Our interactions with technology do not just shape our individual experiences. They also affect people around us. Although previous research has addressed such "witness" experiences, the actual effect of interaction design on the witness experience remains largely unknown. In an online study (n = 407), we explored how witnesses perceive mid-air gesture-based interactions with a hearing aid, using four video vignettes. We studied witnesses' subjective visibility of manipulations and effects (following Reeves and colleagues' taxonomy), perceived form of interaction, subjective experience, and relationships between these measures. Although visibility patterns matched the intended form, they did not lead to the supposed experience (i.e., "suspenseful" gestures did not lead to suspenseful experiences). The paper illustrates gaps in current research about witness experiences, demonstrates the need to overcome basic hiding/revealing profiles, and indicates a path forward by focusing on aesthetic forms and experiences.

翻译：我们与技术的互动不仅塑造个人体验，也影响着周围的人。尽管已有研究涉及这种"旁观者"体验，但交互设计对旁观者体验的实际影响在很大程度上仍是未知的。通过一项在线研究（n=407），我们利用四个视频片段探究了旁观者如何感知对手语助听器进行的空中手势交互。我们研究了旁观者对操作及其效果的感知可见性（遵循Reeves及其同事的分类法）、感知到的交互形式、主观体验以及这些指标之间的关系。尽管可见性模式与预期形式相符，却并未带来假设的体验（即"悬念性"手势未引发悬念体验）。本文揭示了当前旁观者体验研究的不足，论证了克服基本隐藏/揭示范式的必要性，并指出通过聚焦美学形式与体验来推进研究的前进方向。