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Parentese in infancy predicts 5-year language complexity and conversational turns

Published online by Cambridge University Press:  07 February 2023

Naja FERJAN RAMÍREZ ,
Yael WEISS ,
Kaveri K. SHETH  and
Patricia K. KUHL
Naja FERJAN RAMÍREZ*
Affiliation:
Department of Linguistics, University of Washington, Seattle, WA, USA Institute for Learning & Brain Sciences, University of Washington, Seattle, WA, USA
Yael WEISS
Affiliation:
Institute for Learning & Brain Sciences, University of Washington, Seattle, WA, USA
Kaveri K. SHETH
Affiliation:
Department of Linguistics, University of Washington, Seattle, WA, USA
Patricia K. KUHL
Affiliation:
Institute for Learning & Brain Sciences, University of Washington, Seattle, WA, USA Department of Speech and Hearing Sciences, University of Washington, Seattle, WA, USA
*
Corresponding author. Naja Ferjan Ramírez, Email: naja@uw.edu
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Abstract

Parental input is considered a key predictor of language achievement during the first years of life, yet relatively few studies have assessed its effects on longer-term outcomes. We assess the effects of parental quantity of speech, use of parentese (the acoustically exaggerated, clear, and higher-pitched speech), and turn-taking in infancy, on child language at 5 years. Using a longitudinal dataset of daylong LENA recordings collected with the same group of English-speaking infants (N=44) at 6, 10, 14, 18, 24 months and then again at 5 years, we demonstrate that parents’ consistent (defined as stable and high) use of parentese in infancy was a potent predictor of lexical diversity, mean length of utterance, and frequency of conversational turn-taking between children and adults at Kindergarten entry. Together, these findings highlight the potential importance of a high-quality language learning environment in infancy for success at the start of formal schooling.

Keywords

language inputparenteseconversational turnsLENAlanguage development predictors

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Type
Article
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Journal of Child Language , Volume 51 , Issue 2 , March 2024 , pp. 359 - 384
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© The Author(s), 2023. Published by Cambridge University Press

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References

Aslin, R. N., Woodward, J. Z., LaMendola, N. P., & Bever, T. G. (1996). Models of word segmentation in fluent maternal speech to infants. In Morgan, J. L. & Demuth, K. (Eds.), Signal to syntax: Bootstrapping from speech to grammar in early acquisition (pp. 117–134). Mahwah, NJ: Erlbaum.Google Scholar
Avineri, N., Johnson, E., Brice‐Heath, S., McCarty, T., Ochs, E., Kremer‐Sadlik, T., Blum, S., Zentella, A. C., Rosa, J., Flores, N., Alim, H. S., & Paris, D. (2015). Invited forum: Bridging the “language gap”. Journal of linguistic anthropology, 25(1), 66–86.CrossRefGoogle Scholar
Bird, S., Loper, E., & Klein, E. (2009). Natural Language Processing with Python. O’Reilly Media Inc.Google Scholar
Bornstein, M. H., Tamis-LeMonda, C. S., & Haynes, O. M. (1999). First words in the second year: Continuity, stability, and models of concurrent and predictive correspondence in vocabulary and verbal responsiveness across age and context. Infant Behavior & Development, 22(1), 65–85. https://doi.org/10.1016/S0163-6383(99)80006-XCrossRefGoogle Scholar
Braarud, H. C., & Stormark, K. M. (2008). Prosodic modification and vocal adjustments in mothers’ speech during face-to-face interaction with their two to four-month-old infants: A double video study. Social Development, 17, 1074–1084. https://doi.org/10.1111/j.1467-9507.2007.00455CrossRefGoogle Scholar
