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Design Guidelines for Schematizing and Rendering Haptically Perceivable Graphical Elements on Touchscreen Devices
International Journal of Human-Computer Interaction ( IF 3.4 ) Pub Date : 2020-04-29 , DOI: 10.1080/10447318.2020.1752464
Hari P. Palani 1 , Paul D. S. Fink 1 , Nicholas A. Giudice 1
Affiliation  

This paper explores the viability of new touchscreen-based haptic/vibrotactile interactions as a primary modality for perceiving visual graphical elements in eyes-free situations. For touchscreen-based haptic information extraction to be both accurate and meaningful, the onscreen graphical elements should be schematized and downsampled to: (1) maximize the perceptual specificity of touch-based sensing and (2) account for the technical characteristics of touchscreen interfaces. To this end, six human behavioral studies were conducted with 64 blind and 105 blindfolded-sighted participants. Experiments 1–3 evaluated three key rendering parameters that are necessary for supporting touchscreen-based vibrotactile perception of graphical information, with results providing empirical guidance on both minimally detectable and functionally discriminable line widths, inter-line spacing, and angular separation that should be maintained. Experiments 4–6 evaluated perceptually-motivated design guidelines governing visual-to-vibrotactile schematization required for tasks involving information extraction, learning, and cognition of multi-line paths (e.g., transit-maps and corridor-intersections), with results providing clear guidance as to the stimulus parameters maximizing accuracy and temporal performance. The six empirically-validated guidelines presented here, based on results from 169 participants, provide designers and content providers with much-needed guidance on effectively incorporating perceptually-salient touchscreen-based haptic feedback as a primary interaction style for interfaces supporting nonvisual and eyes-free information access.



中文翻译:

在触摸屏设备上设计和渲染可触觉感知的图形元素的设计指南

本文探讨了新的基于触摸屏的触觉/触觉交互作用的可行性,这种交互作用是在无眼情况下感知视觉图形元素的主要方式。为了使基于触摸屏的触觉信息提取既准确又有意义,应对屏幕上的图形元素进行模式化和降采样以:(1)最大化基于触摸的感知的感知特异性,以及(2)考虑触摸屏界面的技术特征。为此,对64位盲人和105位盲目参与者进行了六项人类行为研究。实验1-3评估了三个关键渲染参数,这些参数对于支持基于触摸屏的图形信息的触觉感知是必要的,结果为应保持的最小可检测线宽度和功能可分辨线宽度,行间间距和角度间隔提供了经验指导。实验4–6评估了知觉动机的设计准则,这些准则指导视觉到振动触觉模式化,这些任务涉及涉及信息提取,学习和多线路径(例如,过境图和走廊交叉口)识别的任务,关于刺激参数最大化准确性和时间性能。根据169位参与者的结果,此处介绍了六项经过经验验证的指南,

更新日期:2020-04-29
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