A look at first language acquisition

Theoretical foundations and quantitative approaches

Keywords: linguistic development, language acquisition, linguistic theory, nativism, constructivism, usage-based theory, quantitative methods

This paper reviews some theoretical controversies in first language acquisition research, based on the traditional nativist–constructivist divide. The term ‘innateness’ is discussed, along with what constitutes a counterargument to nativism. Common empirical approaches are introduced, with an emphasis on how advances in quantitative methods have shaped the field: new data collection methods and growing analytical sophistication have allowed researchers to sharpen the questions asked and the framing of answers. Corpus analysis of both the input and child language has given the field a stable empirical base, complemented by experimental approaches. Findings in statistical learning and computational modelling have greatly improved our understanding of the learning process. The acquisition of Estonian morphosyntax is briefly discussed. The ‘quantitative turn’ has en­abled researchers to address acquisition through complex, multidimensional means. Results in language acquisition necessarily draw on interdisciplinary methods investigating learning paths, cognitive mechanisms, social communicative goals, and linguistic typological differences to build a plausible picture of the language learner.

Virve-Anneli Vihman (b. 1973), PhD, University of TartuInstitute of Estonian and ­General Linguistics, Lecturer in Applied Linguistics and Senior Research Fellow,


Aguado-Orea, Javier, Pine, Julian M. 2015. Comparing different models of the development of verb inflection in early child Spanish. – PLoS ONE, kd 10, nr 3.

Akhtar, Nameera 1999. Acquiring basic word order: Evidence for data-driven learning of syntactic structure. – Journal of Child Language, kd 26, nr 2, lk 339–356.

Ambridge, Ben 2010. Children’s judgments of regular and irregular novel past-tense forms: New data on the English past-tense debate. – Developmental Psych­ology, kd 46, nr 6, lk 1497–1504.

Ambridge, Ben, Kidd, Evan, Rowland, Caroline F., Theakston, Anna L. 2015. The ubiquity of frequency effects in first language acquisition. – Journal of Child Language, kd 42, nr 2, lk 239–273.

Ambridge, Ben, Lieven, Elena V. M. 2011. Child Language Acquisition: Con­trasting Theoretical Approaches. Cambridge, UK: Cambridge University Press.

Argus, Reili 2004. Eesti keele käändesüsteemi omandamine: esimestest sõnadest miniparadigmadeni. – Emakeele Seltsi aastaraamat, kd 49 (2003). Tallinn: Emakeele Selts, lk 23−48.

Argus, Reili 2008a. Eesti lastekeelekorpuse morfoloogiliste vigade märgendamisest ja liigitamisest. – Õppijakeele analüüs. Võimalused, probleemid, vajadusedToim Pille Eslon. Tallinn: Tallinna Ülikooli Kirjastus, lk 11−30.

Argus, Reili 2008b. Eesti keele muutemorfoloogia omandamine. Analüütiline ülevaade. (Tallinna Ülikooli humanitaarteaduste dissertatsioonid 19.) Tallinn: Tallinna Ülikooli Kirjastus.

Argus, Reili 2009a. Psühholingvistiline katse eesti keele objekti käändevahelduse omandamise uurimise meetodina. – Emakeele Seltsi aastaraamat, kd 54 (2008). Tallinn: Teaduste Akadeemia Kirjastus, lk 22–43.

Argus, Reili 2009b. Acquisition of Estonian: Some typologically relevant features. – Sprachtypologie und Universalienforschung, kd 62, nr 1–2, lk 91–108.

Argus, Reili 2009c. The early development of case and number in Estonian. – Development of Nominal Inflection in First Language Acquisition: A Cross-­Linguistic Perspective. (Studies on Language Acquisition 30.) Toim Ursula Stephany, Maria D. Voeikova. Berlin: Mouton de Gruyter, lk 111−152.

Arnon, Inbal, Ramscar, Michael 2012. Granularity and the acquisition of grammatical gender: How order-of-acquisition affects what gets learned. – Cognition, kd 122, nr 3, lk 292–305.

