Title :
Estimation of sleepiness using frequency components of pupillary response
Author :
Nakayama, Minoru ; Yamamoto, Keiko ; Kobayashi, Fumio
Author_Institution :
CRADLE (The Center for R&D of Educ. Technol.), Tokyo Inst. of Technol., Tokyo
Abstract :
Frequency components of pupil responses were extracted from power spectrum density of pupillary change during eye sleepiness tests to conduct an efficient assessment of sleepiness using pupil response. These factor components were applied to two-class classifications of subjective sleepiness using discriminate analysis. The correct rates of the classification during 5 minutes observation were 71% using the Stanford Sleepiness Score (SSS) and a Visual Analogue Scale (VAS), and 94% using the Epworth sleepiness score. Differences in contribution ratios for factor components were shown between the two kinds of subjective sleepiness.
Keywords :
biomedical measurement; frequency estimation; neurophysiology; sleep; spectral analysis; Epworth sleepiness score; Stanford sleepiness score; discriminate analysis; eye sleepiness test; frequency component; power spectrum density; pupillary response; sleepiness estimation; time 5 min; visual analogue scale; Biomedical imaging; Educational technology; Eye protection; Eyes; Frequency estimation; Frequency measurement; Power measurement; Research and development; Sampling methods; Testing;
Conference_Titel :
Biomedical Circuits and Systems Conference, 2008. BioCAS 2008. IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-2878-6
Electronic_ISBN :
978-1-4244-2879-3
DOI :
10.1109/BIOCAS.2008.4696948
