| Project/Area Number |
07459017
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
広領域
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| Research Institution | Kyushu Institute of Design |
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Principal Investigator |
NAKAJIMA Yoshitaka Kyushu Institute of Design Faculty of Design Associate Professor, 芸術工学部, 助教授 (90127267)
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| Co-Investigator(Kenkyū-buntansha) |
SUGITA Yoichi Toyohashi University of Technology, Faculty of Engineering Associate professor, 工学部, 助教授 (40221311)
TSUMURA Takashi Kyushu Institute of Design, Faculty of Design Professor, 芸術工学部, 教授 (20038962)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1995: ¥4,000,000 (Direct Cost: ¥4,000,000)
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| Keywords | time perception / the gap transfer illusion / auditory streams / time-shrinking / assimilation / Gestalt principles / the principle of proximity / the principle of similarity / 処理時間仮説 / 音事象構築モデル / リズム / 聴覚コミュニケーション / 錯覚 / 音事象 / 連続聴効果 / 文法 / 事象関連電位 / 知覚実験 / 単一神経細胞の活動 |
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| Research Abstract |
Time perception plays an important role in our everyday life when we commnicate with other people, detect changes in the environement, and control bodily motions. We investigated the mechanism of the perception of temporal patterns containing short time intervals of 50-500 ms.
Two hypotheses were proposed and examined in order to explain a few illusory phenomena, which Nakajima found recently. The processing time hypothesis claims that the subjective duration of an inter-onset interval (or an empty time interval) is in propotion to its physical duration plus an additional processing time required after the detection of the second onset. This hypothesis explains both the non-proportional psychophysical function of empty duration and an illusion called time-shrinking, i.e., underestimation of an empty duration preceded immediately by another empty duration which is shorter.
The event construction model is based on the assumption that onsets and terminations of tones are detected independently and that an onset and a termination can be connected with each other perceptually when they are close enough to each other. Although this model is rather simple, it explains a couple of perceptual phenomena fairly well, and it can be also expanded to describe a few more phenomena. The gap transfer illusion is a typical example. When an ascending glide tone longer than 2000 ms and a descending glide tone of about 500 ms cross each other sharing the temporal middle at about 1000 Hz, a temporal gap in the middle of the longer component is perceived as if it had been transferred into the shorter component.
We attempted to relate a few Gestalt principles with the above hypotheses, and developed psychophysical and neurophysiological procedures to investigate these Gestalt principles.
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