| Project/Area Number |
17K18706
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Psychology and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
SUNAGA SHOJI 九州大学, 芸術工学研究院, 准教授 (60294998)
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| Project Period (FY) |
2017-06-30 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2017: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Keywords | 2色覚 / 視覚探索 / 色覚異常 / 多色環境 / ２色覚 / ３色覚 / 色覚特性 / 多色視環境 / 色覚 / 視環境 / 色の見え |
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| Outline of Final Research Achievements |
It seems that dichromacy is poorer color vision than trichromacy because dichromacy has indistinguishable colors. However, it is unclear whether dichromacy is really poorer than trichromacy in all functions of color perception, or not.
In this study, we measured visual search performances cued by the S-cone stimulus value for trichromats and dichromats, and compared them. The S-cone stimulus value of the target color was set to the midpoint of two distractor colors. The stimulus duration was varied as a parameter. The observer’s task was to respond which quadrant the target disk which the target color was assigned was on. The results showed that the stimulus duration thresholds of trichromats became as long as or longer than those of dichromats. This suggests that each type of color vision has an advantage depending on color environment.
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| Academic Significance and Societal Importance of the Research Achievements |
２色覚は，見分けられない色があることから，色覚異常と言われ，劣った色覚という考えや印象が社会的に存在する．さらに，これが色覚に関する差別に発展することもあった．これに対し，現在では，２色覚や３色覚は色覚の多様性としてみなすべきという考えが提唱されている．本研究にて明らかにした２色覚が３色覚よりも早く目標刺激を見つけることができる色彩環境があるという事実は，この考えに科学的な根拠を与えるものであり，このような色彩環境を社会に還元していければ，色覚の優劣ではなく，多様性という理解が深まっていくであろう．
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