| Co-Investigator(Kenkyū-buntansha) |
SEKIYAMA Kaoru Future University of Hakodate, System and Informatics, Full Professor, システム情報科学部, 教授 (70216539)
NAKAMURA Kiyomi Toyama Prefectural University, Engineering, Full Professor, 工学部, 教授 (20143860)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Research Abstract |
The purpose of this research project was to develop psychophysical models incorporating stimulus uncertainty and multi-dimensional sensory scales, and to examine the effects of stimulus uncertainty and multi-dimensionality in psychophysical experiments.
In the model development, stimulus uncertainty and multi-dimensionality was incorporated into a Thurstonian model. We expressed variance of sensory magnitude as a function of stimulus uncertainty, and modeled sensory distributions and judgment criteria in multidimensional space. Due to technical difficulties, the model has not been completed yet.
In the experiments, we manipulated uncertainty in frequency and spatial location of target tones, and examined the interaction between the two dimensions on intensity resolution. The results showed that uncertainty in either dimension lowered intensity resolution, and that the effects of frequency cueing depended on location uncertainty (Futakuchi et al., in press ; Futakuchi ＆ Mori, submitted ; Mori ＆ Futakuchi, 1999).
We also examined the interaction of spatial location and luminance on orientation sensitivity in visual search experiments. The results showed that orientation sensitivity depended on location uncertainty, luminance, and contrast against the background (Mori, Kataoka, ＆ Kusano, submitted ; Ohtani ＆ Mori, submitted).
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