C04

Phonetic indices of syllabic organization: The crucial role of variability

PI(s): Prof. Dr. Adamantios Gafos

This project considers variability deriving from two sources, the articulatory motor system and language-particular linguistic structure. In the first funding period, we assessed if and how much of the observed variability derives from one or the other source and developed an approach that harnesses this variability to diagnose syllabic organization from the speech signal. The present project expands the empirical terrain of our studies, addresses a key related methodological issue which has remained stagnant for the last 25 years, and pursues the perceptual consequences of variability in the articulatory patterns established in our previous work in the first funding phase.

in phase 1:

Interval-based indices of syllabic structure: The crucial role of variability

PI(s): Prof. Dr. Adamantios Gafos

This project considers sources of variability in speech deriving from two domains: the motor system and language-particular linguistic structure. In our empirical domain of interest, phonological and specifically syllabic organization, we wish to assess what aspects (and how much) of the observed variability derives from one or the other source. Dancing offers an apt metaphor: some properties of any given dance must be due to properties of the motor system governing limb movements; others must be due to the culture-specific mode of dancing. A set of results that have been demonstrated in our phase 1 is as follows.

Syllabic organization is expressed in terms of relational properties among phonetic parameters, rather than in terms of some privileged parameter or ranges of values of individual parameters as has been assumed in prior work. This thesis has been developed on the basis of electromagnetic articulometry studies of German and Spanish syllable structure. In these studies, we have shown, first, that there are cases where the fixed parameters hypothesized in prior work to be indicative of syllabic organization fail to show the expected pattern, and, second, that different syllabic organizations exhibit different relations among phonetic parameters.

We argued in Phase 1 that variability is absolutely crucial in the diagnosis of phonological organization (syllabic structure) because it is only when individual parameters (are allowed to) vary that their relations can be discerned in the data. We have demonstrated this by our electromagnetic articulometry studies on German and specifically by showing that the presence of prosodic modifications in a sequence of segments (over which syllabic organization is assessed) enables a better diagnosis of syllabic organization. In contrast to prior work which has not always found evidence for syllabic organization in speech production data, we have shown that clear evidence for complex onset organization can be found in both German (and Spanish) syllable onsets when this relational perspective among phonetic parameters is pursued.

Finally, we investigated the validity of the two most well-known laws in movement science, Fitts’ law and the speed curvature law, in speech movements or repetitive syllables (of German and English talkers), under a much wider range of speech rate conditions than has been pursued in previous work. Using improved methods for extracting the relevant variables from the speech movement data, we have found stronger evidence for these laws than has been assumed so far. We have also begun to explore the dynamical organization underlying the control of speech movements in repetitive syllables, with results indicating that the control regime for the same sequence of phonemes may not be unique across speakers and rates.

Members

Du
Shihao Du
Campus GolmHaus 14, Raum 3.19
Gafos
Prof. Dr. Adamantios Gafos
Campus GolmHaus 14, Raum 3.15/3.16
(+49) 331 977-2777 E-Mail Link
Kuberski
Dr. Stephan Kuberski
Campus GolmHaus 14, Raum 1.33
(+49) 331 977-2578 E-Mail Link

