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Speech versus non-speech as irrelevant sound: Controlling acoustic variation


Little, J and Martin, F and Thomson, RH, Speech versus non-speech as irrelevant sound: Controlling acoustic variation, Biological Psychology, 85, (1) pp. 62-70. ISSN 0301-0511 (2010) [Refereed Article]

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DOI: doi:10.1016/j.biopsycho.2010.05.004


Functional differences between speech and non-speech within the irrelevant sound effect were investigated using repeated and changing formats of irrelevant sounds in the form of intelligible words and unintelligible signal correlated noise (SCN) versions of the words. Event-related potentials were recorded from 25 females aged between 18 and 25 while they completed a serial order recall task in the presence of irrelevant sound or silence. As expected and in line with the changing-state hypothesis both words and SCN produced robust changing-state effects. However, words produced a greater changing-state effect than SCN indicating that the spectral detail inherent within speech accounts for the greater irrelevant sound effect and changing-state effect typically observed with speech. ERP data in the form of N1 amplitude was modulated within some irrelevant sound conditions suggesting that attentional aspects are involved in the elicitation of the irrelevant sound effect.

Item Details

Item Type:Refereed Article
Research Division:Psychology
Research Group:Biological psychology
Research Field:Behavioural neuroscience
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in psychology
UTAS Author:Little, J (Mr Jeremy Little)
UTAS Author:Martin, F (Associate Professor Frances Martin)
UTAS Author:Thomson, RH (Dr Richard Thomson)
ID Code:66443
Year Published:2010
Web of Science® Times Cited:7
Deposited By:Psychology
Deposited On:2011-01-25
Last Modified:2014-12-18

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