複数人による双方向の対面行動を計量する頭部装着型デバイス | A Head-Mounted Device for Measuring Mutual Facing Behavior among Individuals

Abstract

In this paper, we describe the development of a head-mounted device that weighs and realizes in real time the interactive face-to-face behavior of multiple people. First, we define face-to-face interaction as a state in which two people’s faces are positioned within ±20 degrees of each other’s head direction, and describe the implementation of a head-mounted device that weighs face-to-face behavior based on the relative head directions of multiple people. This device uses an infrared communication module whose optical axis is aligned with the head direction to measure face-to-face behavior based on the state of established communication with other devices. It is also capable of showing the weighing results in real time by emitting light, and recording the start time, duration, and partner of the face-to-face state by interfacing with an Android terminal. Next, we analyze the subject’s eye and head movements while looking at the other person’s face to verify the validity of the defined face-to-face behavior. Then, we evaluate the performance of the developed device through laboratory experiments. From the experimental results, we confirmed that the device has a face-to-face detection threshold of approximately ±20 degrees and a response time of approximately 330 milliseconds. The face-to-face action measurements by the device and the video observer were compared, and the results showed statistically high agreement.

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