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• W2317628222 abstract "Event Abstract Back to Event The benefit of two? : An investigation of concurrent segregation in Autistic Spectrum Disorder using the dichotic pitch paradigm. Veema Lodhia1, 2*, Blake Johnson3, 4, Jon Brock3, 4, Jeffrey Hamm1, 2 and Michael Hautus1, 2 1 University of Auckland, School of Psychology, New Zealand 2 University of Auckland, Centre for Brain Research, New Zealand 3 Macquarie University, Department of Cognitive Science, Australia 4 ARC Centre of Excellence in Cognition and its Disorders, Australia Time and amplitude-shifted dichotic pitch (DP) elicits the Object Related Negativity (ORN; associated with object segregation) and Positive 400 (P400; associated with response formation) components in the auditory event related potential (AERP). Our recent work shows that autistics, when compared to matched typicals, do not exhibit the ORN but do exhibit a P400 component, when listening to time-shifted DP stimuli. Studies have shown that the addition of an extra auditory cue gives rise to improved detection for DP stimuli. The aim of this study was to investigate whether presentation of stimuli containing an interaural amplitude difference (IAD) cue in addition to an interaural time difference (ITD) cue would improve detection and increase the amplitude of the ORN for autistic individuals compared to typicals. Participants were fifteen adults (20-47 years) with autistic spectrum disorder (ASD) and fifteen matched typicals. A mixture of time-shifted, amplitude-shifted, and time-and-amplitude-shifted dichotic pitch control (one object) and target (two objects) stimulus types were presented. IAD cues alone elicited the ORN for both groups. However, addition of the IAD cue to the ITD cue did not significantly increase the ORN amplitude for the ASDs. In contrast the typical group benefited from the addition of the IAD cue; the ORN amplitude was increased but only when the IAD cue was presented ipsilateral to the ITD cue. When the cues were presented contralaterally, the ASD and typical groups obtained ORNs in opposite hemispheres. When ITD was presented alone, the ASDs exhibited a diminished ORN compared to typicals. The ASDs are able to successfully segregate concurrent sound information using IAD cue information. However, the ITD cue alone or in addition to the IAD cue appears to be difficult for the ASDs to utilize for segregation, and may be linked to temporal processing deficit for the ASDs. The controls benefited the most from the addition of the ITD cue. Keywords: Electroencephalography, autism, auditory scene analysis, event related potential, binaural processing, Object related negativity, Dichotic pitch Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Sensation and Perception Citation: Lodhia V, Johnson B, Brock J, Hamm J and Hautus M (2015). The benefit of two? : An investigation of concurrent segregation in Autistic Spectrum Disorder using the dichotic pitch paradigm.. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00220 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Miss. Veema Lodhia, University of Auckland, School of Psychology, Auckland, New Zealand, v.lodhia@auckland.ac.nz Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Veema Lodhia Blake Johnson Jon Brock Jeffrey Hamm Michael Hautus Google Veema Lodhia Blake Johnson Jon Brock Jeffrey Hamm Michael Hautus Google Scholar Veema Lodhia Blake Johnson Jon Brock Jeffrey Hamm Michael Hautus PubMed Veema Lodhia Blake Johnson Jon Brock Jeffrey Hamm Michael Hautus Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page." @default.
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• W2317628222 title "The benefit of two? : An investigation of concurrent segregation in Autistic Spectrum Disorder using the dichotic pitch paradigm." @default.
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