Baayen, R. Harald, Milin, Petar, Filipovic Durdevic, Dusica, Hendrix, Peter, Marelli, Marco 2011. An amorphous model for morphological processing in visual comprehension based on naive discriminative learning. – Psychological Review, kd 118, nr 3, lk 438–482.

Backus, Ad 2003. Units in codeswitching: Evidence for multimorphemic elements in the lexicon. – Linguistics, kd 41, nr 1, lk 83–132.

Behrens, Heike (toim) 2008. Corpora in Language Acquisition Research: History, Methods, Perspectives. Amsterdam: John Benjamins.

Berko, Jean 1958. The child’s learning of English morphology. – Word, kd 14, nr 2–3, lk 150–177.

Bickerton, Derek 2007. Language evolution: A brief guide for linguists. – Lingua, kd 117, nr 3, lk 510–526.

Bittner, Dagmar, Dressler, Wolfgang U., Kilani-Schoch, Marianne 2003. Development of Verb Inflection in First Language Acquisition: A Cross-Linguistic Perspective. Berlin: De Gruyter.

Blom, Elma, Unsworth, Sharon (toim) 2010. Experimental Methods in Language Acquisition Research. Amsterdam: John Benjamins.

Broccias, Cristiano 2012. The syntax-lexicon continuum. – The Oxford Handbook of the History of English. Toim Terttu Nevalainen, Elizabeth C. Traugott. Oxford: Oxford University Press.

Bybee, Joan L., Hopper, Paul J. 2001. Frequency and the Emergence of Linguistic Structure. Amsterdam–Philadelphia: John Benjamins.

Cameron-Faulkner, Thea, Lieven, Elena, Theakston, Anna 2007. What part of no do children not understand? A usage-based account of multiword negation. – Journal of Child Language, kd 34, nr 2, lk 251–282.

Chomsky, Noam 1975. Reflections on Language. New York: Pantheon.

Chomsky, Noam 1980. On cognitive structures and their development: A reply to Piaget. – Language and Learning: The Debate Between Jean Piaget and Noam Chomsky. Toim Massimo Piattelli-Palmarini. Cambridge, MA: Harvard University Press.

Clark, Eve V. 2009. First Language Acquisition. Cambridge: Cambridge University Press.

Crain, Stephen, Nakayama, Mineharu 1987. Structure dependence in grammar formation. – Language, kd 63, nr 3, lk 522–543.

Croft, William 2001. Radical Construction Grammar: Syntactic Theory in Typo­logical Perspective. Oxford: Oxford University Press.

Croft, William 2009. Methods for finding language universals in syntax. – Universals of Language Today. (Studies in Natural Language and Linguistic Theory 76.)Toim SergioScalise, Elisabetta Magni, Antonietta Bisetto. Dordrecht: Springer, lk 145–164.

Culbertson, Jennifer, Kirby, Simon 2016. Simplicity and specificity in language: Domain-general biases have domain-specific effects. – Frontiers in Psych­ology, kd 6.

Dąbrowska, Ewa 2008. The later development of an early-emerging system: The curious case of the Polish genitive. – Linguistics, kd 46, nr 3, lk 629–650.

Dąbrowska, Ewa 2015. What exactly is Universal Grammar, and has anyone seen it? – Frontiers in Psychology, kd 6.

Dąbrowska, Ewa, Divjak, Dagmar 2015. Handbook of Cognitive Linguistics. Berlin: De Gruyter.

Dąbrowska, Ewa, Szczerbinski, Marcin 2006. Polish children’s productivity with case marking: The role of regularity, type frequency, and phonological diversity. – Journal of Child Language, kd 33, nr 3, lk 559–597.

Darnell, Michael, Moravcsik, Edith A., Noonan, Michael, Newmeyer, Frederick J., Wheatley, Kathleen 1999. Functionalism and Formalism in Linguistics. Kd 1, General papers. Amsterdam: John Benjamins.

