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Correlates to intelligibility in deviant child speech – comparing clinical evaluations to audience response system-based evaluations by untrained listeners
KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Speech Communication and Technology.
2013 (English)In: Proceedings of Interspeech 2013, Lyon, France, 2013, 3717-3721 p.Conference paper (Refereed)
Abstract [en]

The severity of speech impairments can be measured in different ways; whereas some metrics focus on quantifying the specific speech deviations, other focus on the functional effects of the speech impairment, e.g. by rating intelligibility. This report describes the application of a previously untested method to the domain of deviant child speech; an audience response system-based method where listeners’ responses are continuously registered during playback of speech stimuli. 20 adult listeners were given the task of clicking a button whenever they perceived something unintelligible or deviant during playback of child speech stimuli. The untrained listeners’ responses were compared to clinical evaluations of the same speech samples, revealing a strong correlation between the two types of measures. Furthermore, patterns of how listeners’ different experiences influence their clicking responses were explored. Qualitative analysis linking listener clicks to triggering events in the speech samples demonstrates the potential of the click method as an instrument for identification of features in children’s speech that are most detrimental to intelligibility – insights that may have important implications for the selection of speech targets in clinical intervention.

Place, publisher, year, edition, pages
Lyon, France, 2013. 3717-3721 p.
National Category
Computer Science Language Technology (Computational Linguistics)
URN: urn:nbn:se:kth:diva-137390ScopusID: 2-s2.0-84906214991OAI: diva2:678920
Interspeech 2013

tmh_import_13_12_13, tmh_id_3858. QC 20140317

Available from: 2013-12-13 Created: 2013-12-13 Last updated: 2014-03-17Bibliographically approved
In thesis
1. The /k/s, the /t/s, and the inbetweens: Novel approaches to examining the perceptual consequences of misarticulated speech
Open this publication in new window or tab >>The /k/s, the /t/s, and the inbetweens: Novel approaches to examining the perceptual consequences of misarticulated speech
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis comprises investigations of the perceptual consequences of children’s misarticulated speech – as perceived by clinicians, by everyday listeners, and by the children themselves. By inviting methods from other areas to the study of speech disorders, this work demonstrates some successful cases of cross-fertilization. The population in focus is children with a phonological disorder (PD), who misarticulate /t/ and /k/. A theoretical assumption underlying this work is that errors in speech production are often paralleled in perception, e.g. that children base their decision on whether a speech sound is a /t/ or a /k/ on other acoustic-phonetic criteria than those employed by proficient language users. This assumption, together with an aim at stimulating self-monitoring in these children, motivated two of the included studies. Through these studies, new insights into children’s perception of their own speech were achieved – insights entailing both clinical and psycholinguistic implications. For example, the finding that children with PD generally recognize themselves as the speaker in recordings of their own utterances lends support to the use of recordings in therapy, to attract children’s attention to their own speech production. Furthermore, through the introduction of a novel method for automatic correction of children’s speech errors, these findings were extended with the observation that children with PD tend to evaluate misarticulated utterances as correct when just having produced them, and to perceive inaccuracies better when time has passed. Another theme in this thesis is the gradual nature of speech perception related to phonological categories, and a concern that perceptual sensitivity is obscured in descriptions based solely on discrete categorical labels. This concern is substantiated by the finding that listeners rate “substitutions” of [t] for /k/ as less /t/-like than correct productions of [t] for intended /t/. Finally, a novel method of registering listener reactions during the continuous playback of misarticulated speech is introduced, demonstrating a viable approach to exploring how different speech errors influence intelligibility and/or acceptability. By integrating such information in the prioritizing of therapeutic targets, intervention may be better directed at those patterns that cause the most problems for the child in his or her everyday life.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2014. xiii, 105 p.
TRITA-CSC-A, ISSN 1653-5723 ; 2014:03
speech perception, speech disorders, speech synthesis, speech analysis
National Category
Specific Languages
Research subject
Speech and Music Communication
urn:nbn:se:kth:diva-143102 (URN)ISBN-978-91-7595-050-1 (ISBN)
Public defence
2014-04-07, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)

QC 20140317

Available from: 2014-03-17 Created: 2014-03-17 Last updated: 2014-03-17Bibliographically approved

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