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No Fatigue Effect on Blink RateBlink rate is reported to vary dependent upon ongoing task performance, perceptual, attentional and cognitive factors, and fatigue. Five levels of task difficulty were operationally defined and task performance as lines read aloud per minute were measured. A single noninvasive infrared TV eyetracker was modified to measure blinking and an on-line computer program identified and counted blinks while the subject performed the tasks. Blink rate decreased by 50% when either task performance increased (fast reading) or visual difficulty increased (blurred text); blink rate increased greatly during rest breaks. There was no change in blink rate during one hour experiments even though subjects complained of severe fatigue.
Document ID
Document Type
Conference Paper
Kim, W.
(California Univ. Berkeley, CA, United States)
Zangemeister, W.
(Hamburg Univ. Berkeley, CA, United States)
Stark, L.
(California Univ.)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: NASA. Ames Research Center 20th Ann. Conf. on Manual Control, Vol. 2
Subject Category
Man/System Technology And Life Support
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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