Brent, M. R., & Siskind, J. M. (2001). The role of exposure to isolated words in early vocabulary development. Cognition, 81(2), B33–B44.CrossRefGoogle ScholarPubMed
Bruner, J. (1981). The social context of language acquisition. Language & Communication, 1, 155–178. https://doi.org/10.1016/0271-5309(81)90010-0CrossRefGoogle Scholar
Burnham, D., Kitamura, C., & Vollmer-Conna, U. (2002). What’s new pussycat? On talking to babies and animals. Science, 296, 1435.CrossRefGoogle ScholarPubMed
Byers-Heinlein, K., Tsui, A. S. M., Bergmann, C., Black, A. K., Brown, A., Carbajal, M. J., Durrant, S., Fennell, C. T., Fiévet, A. C., Frank, M. C., Gampe, A., Gervain, J., Gonzalez-Gomez, N., Hamlin, J. K., Havron, N., Hernik, M., Kerr, S., Killam, H., Klassen, K., Kosie, J. E., Kovács, Á. M., Lew-Williams, C., Liu, L., Mani, N., Marino, C., Mastroberardino, M., Mateu, V., Noble, C., Orena, A. J., Polka, L., Potter, C. E., Schreiner, M., Singh, L., Soderstrom, M., Sundara, M., Waddell, C., Werker, J. F., & Wermelinger, S. (2021). A multi-lab study of bilingual infants: Exploring the preference for infant-directed speech. Advances in Methods and Practices in Psychological Science, 4(1), https://doi.org/10.1177/2515245920974622CrossRefGoogle ScholarPubMed
Casillas, M., Brown, P., & Levinson, S. C. (2020). Early language experience in a Tseltal Mayan village. Child Development, 91(5), 1819–1835.CrossRefGoogle Scholar
Casillas, M., Brown, P., & Levinson, S. C. (2021). Early language experience in a Papuan community. Journal of Child Language, 48(4), 792–814.CrossRefGoogle Scholar
Cole, P. M., Armstrong, L. M., & Pemberton, C. K. (2010). The role of language in the development of emotion regulation. In Calkins, S. D. & Bell, M. A. (Eds.), Child development at the intersection of emotion and cognition. (pp. 59–77). American Psychological Association. https://doi.org/10.1037/12059-004CrossRefGoogle Scholar
Conboy, B. T., Brooks, R., Meltzoff, A. N., & Kuhl, P. K. (2015). Social interaction in infants’ learning of second-language phonetics: An exploration of brain-behavior relations. Developmental Neuropsychology, 40(4), 216–229. https://doi.org/10.1080/87565641.2015.1014487CrossRefGoogle ScholarPubMed
Cooper, R. P., & Aslin, R. N. (1990). Preference for infant-directed speech in the first month after birth. Child Development, 61(5), 1584–1595. https://doi.org/10.2307/1130766CrossRefGoogle ScholarPubMed
Crain-Thoreson, C., Dahlin, M. P., & Powell, T. A. (2001). Parent-child interaction in three conversational contexts: variations in style and strategy. New directions for child and adolescent development, (92), 23–98. https://doi.org/10.1002/cd.13CrossRefGoogle Scholar
Cristia, A., Bulgarelli, F., & Bergelson, E. (2020). Accuracy of the Language Environment Analysis system segmentation and metrics: A systematic review. Journal of Speech, Language, and Hearing Research, 63(4), 1093– 1105. https://doi.org/10.1044/2020_JSLHR-19-00017CrossRefGoogle ScholarPubMed
Dapretto, M., & Bjork, E. L. (2000). The development of word retrieval abilities in the second year and its relation to early vocabulary growth. Child Development, 71(3), 635–648. https://doi.org/10.1111/1467-8624.00172CrossRefGoogle ScholarPubMed
Durham, R. E., Farkas, G., Hammer, C. S., Tomblin, J. B., & Catts, H. W. (2007). Kindergarten oral language skill: A key variable in the intergenerational transmission of socioeconomic status. Research in Social Stratification and Mobility, 25, 294–305. https://doi.org/10.1016/j.rssm.2007.03.001CrossRefGoogle Scholar
Ferguson, C. A. (1964). Baby Talk in Six Languages. American Anthropologist, 66, 103–114.CrossRefGoogle Scholar
Ferjan Ramírez, N., Hippe, D. S., Correa, L., Andert, J., & Baralt, M. (2022). Habla conmigo, daddy! Fathers’ language input in North American bilingual Latinx families. Infancy, 00, 1–23. https://doi.org/10.1111/infa.12450Google ScholarPubMed
