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Age-Related Differences in the Effects of Cognitive Demand on Speech Production

Title: Age-Related Differences in the Effects of Cognitive Demand on Speech Production.
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Name(s): Roa, Maria, author
Type of Resource: text
Genre: Text
Bachelor Thesis
Date Issued: 2017-12-08
Physical Form: computer
Physical Form: online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The present investigation examined the effects of aging and cognitive workload on speech production using temporal and frequency measures of acoustics. The following hypotheses were made: older speakers will have longer phoneme durations than will younger speakers; older speakers will have shorter F2-transitions and smaller F2-transition frequency extents than will younger speakers; all speakers will exhibit greater proportional changes to these measures under increased cognitive workload conditions. Eight adults, four younger and four older, equally matched for sex, participated. They completed a sentence-level Stroop task in two cognitive workload conditions: low cognitive load (congruent Stroop condition) and high cognitive load (incongruent Stroop condition). Participants produced the sentence sixteen times, eight productions for both conditions. Plosive-vowel syllables that came before the Stroop-segment, at the Stroop-segment, and after the Stroop-segment of the sentence were selected for measurement from each sentence production. All speakers exhibited longer phoneme durations before and at the Stroop-segment in comparison to afterwards. Speakers also exhibited longer and more extensive vowel transitions before and at the Stroop-segment in comparison to the post-Stroop segment. In the incongruent condition, the Stroop-segment had longer F2-transition durations. The older adults had longer F2-transitions than the younger adults. The F2-transition frequency extent was greatest at the Stroop-segment. The older adults had wider F2-transitions at the Stroop-segment that further widened during incongruent conditions. These results suggest that the effects of speaker anticipation of the cognitive task were manifested by speech adaptations that occurred as a function of the word’s position in the sentence.
Identifier: FSU_libsubv1_scholarship_submission_1512768944_cf5eca01 (IID)
Keywords: acoustics, cognitive workload, vowel duration, age-related differences, locus equation, F2 transitions
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1512768944_cf5eca01
Owner Institution: FSU

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Roa, M. (2017). Age-Related Differences in the Effects of Cognitive Demand on Speech Production. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1512768944_cf5eca01