Viewed touch influences tactile detection by altering decision criterion.

IF 1.7 4区 心理学 Q3 PSYCHOLOGY Attention Perception & Psychophysics Pub Date : 2024-11-05 DOI:10.3758/s13414-024-02959-7
Anupama Nair, Jared Medina
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Abstract

Our tactile perception is shaped not only by somatosensory input but also by visual information. Prior research on the effect of viewing touch on tactile processing has found higher tactile detection rates when paired with viewed touch versus a control visual stimulus. Therefore, some have proposed a vicarious tactile system that activates somatosensory areas when viewing touch, resulting in enhanced tactile perception. However, we propose an alternative explanation: Viewing touch makes the observer more liberal in their decision to report a tactile stimulus relative to not viewing touch, also resulting in higher tactile detection rates. To disambiguate between the two explanations, we examined the effect of viewed touch on tactile sensitivity and decision criterion using signal detection theory. In three experiments, participants engaged in a tactile detection task while viewing a hand being touched or approached by a finger, a red dot, or no stimulus. We found that viewing touch led to a consistent, liberal criterion shift but inconsistent enhancement in tactile sensitivity relative to not viewing touch. Moreover, observing a finger approach the hand was sufficient to bias the criterion. These findings suggest that viewing touch influences tactile performance by altering tactile decision mechanisms rather than the tactile perceptual signal.

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观看触觉通过改变决策标准来影响触觉检测。
我们的触觉感知不仅受体感输入的影响,也受视觉信息的影响。之前关于观看触觉对触觉处理的影响的研究发现,与对照视觉刺激相比,与观看触觉配对的触觉检测率更高。因此,有人提出了一种替代触觉系统,即在观看触觉时激活躯体感觉区域,从而增强触觉感知。然而,我们提出了另一种解释:相对于不观看触觉,观看触觉会使观察者在决定报告触觉刺激时更加自由,这也会导致更高的触觉检测率。为了区分这两种解释,我们利用信号检测理论研究了观看触觉对触觉敏感度和决策标准的影响。在三项实验中,参与者在观看被手指触摸或接近的手、红点或无刺激的情况下进行触觉检测任务。我们发现,与不观察触觉相比,观察触觉会导致一致的、自由的标准转移,但触觉灵敏度的增强却不一致。此外,观察手指接近手部足以使标准发生偏移。这些研究结果表明,观察触觉是通过改变触觉决策机制而不是触觉知觉信号来影响触觉表现的。
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来源期刊
CiteScore
3.60
自引率
17.60%
发文量
197
审稿时长
4-8 weeks
期刊介绍: The journal Attention, Perception, & Psychophysics is an official journal of the Psychonomic Society. It spans all areas of research in sensory processes, perception, attention, and psychophysics. Most articles published are reports of experimental work; the journal also presents theoretical, integrative, and evaluative reviews. Commentary on issues of importance to researchers appears in a special section of the journal. Founded in 1966 as Perception & Psychophysics, the journal assumed its present name in 2009.
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