仮想物体の変形に対する視触覚間同時性知覚の順応(人工現実感及び一般)

概要

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Simultaneity of signal inputs into different sensory modalities seems to be important for human to act in virtual environment. However, complete simultaneity as in a real world may be difficult to be realized in a virtual environment. In such case, it is desirable that human can compensate the temporal delay of inputs. Here, we investigate the human ability of vision-haptics adaptation for temporal delay by using psychophysical methods. In the adaptation phase, subjects experienced visually and haptically deformation of virtual object with a fixed visual-haptic temporal lag (+/- 250 or 0 ms). In the following test phase, the same stimulus was presented with variable lag and subjects judged whether visual and haptic deformations occurred simultaneously. the results showed that the PSS (i.e., the mean of psychometric function) was shifted toward the adapted lag by 10-20 ms. In the experiment 2, we tested whether the adaptation alter the PSS between vision and the opposite hand (i.e. right hand adaptation and left hand test, and vice versa). The results showed no aftereffect of adaptation, suggesting that the adaptation of simultaneity does not occur between visual- and haptic-time, but is closed in the body parts and vision.
社団法人電子情報通信学会の論文
2007-05-28