Authors: Daiki Yamasaki, Kiyofumi Miyoshi, Christian F. Altmann, Hiroshi Ashida

Title: Front-Presented Looming Sound Selectively Alters the Perceived Size of a Visual Looming Object

Journal(書誌情報): Perception

doi: 10.1177/0301006618777708

論文URL: http://journals.sagepub.com/doi/full/10.1177/0301006618777708

Abstract: In spite of accumulating evidence for the spatial rule governing cross-modal interaction according to the spatial consistency of stimuli, it is still unclear whether 3D spatial consistency (i.e., front/rear of the body) of stimuli also regulates audiovisual interaction. We investigated how sounds with increasing/decreasing intensity (looming/receding sound) presented from the front and rear space of the body impact the size perception of a dynamic visual object. Participants performed a size-matching task (Experiments 1 and 2) and a size adjustment task (Experiment 3) of visual stimuli with increasing/decreasing diameter, while being exposed to a front- or rear-presented sound with increasing/decreasing intensity. Throughout these experiments, we demonstrated that only the front-presented looming sound caused overestimation of the spatially consistent looming visual stimulus in size, but not of the spatially inconsistent and the receding visual stimulus. The receding sound had no significant effect on vision. Our results revealed that looming sound alters dynamic visual size perception depending on the consistency in the approaching quality and the front–rear spatial location of audiovisual stimuli, suggesting that the human brain differently processes audiovisual inputs based on their 3D spatial consistency. This selective interaction between looming signals should contribute to faster detection of approaching threats. Our findings extend the spatial rule governing audiovisual interaction into 3D space.

Email: yamasaki.daiki.58n[at]st.kyoto-u.ac.jp([at] を@に置き換えてください）

コメント：接近物体の大きさ知覚において，視聴覚情報がどのように統合されるかを検討した．身体前後に呈示される視聴覚刺激の位置関係に着目した3つの実験を実施し，以下のことを示した．⑴身体前方から呈示された接近音によって，接近物体の大きさの過大視が生じた．⑵接近音が身体後方から呈示された場合には，接近物体の見えは変容しなかった．⑶このような視聴覚相互作用は接近する視聴覚刺激に選択的に見られ，後退物体や後退音によっては生じなかった．これらの結果は，ヒトが視聴覚情報を運動方向や三次元位置関係に従って適切に統合し，接近物体の知覚を形成することを示す．

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