Ferjan Ramírez, N., Hippe, D. S., & Kuhl, P. K. (2021). Comparing automatic and manual measures of parent-infant conversational turns: A word of caution. Child Development, 92(2), 672–681. https://doi.org/10.1111/cdev.13495CrossRefGoogle Scholar
Ferjan Ramírez, N., Lytle, S., Fish, M., & Kuhl, P. K. (2018). Parent coaching at 6 and 10 months improves language outcomes at 14 months: A randomized controlled trial. Developmental Science, 22(3). https://doi.org/10.1111/desc.12762Google ScholarPubMed
Ferjan Ramírez, N., Lytle, S., & Kuhl, P. K. (2020). Parent coaching increases conversational turns and advances infant language development. Proceedings of the National Academy of Sciences of the United States of America, 117(7), 3484–3491. https://doi.org/10.1073/pnas.1921653117CrossRefGoogle ScholarPubMed
Fernald, A. (1985). Four-month-old infants prefer to listen to motherese. Infant Behavior and Development, 8, 181–195. https://doi.org/10.1016/S0163-6383(85)80005-9CrossRefGoogle Scholar
Fernald, A., & Kuhl, P. K. (1987). Acoustic determinants of infant preference for motherese speech. Infant Behavior & Development, 10(3), 279–293. https://doi.org/10.1016/0163-6383(87)90017-8CrossRefGoogle Scholar
Fernald, A., & Mazzie, C. (1991). Prosody and focus in speech to infants and adults. Developmental Psychology, 27(2), 209–221.CrossRefGoogle Scholar
Fernald, A., & Simon, T. (1984). Expanded intonation contours in mothers’ speech to newborns. Developmental Psychology, 20(1), 104–113. https://doi.org/10.1037/0012-1649.20.1.104CrossRefGoogle Scholar
Fernald, A., Taeschner, T., Dunn, J., Papousek, M., de Boysson-Bardies, B., & Fukui, I. (1989). A cross-language study of prosodic modifications in mothers’ and fathers’ speech to preverbal infants. Journal of Child Language, 16, 477–501. https://doi.org/10.1017/S0305000900010679CrossRefGoogle ScholarPubMed
Fromkin, V., Rodman, R., & Hyams, N. (2013). An Introduction to Language. 10th ed. Boston, MA: Cengage LearningGoogle Scholar
Ganger, J., & Brent, M. R. (2004). Reexamining the vocabulary spurt. Developmental Psychology, 40(4), 621–632. https://doi.org/10.1037/0012-1649.40.4.621CrossRefGoogle ScholarPubMed
Garnica, O. (1977). On some prosodic and paralinguistic features of speech to young children. In Snow, C. E., & Ferguson, C. A. (Eds.), Talking to children: Language input and acquisition, (pp. 271–285). Cambridge University Press.Google Scholar
Gergely, A., Faragó, T., Galambos, Á., & Topál, J. (2017). Differential effects of speech situations on mothers’ and fathers’ infant-directed and dog-directed speech: An acoustic analysis. Scientific Reports, 7, 13739. https://doi.org/10.1038/s41598-017-13883-2CrossRefGoogle ScholarPubMed
Gilkerson, J., & Richards, J. A. (2009). The power of talk: Impact of adult talk, conversational turns, and TV during the critical 0-4 years of child development. In The power of talk (2nd ed.). LENA Foundation.Google Scholar
Gilkerson, J., Richards, J. A., Warren, S. F., Montgomery, J. K., Greenwood, C. R., Oller, K. D., Hansen, J., & Paul, T. D. (2017). Mapping the Early Language Environment Using All-Day Recordings and Automated Analysis. American journal of speech-language pathology, 26(2), 248–265. https://doi.org/10.1044/2016_AJSLP-15-0169CrossRefGoogle ScholarPubMed
Gilkerson, J., Richards, J. A., Warren, S. F., Oller, D. K., Russo, R., & Vohr, B. (2018). Language experience in the second year of life and language outcomes in late childhood. Pediatrics, 142(4). https://doi.org/10.1542/peds.2017-4276CrossRefGoogle ScholarPubMed
Goldin‐Meadow, S. (2009). How gesture promotes learning throughout childhood. Child development perspectives, 3(2), 106–111. https://doi.org/10.1111/j.1750-8606.2009.00088.xCrossRefGoogle ScholarPubMed
Goldstein, M. H., & Schwade, J. A. (2008). Social feedback to infants’ babbling facilitates rapid phonological learning. Psychological Science, 19(5), 515–523. https://doi.org/10.1111/j.1467-9280.2008.02117.xCrossRefGoogle ScholarPubMed
