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Article published In:
International Journal of Chinese Linguistics
Vol. 7:2 (2020) ► pp.223–269

Acquisition of null objects in Mandarin Chinese by heritage speakers

Syntax-pragmatics interface knowledge without inflectional morphology

| National Chiao Tung University
| National Tsing Hua University
| University of Michigan

The acquisition of the grammatical knowledge related to inflectional morphology and syntax-pragmatics interface have both been shown to be challenging for heritage speakers (e.g., Montrul et al. 2008; Polinsky 2006, 2008; Sorace et al. 2009; Montrul 2009; Benmamoun et al. 2013a; Laleko & Polinsky 2016). In these previous work on heritage language acquisition, the acquisition of inflectional morphology (e.g. either agreement morphology or topic marking) is also a relevant acquisition task associated with the syntax-discourse phenomena under investigation. In this paper we focus on the acquisition of discourse-conditioned structures by heritage speakers when inflectional morphology is not part of the learning task. Specifically, we report results of a picture-verification experiment focusing on English-dominant heritage Chinese speakers’ grammatical knowledge of null objects. As a topic-prominent language lacking verbal tense/agreement morphology, the licensing and identification of null arguments in Chinese has nothing to do with agreement morphology. In addition, unlike other topic-prominent pro-drop languages, Chinese has no inflectional morphology associated with grammatical subjects/objects and topic phrases. Without the interference of co-occurring inflectional morphology, we found that there is no significant difference between heritage Chinese speakers and the monolingual baseline in their acceptance of null objects in contextually appropriate contexts. The results of our study cast doubt on the thesis that heritage speakers are unable to acquire discourse-related knowledge (cf. Sorace & Serratrice 2009; Laleko 2010; Laleko & Polinsky 2016) and support Yuan’s (2010) claim that interface categories should not be considered holistically.

Keywords: null objects, syntax-pragmatics interface, Mandarin Chinese, heritage speakers
Article outline
  • 1.Introduction: Heritage bilingualism and vulnerable domains
  • 2.Chinese null arguments
  • 3.Methods
    • 3.1Subjects
    • 3.2Picture-verification task (PVT)
      • 3.2.1Procedure
      • 3.2.2Materials
      • 3.2.3Results
      • 3.2.4Discussion
  • 4.General discussion
  • 5.Conclusion
  • Acknowledgements
  • Notes
  • Abbreviations
  • References
Published online: 10 December 2020
DOI logo
https://doi.org/10.1075/ijchl.19016.cho
References

