title: Towards the measurement of event-related EEG activity in real-life working environments.
abstract: In applied contexts, psychophysiological measures have a long tradition to evaluate the user state. EEG correlates that indicate mechanisms of information processing, however, are hardly accessible since discrete time stamps that are necessary for this approach are commonly not available in natural situations. However, eye blinks may close this gap. Eye blinks are assumed to mark distinct points in information processing, necessary to segment the incoming data stream. By using mobile EEG in a simulated working situation we demonstrate that eye-blink-related potentials provide reliable information about cognitive processing in distinct working environments. During cognitive tasks, an increase in the fronto-central N2 component as well as evoked theta activity can be shown, both indices of enhanced cognitive control. The posterior P3 is reduced during physical tasks (sorting of boxes), probably reflecting the more continuous nature of this task. The data are discussed within a model of dopaminergic modulation of blink activity that involves both task specific aspects like executive control and modulating influences of motivation or fatigue.
authors.affiliation: IfADo - Leibniz Research Centre, for Working Environment and Human Factors, Ardeystr. 67, 44139 Dortmund, Germany. Electronic address: wascher@ifado.de.
authors.forename: Edmund
authors.initials: E
authors.lastname: Wascher
authors.affiliation: IfADo - Leibniz Research Centre, for Working Environment and Human Factors, Ardeystr. 67, 44139 Dortmund, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Heppner
authors.affiliation: IfADo - Leibniz Research Centre, for Working Environment and Human Factors, Ardeystr. 67, 44139 Dortmund, Germany.
authors.forename: Sven
authors.initials: S
authors.lastname: Hoffmann
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001767:Blinking; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D040421:Cell Phone; D003071:Cognition / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D014937:Work; D017132:Workplace; D055815:Young Adult
keywords: ERP; Eye blinks; Mobile EEG; Working environment