Changing pitch induced visual motion illusion

Maeda, Fumiko, Kanai, Ryota and Shimojo, Shinsuke (2004) Changing pitch induced visual motion illusion. Current Biology, 14 (23). R990-R991. ISSN 0960-9822

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Abstract

We often associate moving objects and changing pitch, e.g., falling stones with descending, and launching rockets with ascending pitch, even when these sounds do not happen in the real-world. The reason for this is unknown. Here we report an illusion in which auditory stimuli with no apparent spatial and motion information [[1–3]] alter human visual motion perception. Subjects made a two alternative forced choice (upward (Vup) or downward (Vdown) visual motion perception) while presented with two superimposed, oppositely moving gratings (experiment 1), accompanied by either an ascending or a descending pitch of pure tone, or broad-band noise (Figure 1A). Gratings with ambiguous motion accompanied by ascending pitch were more likely to be perceived as an upward motion, those accompanied by descending pitch as a downward motion, whereas noise caused no directional bias.

Item Type: Article
Schools and Departments: School of Psychology > Psychology
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry
Depositing User: Ryota Kanai
Date Deposited: 11 Mar 2013 11:27
Last Modified: 11 Mar 2013 11:27
URI: http://sro.sussex.ac.uk/id/eprint/43997
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