What role does multisensory integration play in the visuotactile perception of texture?
What role does multisensory integration play in the visuotactile perception of texture?
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DOI：
10.1016/s0167-8760(03)00125-9
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发表时间：
2003-10-01
影响因子：
3
通讯作者：
Spence, C
中科院分区：
文献类型：
--
作者：
Guest, S;Spence, C
先前的研究表明，视觉和触觉在许多粗糙度辨别任务中都是有效的;然而，没有证据表明同时使用这两种感觉可以提高辨别性能。我们调查了这种失败的性质，整合多感官输入，使用三种强迫选择的歧视任务。在实验1中，视觉，触觉和双峰粗糙度歧视对织物刺激。双峰歧视通常进行的灵敏度之间观察到的单峰介绍。在实验2中，使用了类似的设计，除了在刺激呈现期间，一个间隔包含单峰（视觉或触觉）刺激，另一个间隔双峰刺激呈现。对双峰区间的偏差将表明这种呈现的感知粗糙度的大小增加。没有这样的偏见被发现。在实验3中，参与者单间隔，双峰歧视，确定是否提出了一个粗糙的刺激触摸，视觉，两种方式，或没有方式。对于双目标与单目标呈现所看到的改进的性能最好地建模为由视觉和触觉之间的注意力的试验性划分引起的。总的来说，这些结果表明，视觉和触觉作为独立的粗糙度信息的来源，其中的必要性，将注意力分散在这两种方式减少了这些个别的方式（或信息）的辨别能力。(C)2003 Elsevier Science B. V.保留所有权利。
Previous research has shown that vision and touch are both effective at many roughness discrimination tasks; however, there is no evidence that using both senses simultaneously improves discrimination performance. We investigated the nature of this failure to integrate multisensory inputs, using three varieties of forced-choice discrimination tasks. In Experiment 1, visual, tactile and bimodal roughness discriminations were made between pairs of fabric stimuli. Bimodal discriminations were typically performed with a sensitivity somewhere between that observed for the unimodal presentations. In Experiment 2, a similar design was used except that during the stimulus presentation, one interval contained a unimodal (vision or touch) stimulus, the other interval a bimodal stimulus presentation. Bias toward the bimodal interval would indicate an increase in the magnitude of perceived roughness for such presentations. No such bias was found. In Experiment 3, participants made single-interval, bimodal discriminations, determining whether a rough stimulus was presented to touch, to vision, to both modalities, or to neither modality. The improved performance seen for the dual-target vs. single-target presentations was best modelled as arising from a trialwise division of attention between vision and touch. Overall, these results suggest that vision and touch act as independent sources of roughness information, where the necessity to divide attention across both modalities reduces the discriminative ability in (or information available from) each of these individual modalities. (C) 2003 Elsevier Science B.V. All rights reserved.