Golinkoff, R. M., Hoff, E., Rowe, M. L., & Tamis-LeMonda, C. S., & Hirsh-Pasek, K. (2019). Language matters: Denying the existence of the 30-million-word gap has serious consequences. Child Development, 90(3), 985– 992. https://doi.org/10.1111/cdev.13128CrossRefGoogle ScholarPubMed
Greenwood, C. R., Thiemann-Bourque, K., Walker, D., Buzhardt, J., & Gilkerson, J. (2011). Assessing children’s home language environments using automatic speech recognition technology. Communication Disorders Quarterly, 32, 83–92. https://doi.org/10.1177/1525740110367826CrossRefGoogle Scholar
Grieser, D. L., & Kuhl, P. K. (1988). Maternal speech to infants in a tonal language: Support for universal prosodic features in motherese. Developmental Psychology, 24(1), 14–20. https://doi.org/10.1037/0012-1649.24.1.14CrossRefGoogle Scholar
Hart, B., & Risley, T. (1995). Meaningful differences in the everyday experience of young American children. Baltimore, MD: Brookes.Google Scholar
Hirsh-Pasek, K., Adamson, L. B., Bakeman, R., Owen, M. T., Golinkoff, R. M., Pace, A., Yust, , & Suma, K. (2015). The contribution of early communication quality to low- income children’s language success. Psychological Science, 26, 7, 1071–1083. https://doi.org/10.1177/0956797615581493CrossRefGoogle ScholarPubMed
Hirsh-Pasek, K., & Treiman, R. (1982). Doggerel: Motherese in a new context. Journal of Child Language, 9, 229–237.CrossRefGoogle Scholar
Hoff-Ginsberg, E. (1991). Mother-child conversation in different social classes and communicative settings. Child development, 62(4), 782–796. https://doi.org/10.1111/j.1467-8624.1991.tb01569.xCrossRefGoogle ScholarPubMed
Huber, E., Corrigan, N., Yarnykh, V., Ferjan Ramírez, N., & Kuhl, P. K. K. (2023). Language experience during infancy predicts white matter myelination at age two years. Journal of Neuroscience, in press.CrossRefGoogle Scholar
Jacobson, J. L., Boersma, D. C., Fields, R. B., Olson, K. L., & David, C. (1983). Paralinguistic features of adult speech to infants and small children. Child Development, 54(2), 436–442. https://doi.org/10.2307/1129704CrossRefGoogle Scholar
Kemler Nelson, D. G., Hirsh-Pasek, K., Jusczyk, P. W., & Cassidy, K. W. (1989). How the prosodic cues in motherese might assist language learning. Journal of Child Language, 16, 55–68.CrossRefGoogle ScholarPubMed
Kuhl, P. K. (2004). Early language acquisition: Cracking the speech code. Nature Reviews Neuroscience, 5, 831–843.CrossRefGoogle ScholarPubMed
Kuhl, P. K. (2007). Is speech learning ‘gated’ by the social brain? Developmental Science, 10, 110–120. https://doi.org/10.1111/j.1467-7687.2007.00572.CrossRefGoogle ScholarPubMed
Kuhl, P. K., Andruski, J. E., Chistovich, I. A., Chistovich, L. A., Kozhevnikova, E. V., Ryskina, V. L., Stolyarova, E. I., Sundberg, U., & Lacerda, F. (1997). Cross-language analysis of phonetic units in language addressed to infants. Science, 277, 684–686. https://doi.org/10.1126/science.277.5326.684CrossRefGoogle ScholarPubMed
Kuhl, P. K., Conboy, B. T., Coffey-Corina, S., Padden, D., Rivera-Gaxiola, M., & Nelson, T. (2008). Phonetic learning as a pathway to language: New data and native language magnet theory expanded (NLM-e). Philosophical Transactions of the Royal Society B, 363, 979–1000.CrossRefGoogle ScholarPubMed
Kuhl, P. K., Ramírez, R. R., Bosseler, A., Lin, J. F., & Imada, T. (2014). Infants’ brain responses to speech suggest analysis by synthesis. Proceedings of the National Academy of Sciences of the United States of America, 111(31), 11238–11245. https://doi.org/10.1073/pnas.1410963111CrossRefGoogle ScholarPubMed
Kuhl, P. K., Tsao, F., & Liu, H. (2003). Foreign-language experience in infancy: Effects of short-term exposure and social interaction on phonetic learning. Proceedings of the National Academy of Sciences of the United States of America, 100 (15), 9096– 9101. https://doi.org/10.1073/pnas.1532872100CrossRefGoogle ScholarPubMed
