Purpose: The purpose of this study was to investigate the psychophysical understanding of the slip stimulus. We emphasized that the perception of slip and its characteristics, such as slip distance and slip speed depend on the interaction between slip direction, slip distance as well as slip speed. Methods: We developed a novel slip induction device to simulate the artificial sense of slip. We conducted a psychophysical experiment on eight healthy subjects. The experiment was designed to evaluate the effect of slip direction on slip perception as well as on the perception of slip distance and slip speed. A series of psychophysical questions were asked at the end of the slip stimulation to record the subjective responses of the participants. The average success rate (%) was used to quantify the subject responses. Results: We demonstrated that the perception of slip is independent of slip direction however, perception of slip distance and slip speed are significantly modulated by slip direction. We also observed that a significant interaction exists between slip distance and slip speed in the upward slip direction. It was also observed that the average success rate was significantly different for various combinations of slip distance and slip speed in the upward slip direction. Conclusions: Our study clearly establishes a significant interaction between the slip direction, slip distance, and slip speed for psychophysical understanding of the perception of slip distance and slip speed.

翻译：目的：本研究旨在探究滑移刺激的心理物理学理解。我们强调，滑移及其特征（如滑移距离和滑移速度）的感知取决于滑移方向、滑移距离以及滑移速度之间的相互作用。方法：我们开发了一种新型滑移诱导装置，用于模拟人工滑移感。我们在八名健康受试者上进行了心理物理学实验。实验旨在评估滑移方向对滑移感知以及滑移距离和滑移速度感知的影响。在滑移刺激结束后，提出了一系列心理物理学问题，以记录受试者的主观反应。采用平均成功率（%）来量化受试者的反应。结果：我们证明滑移的感知与滑移方向无关，然而，滑移距离和滑移速度的感知显著受到滑移方向的调节。我们还观察到，在向上滑移方向上，滑移距离与滑移速度之间存在显著的交互作用。同时发现，在向上滑移方向上，不同滑移距离与滑移速度组合的平均成功率存在显著差异。结论：本研究明确建立了滑移方向、滑移距离与滑移速度之间的显著交互作用，为滑移距离和滑移速度感知的心理物理学理解提供了基础。