視線の知覚・制御を理解する(顔を見る,顔を思う,顔をつくる-顔知覚研究の行方-,2005年度 第2回フォーラム)

抄録

In this research, we investigated the function of human eye-gaze perception and control system. The whites of human eyes produce a strong contrast with the pupils, and in light of this fact, detection of the eye-gaze direction is relatively easy to do. Our result in Experiment 1, however, showed that the perceived eye-gaze direction is affected not only by the eyes but also by the direction of the whole head. From the perceived position, the actual gazed position can be estimated by a linear function model. From the result of Experiment 2, we found that the head and eye movements of perceiver are also systematically affected by the looker's head rotation. Additionally, in the MRI imaging study in Experiment 3, it was shown that the rotation center of the eyeball when the participant gazed at various points was located backward, and the rotation angle was asymmetric on both eyes.