Landry, S. H., Smith, K. E., & Swank, P. R. (2003). The importance of parenting during early childhood for school-age development. Developmental Neuropsychology, 24(2-3), 559–591. https://doi.org/10.1080/87565641.2003.9651911CrossRefGoogle ScholarPubMed
Lehet, M., Arjmandi, M. K., Houston, D., & Dilley, L. (2020). Circumspection in using automated measures: Talker gender and addressee affect error rates for adult speech detection in the Language ENvironment Analysis (LENA) system. Behavior Research Methods, 53, 113–138. https://doi.org/10.3758/s13428-020-01419-yCrossRefGoogle Scholar
LENA. (2015). [Computer software]. Boulder, COGoogle Scholar
Levinson, S. C. (2016). Turn-taking in human communication—Origins and implications for language processing. Trends in Cognitive Sciences, 20(1), 6–14. https://doi.org/10.1016/j.tics.2015.10.010CrossRefGoogle ScholarPubMed
Ma, W., Golinkoff, R. M., Houston, D., & Hirsh-Pasek, K. (2011). Word learning in infant- and adult-directed speech. Language Learning and Development. The Official Journal of the Society for Language Development, 7(3), 185–201. https://doi.org/10.1080/15475441.2011.579839CrossRefGoogle ScholarPubMed
Mandel, D. R., Jusczyk, P. W., & Kemler Nelson, D. G. (1994). Does sentential prosody help infants to organize and remember speech information? Cognition, 53, 155–180.CrossRefGoogle ScholarPubMed
Mandel, D. R., Kemler Nelson, D. G., & Jusczyk, P. W. (1996). Infants remember the order of words in a spoken sentence. Cognitive Development, 11, 181–196.CrossRefGoogle Scholar
The ManyBabies Consortium. (2020). Quantifying sources of variability in infancy research using the infant-directed-speech preference. Advances in Methods and Practices in Psychological Science, 3(1), 24–52. https://doi.org/10.1177/2515245919900809CrossRefGoogle Scholar
Masek, L. R., Paterson, S. J., Golinkoff, R. M., Bakeman, R., Adamson, L. B., Owen, M. T., Pace, A., & Hirsh-Pasek, K. (2021). Beyond talk: Contributions of quantity and quality of communication to language success across socioeconomic strata. Infancy, 26(1), 123–147. https://doi.org/10.1111/infa.12378CrossRefGoogle ScholarPubMed
McCarthy, D. (1954). Language development in children. In Carmichael, L. (Eds.), Manual of child psychology (pp. 492–630). John Wiley & Sons Inc.Google Scholar
Merz, E. C., Maskus, E. A., Melvin, S. A., He, X., & Noble, K. G. (2020). Socioeconomic disparities in language input are associated with children’s language-related brain structure and reading skills. Child Development, 91(3), 846–860. https://doi.org/10.1111/cdev.13239CrossRefGoogle ScholarPubMed
Michaels, R. (2017). Confidence in courts: A delicate balance. Science, 357(6353):764–764. 10.1126/science.aao3967CrossRefGoogle Scholar
Miller, J., & Ulrich, R. (2019). The quest for an optimal alpha. PLoS ONE, 14(1), Article e0208631. https://doi.org/10.1371/journal.pone.0208631Google ScholarPubMed
Miller, J. F., Andriacchi, K., & Nockerts, A. (2019). Assessing language production using SALT software: A clinician’s guide to language sample analysis (3rd ed.). Madison, WI: SALT Software, LLC.Google Scholar
Mitchell, R. W. (2001). Americans’ talk with dogs: Similarities and differences with talk to infants. Research on Language and Social Interaction, 34(2), 183–210.CrossRefGoogle Scholar
Narayan, C. R., & McDermott, L. C. (2016). Speech rate and pitch characteristics of infant-directed speech: Longitudinal and cross-linguistic observations. Journal of the Acoustical Society of America, 139(3), 1272–1281. https://doi.org/10.1121/1.4944634CrossRefGoogle ScholarPubMed
Nazzi, T., Kemler Nelson, D. G., Jusczyk, P. W., & Jusczyk, A. M. (2000). Six-month-olds’ detection of clauses embedded in continuous speech: Effects of prosodic well-formedness. Infancy, 1, 123–147.CrossRefGoogle ScholarPubMed
