感觉替代装置(SSD)通过增强触摸和/或听觉能力来促进环境信息的检测。研究表明,使用声学可以成功完成几项任务,振动触觉,和多模式设备。替代模态的适用性也由执行特定任务所需的信息类型来调节。本研究通过使用感觉替代手套测试了抓握任务中触觉和听觉的充分性。替代模式告知,通过增加刺激强度,手指和物体之间的距离。进行了幅度估计的心理物理实验。40名蒙住眼睛的参与者对触觉和声音刺激的强度进行了等同的区分,尽管他们在更强烈的刺激下经历了一些困难。此外,涉及不同直径的圆柱形物体的抓取任务,进行距离和方向。30名被蒙住眼睛的参与者被分成振动,声音,或多模式组。实现了高性能(84%的正确掌握),两组之间的成功率相同。运动变量在多峰条件下显示出更高的精度和置信度。通过问卷调查,多模态组表示他们更愿意在日常生活中使用多模态SSD,并将振动确定为他们的主要刺激源.这些结果表明,专用SSD的性能有所提高,当任务的必要信息被识别并与所传递的刺激耦合时。此外,结果表明,当满足这些先前的步骤时,有可能在替代模式之间实现功能对等。
Sensory substitution devices (SSDs) facilitate the detection of environmental information through enhancement of touch and/or hearing capabilities. Research has demonstrated that several tasks can be successfully completed using acoustic, vibrotactile, and multimodal devices. The suitability of a substituting modality is also mediated by the type of information required to perform the specific task. The present study tested the adequacy of touch and hearing in a grasping task by utilizing a sensory substitution glove. The substituting modalities inform, through increases in stimulation intensity, about the distance between the fingers and the objects. A psychophysical experiment of magnitude estimation was conducted. Forty blindfolded sighted participants discriminated equivalently the intensity of both vibrotactile and acoustic stimulation, although they experienced some difficulty with the more intense stimuli. Additionally, a grasping task involving cylindrical objects of varying diameters, distances and orientations was performed. Thirty blindfolded sighted participants were divided into vibration, sound, or multimodal groups. High performance was achieved (84% correct grasps) with equivalent success rate between groups. Movement variables showed more precision and confidence in the multimodal condition. Through a questionnaire, the multimodal group indicated their preference for using a multimodal SSD in daily life and identified vibration as their primary source of stimulation. These results demonstrate that there is an improvement in performance with specific-purpose SSDs, when the necessary information for a task is identified and coupled with the delivered stimulation. Furthermore, the results suggest that it is possible to achieve functional equivalence between substituting modalities when these previous steps are met.