Shimizu Y, Frost B J
Industrial Products Research Institute, Ibaraki, Japan.
Percept Mot Skills. 1990 Aug;71(1):195-8. doi: 10.2466/pms.1990.71.1.195.
The effect of stimulus orientation of letters presented either visually or vibrotactually was examined to obtain basic information on sensory substitution using the tactile sense. The reaction time (RT) to identify the letters F and R presented in normal or mirror-image form at four orientations each was measured. In addition, conditions of 0 degree and 270 degrees of head rotation from vertical and arm rotation from the midline axis were employed. Data from 5 trained subjects showed that vibrotactile RTs were always longer than visual RTs. Stimulus rotation away from normal orientation increased visual RTs significantly but not vibrotactile RTs. Visual orientation effect then seemed to be determined by the body-coordinate system but not the vibrotactile orientation. Although further studies are warranted, from the results of this experiment, any convenient and constant stimulus orientation could be used with a wearable vibrotactile display system to exploit passive touch.
研究了以视觉或振动触觉方式呈现字母时刺激方向的影响，以获取有关使用触觉进行感官替代的基本信息。测量了在四种方向上以正常或镜像形式呈现的字母F和R的识别反应时间（RT）。此外，采用了头部从垂直方向旋转0度和270度以及手臂从中线轴旋转的条件。来自5名训练有素的受试者的数据表明，振动触觉反应时间总是比视觉反应时间长。刺激方向偏离正常方向会显著增加视觉反应时间，但不会增加振动触觉反应时间。视觉方向效应似乎由身体坐标系决定，而不是由振动触觉方向决定。尽管有必要进行进一步研究，但从本实验结果来看，任何方便且恒定的刺激方向都可与可穿戴振动触觉显示系统一起使用，以利用被动触觉。
