Where should we look in the road? The effect of gaze position on egocentric direction and position perceptions

[Speaker] Nakashima, Ryoichi:1
[Co-author] Ueda, Sayako:1, Iwai, Ritsuko:1, Hine, Kyoko:1, Kumada, Takatsune:1,2
1:RIKEN (Japan), 2:Kyoto University (Japan)

People can perceive their own direction and position accurately based on only static visual information of the lane edge (Nakashima et al., 2015). Based on this suggestion, we raised one question: Where should people look in the road to perceive their direction and position most accurately? To examine this question, we conducted the egocentric direction and position perception tasks where the observers viewed the static road images, manipulating their fixation position (at the vanishing point of the lane edge, the nearest region from the viewing point, and the intermediate area between the former two). The egocentric direction perception performance was the best when the observers fixated on the vanishing point. In contrast, the egocentric position perception performance was robust against the fixation position. Considering that observers perceive their direction and position simultaneously, we concluded that looking at the vanishing point is the best for the egocentric spatial perception.
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