Several studies in the affective haptics research field showed the potential of using haptic technology to convey emotions in remote communications. In this context, it is of interest to simplify the haptic feedback without altering the informative content of the stimulus, with a two-fold advantage. On one side, it would allow the development of affective haptic devices whose technological complexity is limited, hence more compatible with wearability and portability requirements. On the other side, having a simplified set of stimuli would decrease the amount of data to be transmitted, thus improving the overall quality of remote haptic interactions. In this work, we investigated the correlation between the parameters regulating a caress-like stimulation and the perceived pleasantness. This was done by means of two experiments, in which we asked subjects to adjust the temperature and the motion velocity of a set of stimuli in order to find the most pleasant combination. Results indicated that subjects preferred different values of temperature and velocity of the stimulus depending on the proposed tactile stimulation. A small difference in the pleasantness ratings was observed between caresses provided with linear movements and those given as discrete sequences of taps. In particular, participants preferred linear movements set at $34.5 \,^{\circ }\mathrm{C}$ and $3.4 \,\mathrm{c}\mathrm{m}\mathrm{s}^{-1}$ . As regards caress-like stimuli provided with discrete sequences of taps, the preferred temperature and velocity were $33.2 \,\mathrm{^{\circ }C}$ and $2.9 \,\mathrm{c}\mathrm{m}\mathrm{s}^{-1}$ , respectively. The presence of vibration had a little effect on the perceived pleasantness.

中文翻译：

---

论触觉刺激与愉悦感之间的相关性

情感触觉研究领域的几项研究表明，使用触觉技术在远程通信中传达情感的潜力。在这种情况下，在不改变刺激的信息内容的情况下简化触觉反馈是有意义的，具有双重优势。一方面，它将允许开发技术复杂性有限的情感触觉设备，因此更符合可穿戴性和便携性要求。另一方面，拥有一组简化的刺激将减少要传输的数据量，从而提高远程触觉交互的整体质量。在这项工作中，我们研究了调节爱抚样刺激的参数与感知的愉悦感之间的相关性。这是通过两个实验完成的，其中我们要求受试者调整一组刺激的温度和运动速度，以找到最令人愉快的组合。结果表明，根据所提出的触觉刺激，受试者更喜欢不同的刺激温度和速度值。在通过线性运动提供的爱抚和以离散的轻击序列提供的爱抚之间观察到愉悦度评级存在微小差异。特别是，参与者更喜欢设置为线性运动$34.5 \,^{\circ }\mathrm{C}$和$3.4 \,\mathrm{c}\mathrm{m}\mathrm{s}^{-1}$ 。至于通过离散的轻击序列提供的类似爱抚的刺激，首选的温度和速度是$33.2 \,\mathrm{^{\circ }C}$和$2.9 \,\mathrm{c}\mathrm{m}\mathrm{s}^{-1}$ ， 分别。振动的存在对感知的愉悦感有一点影响。