Brain Activities Related to Legibility of Text, Studied by Means of Near Infrared Spectroscopy

  • Masako Omori
  • Satoshi Hasegawa
  • Masaru Miyao
  • Masami Choui
  • Hiroshi Tamura
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4557)


Using NIRS, we investigated brain activity in subjects searching for target characters in given text. Visual stimuli consisted of two different contrasts: positive and negative. Both stimuli were displayed for 30 sec on a cathode-ray tube (CRT: 21 inches). The subjects were instructed to watch a visual display on the CRT. This display included text without meaning. When target characters were detected, subjects were instructed to perform three tasks: (1) count the number of target characters by visual observation, (2) tap a button with the thumb and fingers of their left hand carefully and as fast as possible and (3) operate a mobile phone.


brain activities visual observation tap a button operate a mobile phone human interface text entry near infrared spectroscopy 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Ito, Y., Kennan, R.P., Watanabe, E., Koizumi, H.: Assessment of heating effects in skin during continuous wave near infrared spectroscopy. J. Biomed. Opt. 5, 383–390 (2000)CrossRefGoogle Scholar
  2. 2.
    ISO 9241-3. Amendment 1 (2000). ISO 9241-3. Ergonomic requirements for office work with visual display terminals (VDTs) –Part 3: Visual display requirements. International Standard (1992)Google Scholar
  3. 3.
    Tamura, H., Omori, M., Choui, M.: Brain Activities indicated by two dimensional trajectories of NIRS (in Japanese). Mobile Interactions 3, 9–14 (2007)Google Scholar
  4. 4.
    Roland, P.E., Larsen, B., Lassen, N.A., Skinhoj, E.: Supplementary motor area and other cortical areas in organization of voluntary movements in man. J.Neurophysiol. 43, 118 (1980)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Masako Omori
    • 1
  • Satoshi Hasegawa
    • 2
  • Masaru Miyao
    • 3
  • Masami Choui
    • 4
  • Hiroshi Tamura
    • 5
  1. 1.Kobe Women’s University, Faculty of Home Economics, Kobe Women’s University, Suma-ku KobeJapan
  2. 2.Department of Information Culture, Nagoya Bunri University, Inazawa AichiJapan
  3. 3.Information Technology Center, Nagoya University, Chikusa-ku NagoyaJapan
  4. 4.Hiroshima International University, HiroshimaJapan
  5. 5.Tamura Institute for Human Interface, KobeJapan

Personalised recommendations