Discriminable dimensions of tactile raised dots in Braille graphics

• Project/Area Number: 26870863
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Experimental psychology; Rehabilitation science/Welfare engineering
• Research Institution: Seikei University
• Principal Investigator: Toyoda Wataru 成蹊大学, 理工学部, 助教 (90609257)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 視覚障害 / 点図 / 識別 / 触覚 / 点字プリンター / 視覚障害者 / 触図 / 弁別 / 弁別特性 / 凸点 / 高さ / 歩行訓練 / 視覚障害特性 / 心理物理

Outline of Final Research Achievements

The purpose of this research was to clarify the conditions for distinguishing the height and the diameter of tactile dots of braille graphics used by persons with visual impairments. Results of psychophysical experiments revealed that the height discrimination threshold and the Weber fraction were clarified according to the changes in the tactile characteristic depending on the age and the tactile experience of persons with visual impairments. On the other hand, it was difficult to accurately discriminate the tactile dots just by changing the diameter. The data can serve as useful references for designing Braille printers.

Research Products

• [Presentation] 視覚障害受障時期の違いを想定した点図における凸状点線の高さ識別特性の評価 (2015)
  • Author(s): 豊田航，宮本涼，大内進，大倉元宏，井上剛伸
  • Organizer: 第41回感覚代行シンポジウム講演論文集
  • Place of Presentation: 産総研臨海副都心センター別館11階多目的室
  • Year and Date: 2015-12-08
• [Presentation] 歩行訓練士による触地図を用いた訓練方法に関する調査 (2015)
  • Author(s): 豊田航，須藤友輝，大内進，尾形真樹，清水美知子，大倉元宏
  • Organizer: 第41回感覚代行シンポジウム講演論文集
  • Place of Presentation: 産総研臨海副都心センター別館11階多目的室
  • Year and Date: 2015-12-08
• [Presentation] 点図における凸点の高さ弁別特性の評価 (2014)
  • Author(s): 豊田航，大内進，井上剛伸
  • Organizer: 第35回バイオメカニズム学術講演会
  • Place of Presentation: 岡山大学
  • Year and Date: 2014-11-09
• [Presentation] 点図の触読性に影響を及ぼす作成要因の抽出 (2014)
  • Author(s): 豊田航，大内進，井上剛伸
  • Organizer: 第23回視覚障害リハビリテーション研究発表大会抄録集
  • Place of Presentation: 同志社大学
  • Year and Date: 2014-07-19