DeRuiter, Laura, Theakston, Anna 2017. First language acquisition. – The Cambridge Handbook of Cognitive Linguistics. Toim Barbara Dancygier. Cambridge: Cambridge University Press.

Deen, Kamil, Hyams, Nina 2006. The morphosyntax of mood in early grammar with special reference to Swahili. – First Language, kd 26, nr 1, lk 67–102.

Dittmar, Miriam, Abbot-Smith, Kirsten, Lieven, Elena, Tomasello, Michael 2008. German children’s comprehension of word order and case marking in causative sentences. – Child Development, kd 79, nr 4, lk 1152–1167.

Dressler, Wolfgang U. 1988. Preferences vs. strict universals in morphology: Word-based rules. – Theoretical Morphology. Toim Michael Hammond, Michael Noonan. San Diego: Academic Press, lk 143–153.

Dressler, Wolfgang U. 1990. The cognitive perspective of „naturalist” linguistic models. – Cognitive Linguistics, kd 1, nr 1, lk 75–98.

Dressler, Wolfgang U. 2005. Morphological typology and first language acquisition: Some mutual challenges. – Morphology and Linguistic Typology: Online Proceedings of the Fourth Mediterranean Morphology Meeting Catania 21–23 September 2003. Toim Geert Booij, Emiliano Guevara, Angeliki Ralli, Salvatore Sgroi, Sergio Scalise. University of Bologna.

Dressler, Wolfgang U. 2012. On the acquisition of inflectional morphology: Introduction. – Morphology, kd 22, nr 1, lk 1–8.

Dressler, Wolfgang U., Karpf, Annemarie 1995. The theoretical relevance of pre- and protomorphology in language acquisition. – Yearbook of Morphology, 1994. Toim Geert Booij, Jaap van Marle. Dordrecht: Springer, lk 99–122.

Ellis, Nick C. 1994. Implicit and explicit processes in language acquisition: An introduction. – Implicit and Explicit Learning of Languages. Toim N. C. Ellis. San Diego: Academic Press, lk 1–32.

Ellis, Nick C. 2017. Cognition, corpora, and computing: Triangulating research in usage-based language learning. – Language Learning, kd 67 (S1), lk 40–65.

Elman, Jeffrey L., Bates, Elizabeth A., Johnson, Mark H. 1996. Rethinking Innateness: A Connectionist Perspective on Development. Cambridge, MA: MIT Press.

Eslon, Pille, Õim, Katre, Kaivapalu, Annekatrin, Argus, Reili, Matsak, Erika 2010. Kuidas uurida esimese ja teise keele omandamist? – Lähivõrdlusi. Lähivertailuja, nr 20, lk 11–48.

Freudenthal, Daniel, Pine, Julian, Gobet, Fernand 2010. Explaining quantitative variation in the rate of Optional Infinitive errors across languages: A comparison of MOSAIC and the Variational Learning Model. – Journal of Child Language, kd 37, nr 3, lk 643–669.

Frost, Ram, Armstrong, Blaire C., Siegelman, Noam, Christiansen, Morten H. 2015. Domain generality versus modality specificity: The paradox of statistical learning. – Trends in Cognitive Sciences, kd 19, nr 3, lk 117–125.

Frost, Rebecca L. A., Monaghan, Padraic 2016. Simultaneous segmentation and generalisation of non-adjacent dependencies from continuous speech. – Cognition, kd 147, lk 70–74.

Frost, Rebecca L. A., Monaghan, Padraic, Christiansen, Morten H. 2016. Using statistics to learn words and grammatical categories: How high frequency words assist language acquisition. – Proceedings of the 38th Annual Meeting of the Cognitive Science Society (CogSci 2016). Toim Anna Papafragou, Daniel Grodner, Daniel Mirman, John Trueswell. Austin, TX: Cognitive Science Society, lk 81–86.

Goldberg, Adele E. 2006. Constructions at Work: The Nature of Generalization in Language. Oxford: Oxford University Press.

