Resources

The Core Model is a developmentally sensitive computational model of speech production. Core is based on a mathematical model that we built to demonstrate how discrete perceptual-motor units of speech motor control can emerge over developmental time within continuous perceptual and motor spaces (Davis & Redford, 2019). Along the way, we described the development of holistic motor wordform representations that we call silhouettes. Together with holistic perceptual wordform representations (e.g., exemplars), silhouettes define a speaker’s phonology. In other words, Core is a dual lexicon model of spoken language production. The computational version of the model assumes already discretized perceptual and motor spaces. The modeling focus is on what it means to integrate motor and perceptual wordforms within these spaces during production and how the process influences silhouette shape. We are also explore how production is possible in the absence of established silhouettes (e.g., nonsense word production). The model is built in MatLab (see https://github.com/mayaekd/core). Please cite Davis & Redford (2023) below when referencing the code.

The Eugene Children’s Story Corpus (ECSC) includes 367 audio recordings and transcriptions of structured spontaneous narratives elicited from a total of 188 typically-developing school-aged children and 26 adults (accompanying caregiver). The narratives were elicited using Mercer Mayer’s frog story picture books. Children were between 5 and 8 years old when they first participated in the study. Those who participated in the 3-year longitudinal portion of the study were between 7 and 10 years old at the end of the study. These children returned every year within 2 weeks of the date when they had last participated and so were on average exactly 12 months older in Year 2 of the study than in Year 1, and again exactly 12 months older in Year 3 of the study than in Year 2. Other typically developing school-aged children were also recruited throughout the study period. Data collection was completed during the 2012-13 academic year. The corpus is available through CHILDES (MacWhinney, 2000) at https://childes.talkbank.org/access/Frogs/English-ECSC.html. Please cite Kallay & Redford (2021) below when referencing the corpus.

Publications

2023

2022

Kallay, J.E., Dilley, L., & Redford, M.A. (2022). Prosodic development during the early school-aged years. Journal of Speech, Language, and Hearing Research. Published online Oct. 19, 2022. https://doi.org/10.1044/2022_JSLHR-22-00124 [PDF]

Redford, M.A. & Howson, P.J. (2022). Acoustic correlates and listener ratings of function word reduction in child versus adult speech. Journal of the Acoustical Society of America, 152, 1463. Published online Sept. 7, 2022. https://doi.org/10.1121/10.0013835 [PDF]

Howson, P.J. & Redford, M.A. (2022). A cross-sectional age group study of coarticulatory resistance: the case of late-acquired voiceless fricatives in English. Journal of Speech, Language, and Hearing Research. Published online Aug. 23, 2022. https://doi.org/10.1044/2022_JSLHR-21-00450 [PDF]

Potratz, J., Gildersleeve-Neumann, C.E., & Redford, M.A. (2022). Measurement Properties of Mean Length of Utterance (MLU) in School-Aged Children. Language, Speech, and Hearing Services in Schools. Published online Aug. 5, 2022. https://doi.org/10.1044/2022_LSHSS-21-00115 [PDF]

2021

Howson, P.J. & Redford, M.A. (2021). The acquisition of articulatory timing for liquids: evidence from anticipatory coarticulation. Journal of Speech, Language, and Hearing Research, 64(3), 734-753. Published online March 1, 2021. doi: 10.1044/2020_JSLHR-20-00391 [PDF]

Howson, P.J., Kallay, J.E., Redford, M.A. (2021). A psycholinguistic method for measuring coarticulation in child and adult speech. Behavior Research Methods, 53(2), 846-863. Published online Sept. 1, 2020. doi: 10.3758/s13428-020-01464-7 [PDF]

Kallay, J.E. & Redford, M.A. (2021). Clause-initial AND usage in a cross-sectional and longitudinal corpus of school-age children’s narratives. Journal of Child Language, 48(1), 88-109. Published online April 23, 2020. doi: 10.1017/S0305000920000197 [PDF] Eugene Children’s Story Corpus (ECSC)

2020

Chen, A., Esteve-Gibert, N., Prieto, P., Redford, M.A. (2020). Development in phrasal prosody from infancy to late childhood. In C. Guessenhoven & A. Chen (eds.), Oxford handbook of language prosody, (pp. 553-562). OUP.