Newport, E. L., Gleitman, H., & Gleitman, L. R. (1977). Mother, I’d rather do it myself: some effects and non-effects of maternal speech style. In Snow, C. E. & Ferguson, C. A. (Eds.), Talking to children: language input and acquisition (pp. 109–149). New York: C.U.PGoogle Scholar
Pace, A., Burchinal, P., Alper, R., Hirsh-Pasek, K., & Golinkoff, R. M. (2019). Measuring success: Within and cross-domain predictors of academic and social trajectories in elementary school. Early Childhood Research Quarterly, 46, 112–125. https://doi.org/10.1016/j.ecresq.2018.04.001CrossRefGoogle Scholar
Phillips, J. R. (1973). Syntax and vocabulary of mothers’ speech to young children: Age and sex comparisons. Child Development, 44, 182–185.CrossRefGoogle Scholar
Ramírez-Esparza, N., García-Sierra, A., & Kuhl, P. K. (2014). Look who’s talking: Speech style and social context in Language input to infants are linked to concurrent and future speech development. Developmental Science, 17, 880–891. https://doi.org/10.1111/j.1467-7687.2005.00445CrossRefGoogle ScholarPubMed
Ramírez-Esparza, N., García-Sierra, A., & Kuhl, P. K. (2016). The impact of early social interactions on later language development in Spanish– English bilingual infants. Child Development, 88, 1216–1234. https://doi.org/10.1111/cdev.12648CrossRefGoogle ScholarPubMed
Ramírez-Esparza, N., García-Sierra, A., & Kuhl, P. K. (2017). Look who’s talking now! Parentese speech, social context, and language development across time. Frontiers in Psychology, 8, 1173. https://doi.org/10.3389/fpsyg.2017.01008CrossRefGoogle ScholarPubMed
Reese, E. (1995). Predicting children’s literacy from mother-child conversations. Cognitive Development, 10(3), 381–405. https://doi.org/10.1016/0885-2014(95)90003-9CrossRefGoogle Scholar
Reilly, J. S., & Bellugi, U. (1996). Competition on the face: Affect and language in ASL motherese. Journal of Child Language, 23(1), 219–239. https://doi.org/10.1017/S0305000900010163CrossRefGoogle ScholarPubMed
Rodriguez, E. T., & Tamis‐LeMonda, C. S. (2011). Trajectories of the home learning environment across the first 5 years: Associations with children’s vocabulary and literacy skills at prekindergarten. Child Development, 82(4), 1058–1075. https://doi.org/10.1111/j.1467-8624.2011.01614.xCrossRefGoogle ScholarPubMed
Rollins, P. R. (2003). Caregivers’ contingent comments to 9-month-old infants: Relationships with later language. Applied psycholinguistics, 24(2), 221–234. https://doi.org/10.1017/S0142716403000110CrossRefGoogle Scholar
Romeo, R. R., Leonard, J. A., Grotzinger, H. M., Robinson, S. T., Takada, M. E., Mackey, A. P., Scherer, E., Rowe, M. L., West, M. R., & Gabrieli, J. D. E. (2021). Neuroplasticity associated with changes in conversational turn-taking following a family-based intervention. Developmental Cognitive Neuroscience 49. 1878–9293 https://doi.org/10.1016/j.dcn.2021.100967CrossRefGoogle ScholarPubMed
Romeo, R. R., Leonard, J. A., Robinson, S. T., West, M. R., Mackey, A. P., Rowe, M. L., & Gabrieli, J. D. E. (2018a). Beyond the 30-million-word gap: Children’s conversational exposure is associated with language-related brain function. Psychological Science, 29(5), 700–710. https://doi.org/10.1177/0956797617742725CrossRefGoogle ScholarPubMed
Romeo, R. R., Segaran, J., Leonard, J. A., Robinson, S. T., West, M. R., Mackey, A. P., Yendiki, A., Rowe, M. L., & Gabrieli, J. D. E. (2018b). Language exposure relates to structural neural connectivity in childhood. Journal of Neuroscience, 38(36), 7870–7877. https://doi.org/10.1523/JNEUROSCI.0484-18.2018CrossRefGoogle ScholarPubMed
Rowe, M. L. (2012). A longitudinal investigation of the role of quantity and quality of child-directed speech in vocabulary development. Child Development, 83, 1762– 1774. https://doi.org/10.1111/j.1467-8624.2012.01805CrossRefGoogle ScholarPubMed
