Spatial and Temporal Lingual Coarticulation and Motor Control in Preadolescents
| Autor: | Robin J. Lickley, Natalia Zharkova, Nigel Hewlett, William J. Hardcastle |
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| Rok vydání: | 2014 |
| Předmět: |
Adult
Male Linguistics and Language medicine.medical_specialty Adolescent Movement Audiology Efferent Pathways Speech Acoustics Language and Linguistics Young Adult Speech and Hearing Child Development Tongue Phonetics Vowel medicine Humans Speech Symptom onset Child Coarticulation Ultrasonography Communication Age differences business.industry Motor control Adolescent Development Middle Aged Biomechanical Phenomena medicine.anatomical_structure Female Adolescent development Psychology business |
| Zdroj: | Journal of Speech, Language, and Hearing Research. 57:374-388 |
| ISSN: | 1558-9102 1092-4388 |
| Popis: | PurposeIn this study, the authors compared coarticulation and lingual kinematics in preadolescents and adults in order to establish whether preadolescents had a greater degree of random variability in tongue posture and whether their patterns of lingual coarticulation differed from those of adults.MethodHigh-speed ultrasound tongue contour data synchronized with the acoustic signal were recorded from 15 children (ages 10–12 years) and 15 adults. Tongue shape contours were analyzed at 9 normalized time points during the fricative phase of schwa-fricative-/a/ and schwa-fricative-/i/ sequences with the consonants /s/ and /ʃ/.ResultsThere was no significant age-related difference in random variability. Where a significant vowel effect occurred, the amount of coarticulation was similar in the 2 groups. However, the onset of the coarticulatory effect on preadolescent /ʃ/ was significantly later than on preadolescent /s/, and also later than on adult /s/ and /ʃ/.ConclusionsPreadolescents have adult-like precision of tongue control and adult-like anticipatory lingual coarticulation with respect to spatial characteristics of tongue posture. However, there remains some immaturity in the motor programming of certain complex tongue movements. |
| Databáze: | OpenAIRE |
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