Jasso, J., & Potratz, J. R. (2020). Assessing speech sound disorders in school-age children from diverse language backgrounds: A tutorial with three case studies. Perspectives of the ASHA Special Interest Groups. Published online May 13, 2020. doi.org/10.1044/2020_PERSP-19-00151. [PDF]

2019

Adkins, J., Gildersleeve-Neumann, C., & Redford, M.A. (2019). Metrical constraints on articulatory timing in connected speech development. In S. Calhoun, P. Escudero, M. Tabain & P. Warren (eds.) Proceedings of the 19th International Congress of Phonetic Sciences, Melbourne, Australia 2019 (pp. 840-44). Canberra, Australia: Australasian Speech Science and Technology Association Inc. [PDF]

Davis, M., & Redford, M.A. (2019). The emergence of discrete perceptual-motor units in a production model that assumes holistic phonological representations. Frontiers in Psychology, Language Sciences, 10, 2121, doi: 10.3389/fpsyg.2019.02121. [PDF]

Howson, P., & Redford, M.A. (2019). Listener preference is for reduced determiners that anticipate the following noun. In S. Calhoun, P. Escudero, M. Tabain & P. Warren (eds.) Proceedings of the 19th International Congress of Phonetic Sciences, Melbourne, Australia 2019 (pp. 378-82). Canberra, Australia: Australasian Speech Science and Technology Association Inc. [PDF]

Howson, P., & Redford, M.A. (2019). Liquid coarticulation shows the context-dependent nature of articulatory timing development. In S. Calhoun, P. Escudero, M. Tabain & P. Warren (eds.) Proceedings of the 19th International Congress of Phonetic Sciences, Melbourne, Australia 2019 (pp. 3100-04). Canberra, Australia: Australasian Speech Science and Technology Association Inc. PDF

Kallay, J., Mayr, U. & Redford, M.A. (2019). Characterizing the coordination of speech production and breathing. In S. Calhoun, P. Escudero, M. Tabain & P. Warren (eds.) Proceedings of the 19th International Congress of Phonetic Sciences, Melbourne, Australia 2019 (pp. 1412-16). Canberra, Australia: Australasian Speech Science and Technology Association Inc. PDF

Redford, M.A. (2019). Speech production from a developmental perspective. Journal of Speech, Language, and Hearing Research, 62, 2946–2962. doi: 10.1044/2019_JSLHR-S-CSMC7-18-0130 [PDF]

2018

Redford, M.A., Kallay, J., Bogdanov, S., & Vatikiotis-Bateson, E. (2018). Leveraging audiovisual speech perception to measure anticipatory coarticulation. Journal of the Acoustical Society of America, 144, 2447-2461. https://asa.scitation.org/doi/10.1121/1.5064783 [PDF]

Kallay, J., & Redford, M.A. (2018). Coarticulatory effects on “the” production in child and adult speech. Proc. 9th International Conference on Speech Prosody 2018, 1004-1007, DOI: 10.21437/SpeechProsody.2018-203. [PDF]

Redford, M.A. (2018). Grammatical word production across metrical contexts in school-aged children’s and adults’ speech. Journal of Speech, Language, and Hearing Research, 61, 1339-1354. [PDF]

Redford, M.A., Kapatsinski, V., & Cornell-Fabiano, J. (2018). Lay listener classification and evaluation of typical and atypical children’s speech. Language and Speech, 61, 127-138. First published date: July-28-2017 https://doi.org/10.1177/0023830917717758 [PDF]

2017

Redford, M.A. & Oh, G. (2017). The representation and execution of articulatory timing in first and second language acquisition. Journal of Phonetics, 63, 127-138. http://dx.doi.org/10.1016/j.wocn.2017.01.004 [PDF]