Gomez, Rebecca L., Gerken, LouAnn 1999. Artificial grammar learning by 1-year-olds leads to specific and abstract knowledge. – Cognition, kd 70, nr 2, lk 109–135.

Granlund, Sonia, Kolak, Joanna, Vihman, Virve-Anneli, Engelmann, Felix, Lieven, Elena, Pine, Julian, Theakson, Anna, Ambridge, Ben (ilmumas). Language-general and language-specific phenomena in the acquisition of inflectional noun morphology: A cross-linguistic elicited-production study of Polish, Finnish and Estonian.

Gvozdov 1961 = А. Н. Гвоздов. Вопросы изучениф детской речи. Москва: Издательство Академии педагогических наук РСФСР.

Hallap, Merit, Padrik, Marika, Raudik, Signe 2014. Käändevormide kasutamise oskus eakohase arenguga vene-eesti kakskeelsetel ning spetsiifilise kõnearengu puudega ükskeelsetel lastel. – Eesti Rakenduslingvistika Ühingu aasta­raamat, nr 10, lk 73–90.

Hartshorne, Joshua K., Ullman, Michael T. 2006. Why girls say „holded” more than boys. – Developmental Science, kd 9, nr 1, lk 21–32.

Hoekstra, Teun, Hyams, Nina 1998. Aspects of root infinitives. – Lingua, kd 106, nr 1–4, lk 81–112.

Hoff, Erika (toim) 2012. Research Methods in Child Language: A Practical Guide. Chichester: Wiley-Blackwell.

Hurford, James R. 2014. The Origins of Language: A slim guide. Oxford: OUP.

Ibbotson, Paul 2013. The scope of usage-based theory. – Frontiers in Psychology, kd 4.

Kelly, Barbara F., Forshaw, William, Nordlinger, Rachel, Wigglesworth, Gillian 2015. Linguistic diversity in first language acquisition research: Moving beyond the challenges. – First Language, kd 35, nr 4–5, lk 286–304.

Kipling, Rudyard 2001. Džungliraamat. Tlk Valter Rummel, Pille Runtal. Tallinn: Varrak.

Knapp, Karlfried, Antos, Gerd 2007. Introduction to the handbook series. – Handbooks of Applied Linguistics, kd 1–9. Toim K. Knapp, G. Antos. Berlin: De Gruyter, lk v–xv.

Krajewski, Grzegorz, Theakston, Anna L., Lieven, Elena V. M., Tomasello, Michael 2011. How Polish children switch from one case to another when using novel nouns: Challenges for models of inflectional morphology. – Lang­uage and Cognitive Processes, kd 26, nr 4–6, lk 830–861.

Lasnik, Howard, Lidz, Jeffrey L. 2016. The argument from the poverty of the stimulus. – The Oxford Handbook of Universal Grammar. Toim Ian Roberts. Oxford: Oxford University Press, lk 221–248.

Lieven, Elena 2016. Usage-based approaches to language development: Where do we go from here? – Language and Cognition, kd 8, nr 3, lk 346–368.

Lieven, Elena, Behrens, Heike 2012. Dense sampling. – Research Methods in Child Language: A Practical Guide. Toim Erika Hoff. Chichester: Wiley-Black­well, lk 226–239.

Lieven, Elena, Pine, Julian, Baldwin, Gillian 1997. Lexically-based learning and early grammatical development. – Journal of Child Language, kd 24, nr 1, lk 187–219.

Lieven, Elena, Stoll, Sabine 2009. Language development. – The Handbook of Cross-Cultural Developmental Science. Toim Marc Bornstein. New York: Psy­ch­ology Press, lk 143–160.

MacWhinney, Brian 2000. The CHILDES Project: Tools for Analyzing Talk. Mahwah, NJ: Lawrence Erlbaum Associates.

MacWhinney, Brian 2001. Emergentist approaches to language. – Frequency and the Emergence of Linguistic Structure. Toim Joan L. Bybee, Paul J. Hopper. Amsterdam: John Benjamins, lk 449–470.

