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Effects of the audiovisual conflict on auditory early processes

Scannella, Sébastien and Causse, Mickaël and Chauveau, Nicolas and Pastor, Josette and Dehais, Frédéric Effects of the audiovisual conflict on auditory early processes. (2013) International Journal of Psychophysiology, 89 (1). 115-122. ISSN 0167-8760

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.ijpsycho.2013.06.009


Auditory alarm misperception is one of the critical events that lead aircraft pilots to an erroneous flying decision. The rarity of these alarmsassociatedwith their possible unreliabilitymay play a role in thismisperception. In order to investigate this hypothesis, we manipulated both audiovisual conflict and sound rarity in a simplified landing task. Behavioral data and event related potentials (ERPs) of thirteen healthy participants were analyzed. We found that the presentation of a rare auditory signal (i.e. an alarm), incongruent with visual information, led to a smaller amplitude of the auditory N100 (i.e. less negative) compared to the condition in which both signals were congruent.Moreover, the incongruity between the visual information and the rare sound did not significantly affect reaction times, suggesting that the rare sound was neglected. We propose that the lower N100 amplitude reflects an early visual-to-auditory gating that depends on the rarity of the sound. In complex aircraft environments, this early effect might be partly responsible for auditory alarm insensitivity. Our results provide a new basis for future aeronautic studies and the development of countermeasures.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at International Journal of Psychophysiology: http://www.sciencedirect.com/science/journal/01678760/89/1
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Institut National de la Santé et de la Recherche Médicale - INSERM (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:31 Jan 2014 09:07

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