Rowe, M. L., & Goldin-Meadow, S. (2009a). Differences in early gesture explain SES disparities in child vocabulary size at school entry. Science (New York, N.Y.), 323(5916), 951–953. https://doi.org/10.1126/science.1167025CrossRefGoogle Scholar
Rowe, M. L., & Goldin-Meadow, S. (2009b). Early gesture selectively predicts later language learning. Developmental science, 12(1), 182–187. https://doi.org/10.1111/j.1467-7687.2008.00764.xCrossRefGoogle ScholarPubMed
Rowe, M. L., Ozçalişkan, S., & Goldin-Meadow, S. (2008). Learning words by hand: Gesture’s role in predicting vocabulary development. First language, 28(2), 182–199. https://doi.org/10.1177/0142723707088310CrossRefGoogle ScholarPubMed
Rowe, M. L., & Snow, C. E. (2020). Analyzing input quality along three dimensions: interactive, linguistic, and conceptual. Journal of Child Language, 47(1), 5–21. https://doi.org/10.1017/S0305000919000655CrossRefGoogle ScholarPubMed
Rowe, M. L., & Weisleder, A. (2020). Language Development in Context. Annual Review of Developmental Psychology, 2(1), 22.CrossRefGoogle Scholar
Salomo, D., & Liszkowski, U. (2013). Sociocultural settings influence the emergence of prelinguistic deictic gestures. Child development, 84(4), 1296–1307.CrossRefGoogle ScholarPubMed
Schroeder, L. D., Sjoquist, D. L., & Stephan, P. E. (2016). Understanding regression analysis: An introductory guide (Vol. 57). Sage Publications.Google Scholar
Serdar, C. C., Cihan, M., Yücel, D., & Serdar, M. A. (2021). Sample size, power and effect size revisited: simplified and practical approaches in pre-clinical, clinical and laboratory studies. Biochemia medica, 31(1), 010502. https://doi.org/10.11613/BM.2021.010502CrossRefGoogle ScholarPubMed
Shapiro, N. T., Hippe, D. S., & Ferjan Ramírez, N. (2021). How Chatty Are Daddies? An Exploratory Study of Infants’ Language Environments. Journal of speech, language, and hearing research: JSLHR, 64(8), 3242–3252. https://doi.org/10.1044/2021_JSLHR-20-00727CrossRefGoogle ScholarPubMed
Shi, R., Morgan, J. L., & Allopena, P. (1998). Phonological and acoustic bases for earliest grammatical category assignment: A cross-linguistic perspective. Journal of Child Language, 25, 169–201.CrossRefGoogle ScholarPubMed
Shi, R., Werker, J. F., & Morgan, J. L. (1999). Newborn infants’ sensitivity to perceptual cues to lexical and grammatical words. Cognition, 72, B11–B21.CrossRefGoogle ScholarPubMed
Shneidman, L. A., Arroyo, M. E., Levine, S. C., & Goldin-Meadow, S. (2013). What counts as effective input for word learning? Journal of Child Language, 40(3), 672–686. https://doi.org/10.1017/S0305000912000141CrossRefGoogle ScholarPubMed
Shneidman, L. A., & Goldin-Meadow, S. (2012). Language input and acquisition in a Mayan village: How important is directed speech? Developmental Science, 15(5), 659–673.CrossRefGoogle Scholar
Singh, L., Morgan, J. L., & Best, C. (2002). Infants’ listening preferences: Baby talk or happy talk? Infancy, 3, 365–394.CrossRefGoogle ScholarPubMed
Singh, L., Nestor, S., Parikh, C., & Yull, A. (2009). Influences of infant-directed speech on early word recognition. Infancy, 14(6), 654– 666. https://doi.org/10.1080/15250000903263973CrossRefGoogle ScholarPubMed
Smith, N. A., & Trainor, L. J. (2008). Infant-directed speech is modulated by infant feedback. Infancy, 13, 410–420. https://doi.org/10.1080/15250000802188719CrossRefGoogle Scholar
Snow, C. E. (1977a). Mothers’ speech research: From input to interaction. In Snow, C. E., & Ferguson, C. A. (Eds.), Talking to children: Language input and acquisition, (pp. 31–49). Cambridge University Press.Google Scholar
Snow, C. E. (1977b). The development of conversation between mothers and babies. Journal of Child Language, 4(1), 1–22. https://doi.org/10.1017/S0305000900000453CrossRefGoogle Scholar