MacWhinney, Brian 2005. Item-based constructions and the logical problem. – Proceedings of the Workshop on Psychocomputational Models of Human Language Acquisition. Ann Arbor, MI: Association for Computational Linguistics, lk 53–68.

MacWhinney, Brian, O’Grady, William 2015. The Handbook of Language Emergence. Chichester: Wiley-Blackwell.

Mameli, Matteo, Bateson, Patrick 2006. Innateness and the sciences. – Biology and Philosophy, kd 21, nr 2, lk 155–188.

Mameli, Matteo, Bateson, Patrick 2011. An evaluation of the concept of innate­ness. – Philosophical Transactions of the Royal Society B: Biological Sciences, kd 366, lk 436–443.

Markman, Ellen M., Wachtel, Gwyn F. 1988. Children’s use of mutual exclusivity to constrain the meanings of words. – Cognitive Psychology, kd 20, nr 2, lk 121–157.

Maslen, Robert J. C., Theakston, Anna L., Lieven, Elena V. M., Tomasello, Michael 2004. A dense corpus study of past tense and plural overregularization in English. – Journal of Speech, Language, and Hearing Research, kd 47, nr 6, lk 1319–1333.

McCauley, Stewart M., Monaghan, Padraic,  Christiansen, Morten H. 2015. Language emergence in development: A computational perspective. – The Handbook of Language Emergence. Toim Brian MacWhinney, William O’Grady. Hoboken, NJ: Wiley-Blackwell, lk 415–436.

McClelland, Jay L., Patterson, Karalyn 2002. Rules of connections in past-tense inflections: What does the evidence rule out? – TRENDS in Cognitive Sciences, kd 6, nr 11, lk 465–472.

Mintz, Toby H. 2003. Frequent frames as a cue for grammatical categories in child directed speech. – Cognition, kd 90, nr 1, lk 91–117.

Mirković, Jelena, Seidenberg, Mark S., Joanisse, Marc F. 2011. Rules versus Statistics: Insights from a highly inflected language. – Cognitive Science, kd 35, nr 4, lk 638–681.

Monaghan, Padraic 2017. Canalization of language structure from environmental constraints: A computational model of word learning from multiple cues. – Topics in Cognitive Science, kd 9, nr 1, lk 21–34.

Monaghan, Padraic, Rowland, Caroline F. 2017. Combining language corpora with experimental and computational approaches for language acquisition research. – Language Learning, kd 67 (S1), lk 14–39.

Newmeyer, Frederick J. 2000. Language Form and Language Function. Cam­bridge, MA: MIT Press.

Ninio, Anat 2006. Language and the Learning Curve: A New Theory of Syntactic Development. New York, NY: Oxford University Press.

Padrik, Marika, Hallap, Merit, Raudik, Signe 2016. 3–4-aastaste eesti laste kõne grammatiline profiil. – Eesti Haridusteaduste Ajakiri, kd 4, nr 2, lk 30–59.

Perek, Florent, Goldberg, Adele E. 2015. Generalizing beyond the input: The functions of the constructions matter. – Journal of Memory and Language, kd 84, lk 108–127.

Pinker, Steven 1994. The Language Instinct: How the Mind Creates Language. New York–London: Harper Collins, Penguin.

Prasada, Sandeep, Pinker, Steven 1993. Generalisation of regular and irregular morphological patterns. – Language and Cognitive Processes, kd 8, nr 1, lk 1–56.

Ramscar, Michael, Dye, Melody, McCauley, Stewart M. 2013. Error and expectation in language learning: The curious absence of mouses in adult speech. – Language, kd 89, nr 4, lk 760–793.

Reber, Arthur S. 1989. Implicit learning and tacit knowledge. – Journal of Ex­perimental Psychology, kd 118, nr 3, lk 219–235.

