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Personne :
Vachon, François

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Vachon

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François

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Université Laval. École de psychologie

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ncf11849555

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Voici les éléments 1 - 2 sur 2
  • PublicationRestreint
    Eyes have ears : indexing the orienting response to sound using pupillometry
    (Elsevier, 2017-10-07) Vachon, François; Labonté, Katherine; Marois, Alexandre; Parent, Mark
    The rare occurrence of a sound deviating from the auditory background tends to trigger attentional orienting. While some sympathetic physiological responses can be used to index this orienting response, findings surrounding the pupillary dilation response (PDR) as a proxy for the orienting response are conflicting. The current study was tailor-designed to examine whether the PDR satisfies specific criteria of an orienting response index, namely the classic habituation pattern and a sensitivity to the size of the deviation. The PDR decrement to a repeated standard sound, recovery to a deviant sound, and dishabituation to the re-presentation of the standard were assessed for small and large deviations embedded in irrelevant auditory sequences. The PDR not only showed habituation and dishabituation, but also recovered in correspondence with the magnitude of the acoustic deviation. This consistency between variations of the PDR and orienting response's properties indicates that the PDR is a valid index of the auditory orienting response.
  • PublicationRestreint
    Forewarning interruptions in dynamic settings : can prevention bolster recovery ?
    (American Psychological Association, 2019-03-21) Vachon, François; Labonté, Katherine; Tremblay, Sébastien
    In complex dynamic work environments, the consequences of task interruptions on performance can put public safety at risk. If not designed carefully, current tools aiming to facilitate interruption recovery can instead hamper performance because of information overload. Although a simpler solution—the forewarning of an imminent interruption—has proven effective in static contexts, existing theories of task interruption do not clearly predict its impact on the resumption of dynamically evolving tasks. The current study examined the effects of a preinterruption warning in dynamic settings to develop a better understanding of task resumption and supplement current theoretical accounts. In a simulation of above-water warfare, scenarios were either uninterrupted, unexpectedly interrupted, or interrupted following an auditory warning. Behavioral, oculomotor, and pupillometric data regarding decision making, information processing, and cognitive load were computed before, during, and after each interruption (or the corresponding moment). Interruption warnings triggered a cognitively demanding preinterruption preparation that, in turn, speeded up postinterruption information processing and decision making and lowered cognitive load when resuming the interrupted task. These findings help to complement current theories of interruptions while showing that preinterruption warnings represent a promising way to support interruption recovery in complex dynamic situations.