Redford, M.A. (2017). Sound categories or phonemes? British Journal of Psychology, 108, 34-36. https://onlinelibrary.wiley.com/doi/abs/10.1111/bjop.12227

Kapatsinski, V., Olejarczuk, P., & Redford, M.A. (2017). Perceptual learning of intonation contour categories in adults and 9- to 11-year-old children: adults are more narrow-minded. Cognitive Science, 41, 383-415. doi: 10.1111/cogs.12345 [PDF]

2016

Kallay, J., & Redford, M.A. (2016). A longitudinal study of children’s intonation in narrative speech. INTERSPEECH 2016, 17th Annual Conference of the International Speech Communication Association, San Francisco, CA USA, September 8-12, 2016. ISSN 1990-9770. [PDF]

Redford, M.A., & Oh, G. (2016). Children’s abstraction and generalization of English lexical stress patterns. Journal of Child Language, 43, 338-365. doi: 10.1017/S0305000915000215 [PDF]

2015

Redford, M.A. (2015). Unifying speech and language in a developmentally sensitive model of production. Journal of Phonetics, 53, 141-152. doi: 10.1016/j.wocn.2015.06.006.[PDF]

Lee, O., & Redford, M.A. (2015). Verbal and spatial working memory load have similarly minimal effects on speech production. In The Scottish Consortium for ICPhS 2015 (Ed.), Proceedings of the 18th International Congress of Phonetic Sciences. Glasgow, UK: The University of Glasgow. ISBN 978-0-85261-941-4. Paper number 0798, 5 pages. [PDF]

Redford, M.A. (2015). Introduction. In Redford, M.A. (ed.), The Handbook of Speech Production (pp. 1-10). Boston: Wiley-Blackwell. [PDF]

Redford, M.A. (2015). The acquisition of temporal patterns. In Redford, M.A. (ed.), The Handbook of Speech Production (pp. 379-403). Boston: Wiley-Blackwell. [PDF]

Redford, M.A., & Oh, G. (2015). Fixed temporal patterns in children’s speech despite variable vowel durations. In The Scottish Consortium for ICPhS 2015 (Ed.), Proceedings of the 18th International Congress of Phonetic Sciences. Glasgow, UK: The University of Glasgow. ISBN 978-0-85261-941-4. Paper number 0759, 5 pages. [PDF]

2014

Mayr, U., Kleffner, K., Kikumoto, A., & Redford, M.A. (2014). Control of task sequences: what is the role of language? Journal of Experimental Psychology: Learning, Memory, and Cognition, 40, 376-384. [PDF]

Redford, M.A. (2014). The perceived clarity of children’s speech varies as a function of their default speech rate. Journal of the Acoustical Society of America, 135, 2952-2963. [PDF]

Redford, M.A., Stine, J.N., & Vatikiotis-Bateson, E. (2014). A question of scope? Direct comparison of clear and in-focus speech productions. In S. Fuchs, M. Grice, A. Hermes, L. Lancia, & D. Mücke (eds.), Proceeding of the 10th International Seminar on Speech Production, (ISSP 2014 Cologne, Germany), pp. 352-355. [PDF]

Shport, I.A., & Redford, M.A. (2014). Lexical and phrasal prominence patterns in school-aged children’s speech. Journal of Child Language, 41, 890-912. doi:10.1017/S030500091300024X. [PDF]

2013

Choe, W-K., & Redford, M.A. (2013). The effect of interpretation bias on the production of disambiguating prosody. Proceeding of the 21st International Congress on Acoustics, (Montreal, Canada). International Commission for Acoustics. 5 pages. [PDF]

Dilley, L., Wieland, L., Gamache, J., McAuley, D., & Redford, M. (2013). Age-related changes to spectral voice characteristics affect judgments of prosodic, segmental, and talker attributes for child and adult speech. Journal of Speech, Language, and Hearing Research, 56, 159–177. [PDF]