Rebuschat, Patrick (toim) 2015. Implicit and Explicit Learning of Languages. Amsterdam–Philadelphia: John Benjamins.

Rowland, Caroline F., Pine, Julian M. 2000. Subject-auxiliary inversion errors and wh-question acquisition: „what children do know”? – Journal of Child Language, kd 27, nr 1, lk 157–181.

Rubino, Rejane B., Pine, Julian M. 1998. Subject–verb agreement in Brazilian Portuguese: What low error rates hide. – Journal of Child Language, kd 25, nr 1, lk 35–59.

Rūķe-Draviņa, Velta 1959. Zur Entstehung der Flexion in der Kindersprache: Ein Beitrag auf der Grundlage des lettischen Sprach Materials. – International Journal of Slavic Linguistics and Poetics, kd 1–2, lk 201–222.

Rumelhart, David E., McClelland, James L. 1986. Parallel Distributed Processing: Explorations in the Microstructure of Cognition. Cambridge, MA: MIT Press.

Saffran, Jenny R., Aslin, Richard N., Newport, Elissa L. 1996a. Statistical learning by 8-month-old infants. – Science, kd 274, lk 1926–1928.

Saffran, Jenny R., Newport, Elissa L., Aslin, Richard N. 1996b. Word segmentation: The role of distributional cues. – Journal of Memory and Language, kd 35, nr 4, lk 606–621.

Sapir, Edward 1921. Language: An Introduction to the Study of Speech. New York: Harcourt, Brace and co.

Slobin, Dan (toim) 1985. Cross Linguistic Study of Language Acquisition. Hillsdale, NJ: Lawrence Erlbaum Associates.

Smoczynska, Magdalena 1985. The acquisition of Polish. – The Crosslinguistic Study of Language Acquisition: The Data. Toim Dan Slobin. Hillsdale, NJ: Lawrence Erlbaum Associates, lk 595–686.

Theakston, Anna L., Lieven, Elena V. M., Pine, Julian M., Rowland, Caroline F. 2002. Going, going, gone: The acquisition of the verb „go”. – Journal of Child Language, kd 29, nr 4, lk 783–811.

Thelen, Esther, Smith, Linda B. 1994. A Dynamic Systems Approach to the Development of Cognition and Action. Cambridge, MA: MIT Press.

Thymé, Ann, Ackerman, Farrell, Elman, Jeffrey 1994. Finnish nominal inflection: Paradigmatic patterns and token analogy. – The Reality of Linguistic Rules. Toim S. D. Lima, R. L. Corrigan, G. K. Iverson. Amsterdam–Phila­delphia: John Benjamins, lk 445–466.

Tomasello, Michael 1992. First Verbs: A Case Study of Early Grammatical Development. Cambridge: Cambridge University Press.

Tomasello, Michael 2000. The social-pragmatic theory of word learning. – Pragmatics, kd 10, nr 4, lk 401–413.

Tomasello, Michael 2003. Constructing a Language: A Usage-Based Theory of Language Acquisition. Cambridge, MA: Harvard University Press.

Tomasello, Michael 2008. Origins of Human Communication: The Jean Nicod Lectures. Cambridge, MA: MIT Press.

Tomasello, Michael, Stahl, Daniel 2004. Sampling children’s spontaneous speech: How much is enough? – Journal of Child Language, kd 31, nr 1, lk 101–121.

Tragel, Ilona 2001. Kognitiivne lingvistika mujal ja meil. – Teoreetiline keeleteadus Eestis. Toim Renate Pajusalu, I. Tragel, Tiit Hennoste, Haldur Õim. Tartu: Tartu Ülikooli Kirjastus, lk 272–286.

Vaik, Kristiina 2014. Eesti keele muutemorfoloogia omandamisest WUG katse põhjal. Bakalaureusetöö. Tartu Ülikool.

Vaik, Kristiina, Vihman, Virve-Anneli 2017. Eesti lastekeele korpuse morfoloogilise märgendamise kitsaskohtadest. – Eesti Rakenduslingvistika Ühingu aastaraamat, nr 13, lk 205–221.

