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The Effects of Linguistic and Non-li...

Stanley, Nicholas S.

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The Effects of Linguistic and Non-linguistic Masking on Auditory Event-Related Potentials Related to Semantic Processing: An Aging Study.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Effects of Linguistic and Non-linguistic Masking on Auditory Event-Related Potentials Related to Semantic Processing: An Aging Study./
作者:	Stanley, Nicholas S.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	150 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-10, Section: B.
Contained By:	Dissertations Abstracts International80-10B.
標題:	Audiology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13862658
ISBN:	9781392072295

The Effects of Linguistic and Non-linguistic Masking on Auditory Event-Related Potentials Related to Semantic Processing: An Aging Study.
Stanley, Nicholas S.

The Effects of Linguistic and Non-linguistic Masking on Auditory Event-Related Potentials Related to Semantic Processing: An Aging Study. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 150 p.

Source: Dissertations Abstracts International, Volume: 80-10, Section: B.

Thesis (Ph.D.)--University of South Alabama, 2019.

This item must not be sold to any third party vendors.

Suprathreshold repetition and recognition level tasks have illustrated age-related differences in linguistic and non-linguistic masking effects; however, these effects at the semantic processing level are unclear. Repetition and recognition tasks intentionally limit higher order, cognitive processes which potentially play a greater role in speech understanding. In order to incorporate linguistic and cognitive processes associated with speech understanding in complex listening environments, this study used a semantic judgment in noise task where participants were asked to make a decision based on a heard word pair. The purpose of this study was to determine if middle-aged adults were more negatively affected by linguistic masking than non-linguistic masking during semantic processing when compared to young adults as indicated by behavioral and auditory event-related potential (AERP) measures. During the semantic judgment in noise task, participants indicated via button press whether word pairs were semantically related or unrelated. This task was performed in 3 listening conditions: quiet, forward presented two-talker speech competition, and reverse presented two-talker speech competition. Participants for this study were 16 young adults (19-31 years) and 16 middle-aged adults (41-57 years) with normal hearing sensitivity. Behavioral measures of accuracy and reaction time were analyzed using a mixed design multivariate analysis of variances. AERP measures of mean amplitudes and peak latencies for the N400 and late positive component (LPC) were analyzed using separate mixed design analysis of variances. Although behavioral data did not indicate any age-related differences on the effects of linguistic and non-linguistic masking during semantic processing, mean N400 amplitudes and peak LPC latencies illustrated subtle age-related differences in linguistic and cognitive processes during the semantic judgment in noise task. Mean N400 amplitudes indicated that young and middle-aged adults had similar depths of processing for semantically related word pairs; however, depth of processing for semantically unrelated word pairs were reduced for middle-aged adults compared to young adults. Additionally, mean N400 amplitudes for semantically related word pairs were more negative as a result of linguistic and non-linguistic masking while amplitudes for semantically unrelated word pairs were not influenced by either masker. LPC latencies suggested that middle-aged adults were negatively affected by competition while LPC latencies for young adults were not significantly different. AERP measures did not reveal a significant difference between either masker; however, reaction times were longer in linguistic than non-linguistic masking. While the effects of linguistic and non-linguistic masking on the semantic judgment in noise tasks were similar between young and middle-aged adults, AERP measures did reveal age-related differences in linguistic and cognitive processing as a result of competition. Findings from this study highlight the utility of a semantic processing task and AERP measures to identify age-related differences in linguistic and cognitive processing in complex listening environments that may not be evident in suprathreshold repetition/recognition task or behavioral data.

ISBN: 9781392072295Subjects--Topical Terms:

537237
Audiology.
Subjects--Index Terms:

Aging

The Effects of Linguistic and Non-linguistic Masking on Auditory Event-Related Potentials Related to Semantic Processing: An Aging Study.
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