Olejarczuk, P., & Redford, M.A. (2013). The relative contribution of rhythm, intonation and lexical information to the perception of prosodic disorder. Proceeding of the 21st International Congress on Acoustics, (Montreal, Canada). International Commission for Acoustics. 7 pages. [PDF]

Redford, M.A. (2013). A comparative analysis of pausing in child and adult storytelling. Applied Psycholinguistics, 34, 569-589. [PDF]

Sirsa, H., & Redford, M.A. (2013). The effects of native language on Indian English sounds and timing patterns. Journal of Phonetics, 41, 393-406. [PDF]

2012

Choe, W.K., & Redford, M.A. (2012). The relationship between speech errors and prosodic phrase boundaries. Laboratory Phonology, 3, 5-26. doi: 10.1515/lp-2012-0002 [PDF]

Maloney, E., Payne, D., & Redford, M.A. (2012). What children’s pause patterns indicate about their constituent structure. BUCLD 36 Proceedings Supplement. (http://www.bu.edu/bucld/proceedings/supplement). 12 pages.[PDF]

Oh, G., & Redford, M.A. (2012). The production and phonetic representation of fake geminates in English. Journal of Phonetics, 40, 82-91. [PDF]

Redford, M.A., Dilley, L.C., Gamache, J.L., & Weiland, E.A. (2012). Prosodic marking of continuation versus completion in children’s narratives. INTERSPEECH 2012, 13th Annual Conference of the International Speech Communication Association, Portland, OR, USA, September 9-13, 2012 (pp. 2493-2496). ISSN 1990-9770. [PDF]

Redford. M.A., & Idemaru, K. (2012). In Memoriam: Susan Guion Anderson (1966–2011). Journal of the International Phonetic Association, 42, pp 251-252. doi:10.1017/ S0025100312000138. [PDF]

Shport, I.A. (2012). Children’s productions of multi-syllabic lexical stress patterns in different prosodic positions. INTERSPEECH 2012, 13th Annual Conference of the International Speech Communication Association, Portland, OR, USA, September 9-13, 2012 (pp. 2490-2493). ISSN 1990-9770. [PDF]

2011

Choe, W.K. (2011). In Lee, W.-S., Zee, E. (eds.), The distribution of speech errors in prosodic phrases in Korean. Proceedings from the 17th International Congress of Phonetic Sciences, (ICPhS-11 Hong Kong), pp. 480-483.[PDF]

Oh, G., Guion-Anderson, S.G., & Redford, M.A. (2011). Developmental change in factors affecting stress placement in native English-speaking children>. In Lee, W.-S., Zee, E. (eds.), Proceedings from the 17th International Congress of Phonetic Sciences, (ICPhS-11 Hong Kong), pp. 1522-1525. [PDF]

Redford, M.A., & Oh, G. (2011). Reproducing singletons and fake geminates. In Lee, W.-S., Zee, E. (eds.) Proceedings from the 17th International Congress of Phonetic Sciences, (ICPhS-11 Hong Kong), pp. 1674—77. [PDF]

Shport, I.A., & Redford, M.A. (2011). Interactions between lexical and phrasal prosody in school-aged children’s speech. In Lee, W.-S., Zee, E. (eds.), Proceedings from the 17th International Congress of Phonetic Sciences, (ICPhS-11 Hong Kong), pp. 1838-1841. [PDF]

Sirsa, H., & Redford, M.A. (2011). Towards understanding the protracted acquisition of English rhythm. In Lee, W.-S., Zee, E. (eds.), Proceedings from the 17th International Congress of Phonetic Sciences, (ICPhS-11 Hong Kong), pp. 1862-1865. [PDF]

2009

Redford, M.A., & Gildersleeve-Neumann, C.E. (2009). The development of distinct speaking styles in preschool children. Journal of Speech, Language, and Hearing Research, 52, 1434-1448. [PDF]

