Abstract
This study examines eyeblink synchronization in interactions characterized by mutual gaze without task-related or conversational elements that can trigger similarities in visual, auditory, or cognitive processing. We developed a study design capable of isolating the role of gaze in human-human interaction and observed the blinking behavior of dyads with mobile eye tracking glasses under three conditions: face-to-face mutual gaze, mediated mutual gaze through a mirror, and self-directed gaze in a mirror. The results revealed that when the interaction was through direct mutual gaze, eyeblink synchronization increased concurrently with a more structured temporal pattern. Also, the sense of connection between partners mimicked the synchronization. These findings suggest that even minor deviations caused by mediated interaction lead to reduced synchronization and a weakened sense of connection among partners. The paper also discusses the need for methodologies to enhance the efficacy and authenticity of online environments and human-robot interaction.
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