Vibro-tactile and visual asynchronies: Sensitivity and consistency

被引:26
|
作者
van Erp, JBF [1 ]
Werkhoven, PJ [1 ]
机构
[1] TNO, Human Factors, NL-3769 ZG Soesterberg, Netherlands
关键词
D O I
10.1068/p5014
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
We investigated the consistency between tactually and visually designated empty time intervals. In a forced-choice discrimination task, participants judged whether the second of two intervals was shorter or longer than the first interval. Two pulses defined the intervals. The pulse was either a vibro-tactile burst presented to the fingertip, or a foveally presented white square. The comparisons were made for uni-modal and cross-modal intervals. We used four levels of standard interval durations in the range of 100-800 ms. The results showed that tactile empty intervals must be 8.5% shorter to be perceived as long as visual intervals. This cross-modal bias is larger for small intervals and decreases with increasing standard intervals. The Weber fractions (the threshold divided by the standard interval) are 20% and are constant over the standard intervals. This indicates that the Weber law holds for the range of interval lengths tested. Furthermore, the Weber fractions are consistent over uni-modal and cross-modal comparisons, which indicates that there is no additional noise involved in the cross-modal comparisons.
引用
收藏
页码:103 / 111
页数:9
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