How the deployment of visual attention modulates auditory distraction. / Marsh, John E; Campbell, Tom A; Taylor, Paul J; Vachon, Francois; *Hughes , R.W.

In: Attention, Perception, & Psychophysics, 10.06.2019.

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  • John E Marsh
  • Tom A Campbell
  • Paul J Taylor
  • Francois Vachon
  • R.W. *Hughes

Abstract

Classically, attentional selectivity has been conceptualized as a passive by-product of capacity-limits on stimulus-processing. Here, we examine the role of more active cognitive control processes in attentional selectivity, focusing on how distraction from task-irrelevant sound is modulated by levels of task-engagement in a visually-presented short-term memory task. Task-engagement was varied by manipulating the load involved in the encoding of the (visually-presented) to-be-remembered items. Using a list of Navon letters (where a large
letter is composed of smaller, different-identity, letters), participants were oriented to attend and serially recall the list of large letters (low encoding-load) or to attend and serially recall the list of small letters (high encoding-load). Attentional capture by a single deviant noise-burst within a task-irrelevant tone sequence (the deviation effect) was eliminated under high encoding-load (Experiment 1). However, distraction from a continuously changing sequence of tones (the changing-state effect) was immune to the influence of load (Experiment 2). This dissociation in the amenability of the deviation effect and the changing-state effect to cognitive control supports a duplex- over a unitary-mechanism account of auditory distraction in which the deviation effect is due to attentional capture while the changing-state effect reflects direct interference between the processing of the sound and processes involved in the focal task. That the changing-state effect survives high encoding-load also goes against an alternative explanation of the attenuation of the deviation effect under high load in terms of the depletion of a limited perceptual resource that would result in diminished auditory processing.
Original languageEnglish
JournalAttention, Perception, & Psychophysics
Publication statusAccepted/In press - 10 Jun 2019

ID: 34030007