Many studies have been conducted to find approaches to overcome the Uncanny Valley. However, the focus on the influence of the robot’s appearance leaves a big missing part: the influence of the robot’s nonverbal behaviour. This impedes the complete exploration of the Uncanny Valley. In this study, we explored the Uncanny Valley from the viewpoint of the robot’s nonverbal behaviour in regard to the Uncanny Valley hypothesis. We observed a relationship between the participants’ ratings on human-likeness of the robot’s nonverbal behavior and affinity toward the robot’s nonverbal behavior, and define the point where the affinity toward the robot’s nonverbal behavior significantly drops down as the Uncanny Valley. In this study, an experiment of human–robot interaction was conducted. The participants were asked to interact with a robot with different nonverbal behaviours, ranging from 0 (no nonverbal behavior, speaking only) to 3 (gaze, head nodding, and gestures) combinations and to rate the perceived human-likeness and affinity toward the robot’s nonverbal behavior by using a questionnaire. Additionally, the participants’ fixation duration was measured during the experiment. The result showed a biphasic relationship between human-likeness and affinity rating results. A curve resembling the Uncanny Valley is found. The result was also supported by participants’ fixation duration. It showed that the participants had the longest fixation at the robot when the robot expressed the nonverbal behaviours that fall into the Uncanny Valley. This exploratory study provides evidence suggesting the existence of the Uncanny Valley from the viewpoint of the robot’s nonverbal behaviour.

已经进行了许多研究以找到克服Uncanny山谷的方法。但是，关注机器人外观的影响却留下了一个很大的缺失部分：机器人非语言行为的影响。这阻碍了对Uncanny山谷的全面探索。在这项研究中，我们从机器人关于Uncanny Valley假说的非语言行为的角度探讨了Uncanny Valley。我们观察到参与者对机器人非语言行为的人类相似性等级与对机器人非语言行为的亲和力之间的关系，并定义了对机器人非语言行为的亲和力显着下降的点，即Uncanny Valley。在这项研究中，进行了人机交互的实验。要求参与者与具有不同非语言行为的机器人进行交互，其范围从0（无非语言行为，仅说）到3（注视，头部点头和手势）组合，并对与机器人的感觉相似度和亲和力进行评分通过使用问卷进行非语言行为。此外，在实验过程中测量了参与者的固定持续时间。结果表明，人像与亲和力评级结果之间存在两相关系。找到一条类似于Uncanny Valley的曲线。参与者的注视时间也支持该结果。结果表明，当机器人表达掉落在“超人谷”的非语言行为时，参与者对机器人的固定时间最长。