Snow, C. E., van Eeden, R., & Muysken, P. (1981). The interactional origins of foreigner talk: Municipal employees and foreign workers. International Journal of the Sociology of Language, 28, 81–91.Google Scholar
Sperry, D. E., Sperry, L. L., & Miller, P. J. (2018). Reexamining the Verbal Environments of Children from Different Socioeconomic Backgrounds. Child Development, 90(4), 1303–1318CrossRefGoogle ScholarPubMed
Stern, D. N., Spieker, S., Barnett, R. K., & MacKain, K. (1983). The prosody of maternal speech: Infant age and context related changes. Journal of Child Language, 10, 1–15. https://doi.org/10.1017/S0305000900005092CrossRefGoogle ScholarPubMed
Tamis-LeMonda, C. S., Kuchirko, Y., & Song, L. (2014). Why is infant language learning facilitated by parental responsiveness? Current Directions in Psychological Science, 23, 121–126. https://doi.org/10.1177/0963721414522813CrossRefGoogle Scholar
Tamis-LeMonda, C. S., Luo, R., McFadden, K. E., Bandel, E. T., & Vallotton, C. (2019). Early home 5th grade academic skills. Applied Developmental Science, 23(2), 153–169.CrossRefGoogle Scholar
Thiessen, E. D., Hill, E. A., & Saffran, J. R. (2005). Infant-directed speech facilitates word segmentation. Infancy, 7, 53–71. https://doi.org/10.1207/s15327078in0701_5CrossRefGoogle ScholarPubMed
Trautman, C., & Rollins, P. (2006). Child-centered behaviors of caregivers with 12-month-old infants: Associations with passive joint engagement and later language. Applied psycholinguistics, 27(3), 447–463. doi:10.1017/S0142716406060358CrossRefGoogle Scholar
Uther, M., Knoll, M. A., & Burnham, D. (2007). Do you speak E-NG-L-I-SH? A comparison of foreigner- and infant-directed speech. Speech Communication, 49(1), 2–7. https://doi.org/10.1016/j.specom.2006.10.003CrossRefGoogle Scholar
Van Rossum, G., & Drake, F. L. (2009). Python 3 Reference Manual. Scotts Valley, CA: CreateSpace.Google Scholar
Vygotsky, L. S. (1979). Interaction between learning and development. In Gauvain, M., & Cole, M. (Eds.), Readings on the development of children, (pp. 34–40). Scientific American Books.Google Scholar
Wang, Y., Williams, R., Dilley, L., & Houston, D. M. (2020). A meta-analysis of the predictability of LENATM automated measures for child language development. Developmental Review, 57, 100921. https://doi.org/10.1016/j.dr.2020.100921CrossRefGoogle Scholar
Warlaumont, A. S., Richards, J. A., Gilkerson, J., & Oller, K. D. (2014). A social feedback loop for speech development and its reduction in autism. Psychological Science, 25(7), 1314–1324. https://doi.org/10.1177/0956797614531023CrossRefGoogle ScholarPubMed
Weisleder, A., & Fernald, A. (2013). Talking to children matters: Early language experience strengthens processing and builds vocabulary. Psychological Science, 24, 2143–2152. https://doi.org/10.1177/0956797613488145CrossRefGoogle ScholarPubMed
Werker, J. F., Pegg, J. E., & McLeod, P. J. (1994). A cross-language investigation of infant preference for infant-directed communication. Infant Behavior & Development, 17(3), 323–333. https://doi.org/10.1016/0163-6383(94)90012-4CrossRefGoogle Scholar
Xu, D., Richards, J. A., & Gilkerson, J. (2014). Automated analysis of child phonetic production using naturalistic recordings. Journal of speech, language, and hearing research : JSLHR, 57(5), 1638–1650. https://doi.org/10.1044/2014_JSLHR-S-13-0037CrossRefGoogle ScholarPubMed
Yoder, P. J., & Kaiser, A. P. (1989). Alternative explanations for the relationship between maternal verbal interaction style and child language development. Journal of child language, 16 ( 1), 141–160. https://doi.org/10.1017/s0305000900013489CrossRefGoogle ScholarPubMed
Zimmerman, F. J., Gilkerson, J., Richards, J. A., Christakis, D. A., Xu, D., Gray, S., Yapanel, U. (2009). Teaching by listening: The importance of adult-child conversations to language development. Pediatrics, 124(1), 342–349. https://doi.org/10.1542/peds.2008-2267CrossRefGoogle ScholarPubMed