The effect of exogenous spatial attention on auditory information processing |
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Authors: | Kenichi Kanai Kazuo Ikeda Tadayuki Tayama |
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Institution: | (1) Information Security Unit, NTT Advanced Technology Corporation, 12-1, Ekimae-Honcho, Kawasaki, Kanagawa 210-0007, Japan;(2) Department of Human Culture, Kochi University, 2-5-1 Akebonocho, Kochi 780-8520, Japan;(3) Department of Psychology, Hokkaido University, N10 W7, Kita-Ku, Hokkaido, Sapporo 060-0810, Japan |
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Abstract: | This study investigated the effect of exogenous spatial attention on auditory information processing. In Experiments 1, 2 and 3, temporal order judgment tasks were performed to examine the effect. In Experiment 1 and 2, a cue tone was presented to either the left or right ear, followed by sequential presentation of two target tones. The subjects
judged the order of presentation of the target tones. The results showed that subjects heard both tones simultaneously when
the target tone, which was presented on the same side as the cue tone, was presented after the target tone on the opposite
side. This indicates that spatial exogenous attention was aroused by the cue tone, and facilitated subsequent auditory information
processing. Experiment 3 examined whether both cue position and frequency influence the resulting information processing. The same effect of spatial
attention was observed, but the effect of attention to a certain frequency was only partially observed. In Experiment 4, a tone fusion judgment task was performed to examine whether the effect of spatial attention occurred in the initial stages
of hearing. The result suggests that the effect occurred in the later stages of hearing. |
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