%0 Journal Article
%T Towards a new approach to detect sleepiness: validation of the objective sleepiness scale under simulated driving conditions
%J Transportation research part F: traffic psychology and behaviour
%D 2022
%A Giot, C.
%A Hay, M.
%A Chesneau, C.
%A Pigeon, E.
%A Bonargent, T.
%A Beaufils, M.
%A Chastan, N.
%A Perrier, J.
%A Pasquier, F.
%A Polvent, S.
%A Davenne, D.
%A Taillard, J.
%A Bessot, N.
%V 90
%N 
%P 109-119
%X The Objective Sleepiness Scale (OSS) was developed to detect and quantify sleepiness on the basis of two direct and reliable sleepiness indicators: EEG and EOG. The present study aims to test whether the OSS can be used to detect sleepiness episodes that impair performance on driving and vigilance tasks accurately and with a good time synchronization. Forty-three healthy volunteers performed monotonous driving sessions on a simulator and the psychomotor vigilance task (PVT) in a normal sleep condition and after partial sleep deprivation. OSS reliability and time synchronization for sleepiness detection were tested on driving (standard deviation of vehicle lateral position and off-road duration) and PVT (reaction time and lapses). Inter-rater reliability of the scale was evaluated by two blinded scorers. <br><br>RESULTS show that the OSS score indicates higher sleepiness in sleep deprivation conditions (p < 0.001) and with time-on-task. Differences of performance between OSS score calculated with multiple pairwise comparisons, indicate OSS score increase when driving performance (SDLP and off-road duration) decreases (p < 0.001 for comparisons between OSS stages 0 vs 2, 0 vs 3, 1 vs 2 and p < 0.05 for 1 vs 3). Reaction time during PVT is also related to the OSS score (p < 0.05 for OSS values from 0 to 2, 0 to 3, 1 to 2 and 1 to 3). There is no proportional relation between OSS score and performance impairment, but a threshold effect between levels 1 and 2 of the scale is observed. Positive outcomes are also obtained for time synchronization of the OSS assessed on driving performance (p < 0.001 for both SDLP and off-road duration). Finally, inter-rater agreement is found to be considerable. The results allow us to consider using the Objective Sleepiness Scale as a tool for research on sleepiness.<p /> <p>Language: en</p>
%G en
%I Elsevier Publishing
%@ 1369-8478
%U http://dx.doi.org/10.1016/j.trf.2022.08.007