructed based on these findings.