2008

Redford, M.A. (2008). Production constraints on learning novel onset phonotactics. Cognition, 107, 785-816. [PDF]

Redford, M.A., & van Donkelaar, P. (2008). Jaw cycles and linguistic syllables in adult English. In Davis, B.L., Zajdo, K. (eds.), The Syllable in Speech Production: Perspectives on the Frame/Content Theory (pp. 355-376). London: Taylor & Francis. [PDF]

2007

Doty, C., & Redford, M.A. (2007). Stress and boundary effects on anticipatory and preservatory nasal airflow. In Trouvain, J., Barry, W.J. (eds.), Proceedings from the 16th International Congress of Phonetic Sciences, (ICPhS-07 Saarbrücken, Germany), pp. 985-988. [PDF]

Redford, M.A. (2007). Word-internal versus word-peripheral consonantal duration patterns in three languages. Journal of the Acoustical Society of America, 121, 1665-1678. [PDF]

Redford, M.A., & Gildersleeve-Neumann, C.E. (2007). The acquisition of two phonetic cues to word boundaries. Journal of Child Language, 34, 815-843. [PDF]

Redford, M.A., & Gildersleeve-Neumann, C.E. (2007). Children’s clear speech suggests word-level targets: preliminary evidence. In Trouvain, J., Barry, W.J. (eds.), Proceedings from the 16th International Congress of Phonetic Sciences, (ICPhS-07 Saarbrücken, Germany), pp. 365-368.

Redford, M.A., & Miikkulainen, R. (2007). Rate effects on structure in a source-filter model of phonological development. Language, 83, 737-769. [PDF]

2005

Redford, M.A., & Randall, P. (2005). The role of juncture cues and phonological knowledge in English syllabification judgments. Journal of Phonetics, 33, 27-46. [PDF]

2004

Redford, M.A. (2004). Origin of consonant duration patterns. In Agwuele, A. Warren, W., Park, S-H. (eds.) Proceedings from the 8th Annual Texas Linguistics Society Conference: Coarticulation in Speech Production and Perception, pp. 54-61. Cascadilla Press. [PDF]

Redford, M.A., Davis, B.L., & Miikkulainen, R. (2004). Phonetic variability and prosodic structure in motherese. Infant Behavior and Development, 27, 477-498. [PDF]

2003

Redford, M.A. (2003). Cognitive template for a phonetic correlate of syllable structure. In Solé, M.J., Recasens, D., Romero, J. (eds.), Proceedings from the 15th International Congress of Phonetic Sciences, (ICPhS-03 Barcelona, Spain), pp. 2261-2264. [PDF]

2001 & earlier

Redford, M.A., Chen, C.C., & Miikkulainen, R. (2001). Constrained emergence of universals and variation in syllable systems. Language and Speech, 44, 27-56. [PDF]

Redford, M. A. (1999). An articulatory basis for the syllable. (Doctoral dissertation, University of Texas at Austin). [PDF]

Redford, M.A. (1999). The mandibular cycle and reversed-sonority onset clusters in Russian. In Ohala, J.J., Hasegawa, Y., Ohala, M., Granvill, D., Bailey, A.C. (eds.), Proceedings from the 14th International Congress of Phonetic Sciences, (ICPhS-99 San Francisco, USA), pp. 1893-1896. American Institute of Physics. [PDF]

Redford, M.A., & Diehl, R.L. (1999). The relative perceptual distinctiveness of initial and final consonants in CVC syllables. Journal of the Acoustical Society of America, 106, 1555-1565. [PDF]

Cohen, L.B., Amsel, G., Redford, M.A., & Casasola, M. (1998). The development of infant causal perception. In Slater, A. (ed.), Perceptual Development: Visual, Auditory, and Speech Perception in Infancy (pp. 167-209). London: Taylor & Francis. [PDF]

Redford, M.A., MacNeilage, P.F., & Davis, B.L. (1997). Production constraints on utterance-final consonant characteristics in babbling. Phonetica, 54, 172-186. [PDF]