Gender and Age Analyses of NIRS/STAI Pearson Correlation Coefficients at Resting State

  • T. MatsumotoEmail author
  • Y. Fuchita
  • K. Ichikawa
  • Y. Fukuda
  • N. Takemura
  • K. Sakatani
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 876)


According to the valence asymmetry hypothesis, the left/right asymmetry of PFC activity is correlated with specific emotional responses to mental stress and personality traits. In a previous study we measured spontaneous oscillation of oxy-Hb concentrations in the bilateral PFC at rest in normal adults employing two-channel portable NIRS and computed the laterality index at rest (LIR). We investigated the Pearson correlation coefficient between the LIR and anxiety levels evaluated by the State-Trait Anxiety Inventory (STAI) test. We found that subjects with right-dominant activity at rest showed higher STAI scores, while those with left dominant oxy-Hb changes at rest showed lower STAI scores such that the Pearson correlation coefficient between LIR and STAI was positive. This study performed Bootstrap analysis on the data and showed the following statistics of the target correlation coefficient: mean = 0.4925 and lower confidence limit = 0.177 with confidence level 0.05. Using the KS-test, we demonstrated that the correlation did not depend on age, whereas it did depend on gender.


NIRS STAI Pearson correlation coefficient Bootstrap analysis Kolmogorov-Smirnov test 



This research was supported in part by Grant-in-Aid for Exploratory Research (25560356).


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Copyright information

© Springer Science+Business Media, New York 2016

Authors and Affiliations

  • T. Matsumoto
    • 1
    Email author
  • Y. Fuchita
    • 1
  • K. Ichikawa
    • 1
  • Y. Fukuda
    • 1
  • N. Takemura
    • 2
  • K. Sakatani
    • 2
  1. 1.Department of Electrical Engineering and BioscienceWaseda UniversityTokyoJapan
  2. 2.Department of Electrical and Electronics Engineering, NEWCAT Research Institute, College of EngineeringNihon UniversityKoriyamaJapan

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