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Shorter fixation durations in visual search after 24 hours of total sleep deprivation

Mühl, C. and Aeschbach, D. (2017) Shorter fixation durations in visual search after 24 hours of total sleep deprivation. 19th European Conference on Eye Movements (ECEM), 20.-24.08.2017, Wuppertal.

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Visual attention is a relevant construct in the domain of aviation, since information for operators is often presented visually. Shift and night work schedules in the aviation industry require an understanding of the susceptibility of visual attention to sleep deprivation (SD). To study the effect of SD on visual attention, we employed two well-established serial search paradigms and analyzed average fixation duration and saccade velocity. We expected SD-induced cognitive slowing to be accompanied by longer fixation durations and slower saccades. We measured search performance and the related oculomotor characteristics before and after 24 hours of SD in 24 subjects, as well as in a well-rested control group. Search performance deteriorated significantly compared to the control group in terms of speed and accuracy. Saccade velocity decreased strongly. Contrary to our expectation, we found a decrease in fixation duration under SD, while the number of fixations did not change significantly. The results show only a partial slowing of oculomotor characteristics in visual search after SD. The decrease of mean fixation duration, however, might indicate a propensity for faster and riskier decision-making, manifesting itself on the level of single fixations. Known as “speed-error trade-off”, such behavior reflects problems to compensate SD-impaired cognitive processes.

Item URL in elib:https://elib.dlr.de/114834/
Document Type:Conference or Workshop Item (Speech)
Title:Shorter fixation durations in visual search after 24 hours of total sleep deprivation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mühl, C.christian.muehl (at) dlr.deUNSPECIFIED
Aeschbach, D.daniel.aeschbach (at) dlr.deUNSPECIFIED
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:sleep deprivation, attention, visual search, search performance, fixation duration, saccade velocity
Event Title:19th European Conference on Eye Movements (ECEM)
Event Location:Wuppertal
Event Type:international Conference
Event Dates:20.-24.08.2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Human factors and safety in Aeronautics (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Sleep and Human Factors Research
Deposited By: Sender, Alina
Deposited On:02 Nov 2017 12:37
Last Modified:31 Jul 2019 20:12

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