Vihman, Marilyn M. 1982. The acquisition of morphology by a bilingual child: A whole-word approach. – Applied Psycholinguistics, kd 3, nr 2, lk 141–160.

Vihman, Marilyn M. 1999. The transition to grammar in a bilingual child. – International Journal of Bilingualism, kd 3, nr 2–3, lk 267–299.

Vihman, Marilyn M. 2017. Learning words and learning sounds: Advances in language development. – British Journal of Psychology, kd 108, nr 1, lk 1–27.

Vihman, Marilyn M., Keren-Portnoy, Tamar 2013. Introduction: The emergence of phonology: whole-word approaches, cross-linguistic evidence. – The Emergence of Phonology: Whole-word Approaches and Cross-linguistic Evidence. Cambridge: Cambridge University Press, lk 1–14.

Vihman, Marilyn M., Vihman, Virve-Anneli 2011. From first words to segments. – Experience, Variation and Generalization: Learning a First Language. Toim Inbal Arnon, Eve V. Clark. Amsterdam: John Benjamins, lk 109–133.

Vihman, Marilyn M., Vija, Maigi 2006. The acquisition of verbal inflection in Estonian: Two case studies. – The Acquisition of Verbs and Their Grammar: The Effect of Particular Languages. Toim Natalia Gagarina, Insa Gülzow. Berlin: Springer, lk 263–295.

Vihman, Virve-Anneli, Engelmann, Felix, Theakston, Anna, Lieven, Elena 2017. Multiple patterns: 3- to 5-year-olds’ ability to decline novel nouns in Estonian. – Ettekanne. International Cognitive Linguistics Conference, Tartu.

Vija, Maigi 2007. Pronoomenid lapsekeeles: mõnda MINA ja SINA omandamisest eesti laste näitel. – Eesti Rakenduslingvistika Ühingu aastaraamat, nr 3, lk 373−385.

Vija, Maigi, Torn-Leesik, Reeli, Pajusalu, Renate 2009. Tegumood eesti lapse­keeles. – Eesti Rakenduslingvistika Ühingu aastaraamat, nr 5, lk 329−344.

Wexler, Ken 1998. Very early parameter setting and the unique checking constraint: A new explanation of the optional infinitive stage. – Lingua, kd 106, nr 1–4, lk 23–79.

Wittgenstein, Ludwig 2005 [1953]. Filosoofilised uurimusedTlk Andres Luure. (Avatud Eesti Raamat.) Tartu: Ilmamaa.

Wonnacott, Elizabeth, Boyd, Jeremy K., Thomson, Jennifer, Goldberg, Adele E. 2012. Input effects on the acquisition of a novel phrasal construction in 5 year olds. – Journal of Memory and Language, kd 66, nr 3, lk 458–478.

Woodward, Amanda L., Markman, Ellen M. 1998. Early Word Learning. Hand­book of Child Psychology. Kd 2. Cognition, Perception, and Language. Toim W. Damon. Hoboken, NJ: John Wiley & Sons Inc, lk 371–420.

Õim, Haldur 2006. Hargnemisi teoreetilises keeleteaduses. – Teoreetiline keeleteadus Eestis II. Toim Ilona Tragel, H. Õim. Tartu: Tartu Ülikooli Kirjastus, lk 9–20.

Xanthos, Aris, Laaha, Sabine, Gillis, Steven, Stephany, Ursula, Aksu-Koç, Ayhan, Christofidou, Anastasia, Gagarina, Natalia, Hrzica, Gordana, Ketrez, F. Nihan, Kilani-Schoch, Marianne, Korecky-Kröll, Katharina, Kovacevic, Melita, Laalo, Klaus, Palmovic, Marijan, Pfeiler, Barbara, Voeikova, Maria D., Dressler, Wolfgang U. 2011. On the role of morphological richness in the early development of noun and verb inflection. – First Language, kd 31, nr 4, lk 461–479.