Humans perceive wetness on contact with a dry-cold material; however, the magnitude of wetness that can be perceived using dynamic touch remains unclear. This study assessed how the type of touch, namely hand movement (either statically or dynamically) and pressing force (either low or high pressure), affect the perception of wetness. The participants judged the magnitude of perceived wetness after four types of touch of four stimuli comprising four fabrics of varying water content and surface temperatures. Overall, the perceived wetness was differed between static and dynamic touch independent of pressure and the participants scored the dry-cold stimulus as relatively dry for dynamic touch. Furthermore, cluster analysis revealed individual differences in the recognition of wetness in dynamic touch conditions. These results revealed the variability in the mechanisms used by humans to perceive wetness. Additionally, we discussed the optimal methods to reproduce the wetness perception using this illusion.

中文翻译：

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动态触摸产生的潮湿错觉

人类在接触干冷材料时会感觉到潮湿；然而，使用动态触摸可以感知的潮湿程度仍不清楚。该研究评估了触摸类型，即手部运动（静态或动态）和压力（低压或高压）如何影响对潮湿的感知。参与者在四种刺激的四种触摸后判断感知湿度的大小，这些刺激包括四种不同含水量和表面温度的织物。总体而言，独立于压力的静态和动态触摸之间的感知湿度不同，参与者将干冷刺激评分为动态触摸相对干燥。此外，聚类分析揭示了动态触摸条件下湿度识别的个体差异。这些结果揭示了人类感知湿度的机制的可变性。此外，我们还讨论了使用这种错觉重现潮湿感知的最佳方法。