Effects of Perceptual Load and Socially Meaningful Stimuli on Crossmodal Selective Attention in Autism Spectrum Disorder and Neurotypical samples

Tyndall, Ian, Ragless, Liam and O'Hora, Denis (2018) Effects of Perceptual Load and Socially Meaningful Stimuli on Crossmodal Selective Attention in Autism Spectrum Disorder and Neurotypical samples. Consciousness and Cognition, 60. pp. 25-36. ISSN 1053-8100

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Abstract

The present study examined whether increasing visual perceptual load differentially affected both Socially Meaningful and Non-socially Meaningful auditory stimulus awareness in neurotypical (NT, n = 59) adults and Autism Spectrum Disorder (ASD, n = 57) adults. On a target trial, an unexpected critical auditory stimulus (CAS), either a Non-socially Meaningful (‘beep’ sound) or Socially Meaningful (‘hi’) stimulus, was played concurrently with the presentation of the visual task. Under conditions of low visual perceptual load both NT and ASD samples reliably noticed the CAS at similar rates (77%-81%), whether the CAS was Socially Meaningful or Non-socially Meaningful. However, during high visual perceptual load NT and ASD participants reliably noticed the meaningful CAS (NT = 71%, ASD = 67%), but NT participants were unlikely to notice the Non-meaningful CAS (20%), whereas ASD participants reliably noticed it (80%), suggesting an inability to engage selective attention to ignore non-salient irrelevant distractor stimuli in ASD.

Item Type: Article
Uncontrolled Keywords: Autism Spectrum Disorder, Selective attention, Inattentional deafness, Perceptual load, Load theory, Cross modal attention
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Divisions: Departments > Psychology and Counselling
Related URLs:
Depositing User: Ian Tyndall
Date Deposited: 05 Apr 2018 11:56
Last Modified: 12 Apr 2018 14:19
URI: http://eprints.chi.ac.uk/id/eprint/3377

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