Publications

  • Peer-Reviewed: Papers, Journals, Books, Articles of the CRC
  • Talk or Presentation: Talks, Presentations, Posters of the CRC
  • SFB-Related: not produced in connection with the CRC, but are thematically appropriate
  • Other: Papers, Journals, Books, Articles of the CRC, but not peer-reviewed
Author(s)TitleYearPublished inLinksType
Bürki, A., Viebahn, M., & Gafos, A. I.Plasticity and transfer in the sound system: exposure to syllables in production or perception changes their subsequent production.2020Language, Cognition and Neuroscience, 35(10), 1371-1393. DOI: 10.1080/23273798.2020.1782445Paper Data+Code Peer-Reviewed
Kuberski, S.R., & Gafos, A.I.The speed-curvature power law in tongue movements of repetitive speech.2019PLOS ONE, 14(3), e0213851. DOI: 10.1371/journal.pone.0213851Paper Data+Code Peer-Reviewed
Kuberski, S.R., & Gafos, A.I.Fitts’ law in tongue movements of repetitive speech.2019Phonetica, 78(1), 3-27 (2021). DOI: 10.1159/000501644Paper Data Peer-Reviewed
Gafos, A. I., & van Lieshout, P.Editorial: Models and Theories of Speech Production.2020Frontiers in Psychology, 11(1238). DOI: 10.3389/fpsyg.2020.01238Paper Peer-Reviewed
Gafos, A. I., Roeser, J., Sotiropoulou, S., Hoole, P., & Zeroual, C.Structure in mind, structure in vocal tract.2020Natural Language and Linguistic Theory, 38, 43-75. DOI: 10.1007/s11049-019-09445-yPaper Data+Code Peer-Reviewed
Gibson, M., Sotiropoulou, S., Tobin, S., & Gafos, A. I.Temporal Aspects of Word Initial Single Consonants and Consonants in Clusters in Spanish.2019Phonetica, 76(6), 448–478. DOI: 10.1159/000501508Paper Peer-Reviewed
Sotiropoulou, S., Gibson, M., & Gafos, A.Global organization in Spanish onsets.2020Journal of Phonetics, 82, 100995. DOI: 10.1016/j.wocn.2020.100995PrePrint Peer-Reviewed
Tobin, S., Gibson, M., Sotiropoulou, S., & Gafos, A. I.Articulatory Coordination in L2-Speakers of Spanish.2019S. Calhoun, P. Escudero, M. Tabain, & P. Warren (eds.), Proceedings of the 19th International Congress of Phonetic Sciences (ICPhS 2019) (pp. 3353-3357). Canberra: Australasian Speech Science and Technology Association Inc. *Paper Peer-Reviewed
Gafos, A.Stems in Arabic morphology and phonology.2017In E. Benmamoun & R. Bassiouney (Eds.), The Routledge Handbook of Arabic Linguistics (pp. 62-86). London: Routledge.SFB-Related
Gibson, M., Sotiropoulou, S., Tobin, S., & Gafos, A. On some temporal properties of Spanish consonant-liquid and consonant rhotic clusters.2018In M. Belz, C. Mooshammer, S. Fuchs, S. Jannedy, O. Rasskazova, & M. Żygis (Eds.), Proceedings of the Conference on Phonetics & Phonology in German-speaking Countries (P&P13) (pp. 73-76). Berlin: Humoldt-Universität zu Berlin. DOI: 10.18452/18805SFB-Related
Williams, D., Escudero, P., & Gafos, A. Spectral change and duration as cues in Australian English listeners' front vowel categorization.2018The Journal of the Acoustical Society of America, 144(3), EL215 (2018). DOI: 10.1121/1.5055019SFB-Related
Williams, D., Escudero, P., & Gafos, A.Perceptual Sensitivity to Spectral Change in Australian English Close Front Vowels: An Electroencephalographic Investigation.2018Proceedings of Interspeech 2018 (pp. 1442-1446). Hyderabad, India. DOI: 10.21437/Interspeech.2018-2505SFB-Related
Gafos, A. I.Sound Patterns In Language: Information, Dynamics, Rules.2020Invited talk at the Abralin ao Vivo - Linguistics Online, 13 July. Retrieved from http://aovivo.abralin.org/en/lives/adamantios-gafos-2/Talk or Presentation
Gafos, A. I.Articulatory Phonology and Grammar.2019Plenary talk at the Workshop ''Advancing Research in Phonology via Articulatory Phonology'', organized under the auspices of the National Science Foundation (USA), Asilomar, Los Angeles, CA, USA. 12 - 14 July.Talk or Presentation
Kuberski, S., & Gafos, A. I. On the speed-accuracy trade-of and speed-curvature power law of tongue movements in repetitive speech.2018Paper presented at the LabPhon16 - Variation, development and impairment: Between phonetics and phonology, University of Lisbon, Lisbon, Portugal. 19 - 22 June.Talk or Presentation
Kuberski, S., & Gafos, A. I. Dynamics and kinematics of repetitive speech movements.2017Poster presented at the 7th International Conference on Speech Motor Control, Groningen, The Netherlands. 05 - 08 July.Paper Talk or Presentation
Sotiropoulou, S., Gibson, M., Tobin, S. J., & Gafos, A. I.Temporal stability patterns of stop-liquid and stop-rhotic clusters in Spanish.2018Poster presented at the LabPhon16 - Variation, development and impairment: Between phonetics and phonology, University of Lisbon, Lisbon, Portugal. 19 - 22 June.Paper Talk or Presentation
Roon, K. D., Hoole, P., Zeroual, C., Du, S., & Gafos, A. I.Stiffness and articulatory overlap in Moroccan Arabic consonant clusters.2021Laboratory Phonology, 12(1), 8. DOI: 10.5334/labphon.272Paper Data CodePeer-Reviewed
Sotiropoulou, S., & Gafos, A. I.Phonetic indices of syllabic organization in German stop-lateral clusters.2022Laboratory Phonology, 13(1), 1-42 DOI: 10.16995/labphon.6440Paper Peer-Reviewed
Lialiou, M., Sotiropoulou, S., & Gafos, A. I.Spatiotemporal coordination in word-medial stop-lateral and s-stop clusters of American English.2021Phonetica, 78(5-6), 385-433. DOI: 10.1515/phon-2021-2010Paper Data+Code Peer-Reviewed
Gafos, A. I.Entropic bases for artificial grammar learning and infant mispronounciation studies.2022Invited talk at the Linguistics Department Colloquium, Cornell University, USA, 28 April (Online)Talk or Presentation
Du, S., & Gafos, A.I.Flexibility and abstractness of articulatory coordination in German and Spanish word-initial stop-lateral clusters.2022Poster presented at the 8th International Conference on Speech Motor Control (SMC2022), Groningen, The Netherlands, 24 - 27 August. Talk or Presentation
Du, S.Articulatory overlap as a function of stiffness in German, English and Spanish word-initial stop-lateral clusters.2022Poster presented at the Summer School “Coping with the complexity in speech production and perception”, Chorin, Germany. 04 - 08 July.Talk or Presentation
Du, S., & Gafos, A. I.Articulatory overlap as a function of stiffness in German, English and Spanish word-initial stop-lateral clusters.2023Laboratory Phonology. Journal of the Association for Laboratory Phonology, 14(1). DOI: 10.16995/labphon.7965Paper Peer-Reviewed
Du, S., Kuberski, S. R., & Gafos, A. I. How measures of gestural overlap relate to dynamics: evidence from German and English word-initial stop-lateral clusters.2023In: Radek Skarnitzl & Jan Volín (Eds.), Proceedings of the 20th International Congress of Phonetic Sciences (pp. 2169-2173). Guarant International.Paper Peer-Reviewed
Kuberski, S. R., & Gafos, A. I.Assessing kinematic relations with high speech rate resolution data.2023In: Radek Skarnitzl & Jan Volín (Eds.), Proceedings of the 20th International Congress of Phonetic Sciences (pp. 962-966). Guarant International.Paper Peer-Reviewed

Contact:

University of Potsdam
Department Linguistics
Prof. Dr. Doreen Georgi
Karl-Liebknecht-Strasse 24-25
House 14, Room 3.33
14476 Potsdam

(+49) 331 977-2968
doreen.georgi@uni-potsdam.de
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