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Neurophysiological correlates of word recognition in noise in adults and children.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Neurophysiological correlates of word recognition in noise in adults and children./
Author:	Walker, Nicholas K.
Description:	1 online resource (139 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
Subject:	Speech therapy. -
Online resource:	click for full text (PQDT)
ISBN:	9781339036984

Neurophysiological correlates of word recognition in noise in adults and children.
Walker, Nicholas K.

Neurophysiological correlates of word recognition in noise in adults and children. - 1 online resource (139 pages)

Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2015.

Includes bibliographical references

During auditory processing of linguistic information listeners must overcome many challenges in order to interpret the meaning of the spoken language. Speech is rarely delivered without noise, and the auditory system must rapidly interpret the incoming speech signal. In this study I examined the effects of multitalker babble on speech perception in typical adults and children during a word recognition task. Continuous EEG was collected from 64 scalp channels while participants completed the tasks. EEG for each participant were analyzed using a continuous wavelet transform (CWT) using a fast-Fourier convolution. CWTs were computed at 256 log-spaced frequencies ranging from 3Hz to 100Hz. Intertrial phase clustering was computed across conditions. ITPC profiles were computed separately for noise and non-noise conditions, and statistical tests were performed for comparison.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781339036984Subjects--Topical Terms:

715798
Speech therapy.
Index Terms--Genre/Form:

554714
Electronic books.

Neurophysiological correlates of word recognition in noise in adults and children.
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100 1 $a Walker, Nicholas K. $3 1186774
245 1 0 $a Neurophysiological correlates of word recognition in noise in adults and children.
264 0 $c 2015
300 $a 1 online resource (139 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
500 $a Adviser: Phillip M. Gilley.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2015.
504 $a Includes bibliographical references
520 $a During auditory processing of linguistic information listeners must overcome many challenges in order to interpret the meaning of the spoken language. Speech is rarely delivered without noise, and the auditory system must rapidly interpret the incoming speech signal. In this study I examined the effects of multitalker babble on speech perception in typical adults and children during a word recognition task. Continuous EEG was collected from 64 scalp channels while participants completed the tasks. EEG for each participant were analyzed using a continuous wavelet transform (CWT) using a fast-Fourier convolution. CWTs were computed at 256 log-spaced frequencies ranging from 3Hz to 100Hz. Intertrial phase clustering was computed across conditions. ITPC profiles were computed separately for noise and non-noise conditions, and statistical tests were performed for comparison.
520 $a Adults and children both had significant effects of noise on the N1 component, while neither had effects of noise on the P3 component amplitude suggesting that early components are more important for speech perception in noise. Phonotactic probability had an effect on the P3 component at the left temporal electrode site. While word frequency and noise had an effect on the earlier N1 component. The adults showed a significant effect of noise versus quiet in ITPC of the alpha and theta frequency ranges following stimulus onsets at temporal channel regions, which may suggest a slight right hemisphere dominance for processing in noise. Children show a similar pattern; however, the ITPC for children are not significant at the group level in the left hemisphere, which suggests that phase clustering is developing from right to left. This suggests that children are still developing consistent processing mechanisms and that they may have more temporal jitter in the phase onset of alpha and theta oscillations. These results highlight the importance limiting noise for speech perception and processing in typically developing children to improve auditory speech perception, and likely have implications for children with language learning difficulties depending on how there auditory system develops.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Speech therapy. $3 715798
650 4 $a Neurosciences. $3 593561
655 7 $a Electronic books. $2 local $3 554714
690 $a 0460
690 $a 0317
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Colorado at Boulder. $b Speech, Language and Hearing Sciences. $3 1185307
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3721902 $z click for full text (PQDT)