References

Albirini, A. E., Benmamoun, E., & Saadah, E.
(2011) Grammatical features of Egyptian and Palestinian heritage speakers’ oral production. Studies in Second Language Acquisition, 331, 273–303. DOI logoGoogle Scholar
Argyri, E. & Sorace, A.
(2007) Crosslinguistic influence and language dominance in older bilingual children. Bilingualism: Language and Cognition, 101, 79–99. DOI logoGoogle Scholar
Baayen, R. H.
(2008) Analyzing linguistic data: A practical introduction to statistics using R. Cambridge University Press. DOI logoGoogle Scholar
(2010) A real experiment is a factorial experiment? The Mental Lexicon, 51, 149–157. DOI logoGoogle Scholar
Barr Dale, J., Levy, R., Scheepers, C., & Tily, H. J.
(2013) Random effects structure for confirmatory hypothesis testing: Keep it maximal. Journal of Memory and Language, 681, 255–278. DOI logoGoogle Scholar
Bates, D., Bolker, B. M., Maechler, M., & Walker, S.
(2018) lme4: Linear mixed-effect models using S4 classes.Google Scholar
Belletti, A., Bennatti, E., & Sorace, A.
(2007) Theoretical and developmental issues in the syntax of subjects: evidence from near-native Italian. Natural Language and Linguistic Theory, 251, 657–689. DOI logoGoogle Scholar
Benmamoun, E., Montrul, S., & Polinsky, M.
(2010) Prolegomena to heritage linguistics [White paper]. University of Illinois at Urbana-Champaign and Harvard University. Retrieved from [URL]
(2013a) Heritage languages and their speakers: Opportunities and challenges for linguistics. Theoretical Linguistics, 391, 129–181. DOI logoGoogle Scholar
(2013b) Defining an “ideal” heritage speaker: Theoretical and methodological challenges. Reply to peer commentaries. Theoretical Linguistics, 391, 259–294. DOI logoGoogle Scholar
Berman, R.
(2004) Between emergence and mastery: the long developmental route of language acquisition. In R. Berman (Ed.). Language Development across Childhood and Adolescence (pp. 9–34). Amsterdam: John Benjamins. DOI logoGoogle Scholar
Bini, M.
(1993) La adquisición del italiano: más allá de las propiedades sintácticas delparámetro pro-drop. In J. M. Liceras (Ed.). La lingüística yelanálisis de los sistemas no nativos (pp. 126–139). Ottawa: Dovehouse.Google Scholar
Bley-Vroman, R.
(1990) The logical problem of foreign language learning. Linguistic Analysis, 201, 3–49.Google Scholar
Bonfieni, M., Branigan, H. P., Pickering, M. J., & Sorace, A.
(2019) Language experience modulates bilingual language control: The effect of proficiency, age of acquisition, and exposure on language switching. Acta Psychologica, 1931, 160–170. DOI logoGoogle Scholar
Brehmer, B. & Czachor, A.
(2010) A case study of two groups of Polish-German bilinguals. Paper presented at the Workshop on Incomplete Acquisition and Language Attrition. Hamburg University, July 2010.
Cheng, H.-T. J.
(2011) Argument ellipsis in Mandarin Chinese. In Proceedings of the 23rd North America Conference on Chinese Linguistics (NACCL-23).Google Scholar
(2012) On the (non)-elidability of Phases. In Proceedings of GLOW in Asia Workshop for Young Scholars.Google Scholar
(2013) Argument Ellipsis, Classifier Phrases, and the DP Parameter, PhD Dissertation, University of Connecticut.Google Scholar
Choi, H.-W.
(2003) Paradigm leveling in American Korean. Language Research, 391, 183–204.Google Scholar
Chomsky, N.
(1965) Aspects of the Theory of Syntax. Cambridge, MA: MIT Press.Google Scholar
(1981) Lectures on Government and Binding. Foris, Dordrecht.Google Scholar
(1986) Knowledge of Language: Its Nature, Origins, and Use. New York, NY: Praeger.Google Scholar
Chung, E. S.
(2009) Challenging a single-factor analysis of case ellipsis in Korean. Qualifying paper, University of Illinois at Urbana-Champaign, Department of Linguistics.Google Scholar
Cohen, J.
(1983) The cost of dichotomization. Applied Psychological Measurement, 71, 249–253. DOI logoGoogle Scholar
de Groot, C.
(2005) The grammars of Hungarian outside Hungary from a linguistic-typological perspective. In Fenyvesi, A. (Ed.). Hungarian language contact outside Hungary (pp. 351–370). Amsterdam: John Benjamins. DOI logoGoogle Scholar
de Prada Pérez, A.
(2009) Subject expression in Minorcan Spanish: Consequences of contact with Catalan. PhD Dissertation, Pennsylvania State University.Google Scholar
de Swart, P.
(2013) A (single) case for heritage speakers? Theoretical Linguistics, 391, 251–258. DOI logoGoogle Scholar
Dubisz, S.
(1997) Język polski poza granicami kraju – proba charakteristiki kontrastowej. In Dubisz, S. (Ed.), Język polski poza granicami kraju (pp. 324–376). Opole: Uniwersytet Opolski.Google Scholar
(2001) Język polski poza granicami kraju. In Gajda, S. (Ed.), Język polski (pp. 492–514). Opole: Uniwersytet Opolski.Google Scholar
Epstein, S. D., Flynn, S., & Martohardjono, G.
(1996) Second language acquisition: Theoretical and experimental issues in contemporary research. Behavioral and Brain Sciences, 191, 677–714. DOI logoGoogle Scholar
Flores, C. M. M.
(2015) Understanding heritage language acquisition. Some contributions from the research on heritage speakers of European Portuguese. Lingua, 1641, 251–265. DOI logoGoogle Scholar
Grüter, T.
(2007) Investigating object drop in child French and English: A truth value judgment task. In Belikova, A., Meroni, L. & Umeda, M. (Eds.). Proceedings of the 2nd Conference on Generative Approaches to Language Acquisition North America (GALANA) (pp. 102–113). Somerville, MA: Cascadilla Proceedings Project.Google Scholar
Guijarro-Fuentes, P. & Schmitz, K.
(2015) The nature and nurture of heritage language acquisition. Lingua, 1641, 239–250. DOI logoGoogle Scholar
Herschensohn, J.
(2007) Language development and age. Cambridge: Cambridge University Press. DOI logoGoogle Scholar
Huang, C.-T. J.
(1984) On the distribution and reference of empty pronouns. Linguistic Inquiry, 151, 531–574.Google Scholar
(1989)  Pro-drop in Chinese: A generalized control approach. In O. Jaeggli & K. Safir (Eds.). The Null Subject Parameter (pp. 185–214). Dordrecht: D. Reidel. DOI logoGoogle Scholar
(1991) Remarks on the status of the null object. In R. Freidin (Ed.). Principles and Parameters in Comparative Grammar (pp. 56–76). Cambridge, MA: MIT Press.Google Scholar
Ivanov, I.
(2012) L2 acquisition of Bulgarian clitic doubling: A test case for the Interface Hypothesis. Second Language Research, 281, 345–68. DOI logoGoogle Scholar
Iverson, M., Kempchinsky, P., & Rothman, J.
(2008) Interface vulnerability and knowledge of the subjunctive/indicative distinction with negated epistemic predicates in L2 Spanish. EuroSLA Yearbook, 81, 135–63. DOI logoGoogle Scholar
Jaeger, F. T.
(2008) Categorical data analysis: away from ANOVAs (transformation or not) and towards Logit Mixed Models. Journal of Memory and Language, 591, 434–446. DOI logoGoogle Scholar
Jia, R. & Paradis, J.
(2015) The use of referring expressions in narratives by Mandarin heritage language children and the roles of language environment factors in predicting individual diferences. Bilingualism: Language and Cognition, 18–41, 737–752. DOI logoGoogle Scholar
Jin, H. G.
(1994) Topic-prominence and subject-prominence in L2 acquisition: Evidence of English-to-Chinese typological transfer. Language Learning, 441, 101–122.Google Scholar
Kagan, O., & Friedman, D.
(2004) Using the OPI to place heritage speakers of Russian. Foreign Language Annals, 36(4), 536–545. DOI logoGoogle Scholar
Kondo-Brown, K.
(2003) Heritage language instruction for post-secondary students from immigrant backgrounds. The Heritage Language Journal, 11, 1–25.Google Scholar
Laleko, O.
(2010) The syntax-pragmatics interface in language loss: Covert restructuring of aspect in heritage Russian. Ph. D. Dissertation, University of Minnesota.Google Scholar
Laleko, O. & Polinsky, M.
(2016) Between syntax and discourse: Topic and case marking in heritage speakers and L2 learners of Japanese and Korean. Linguistic Approaches to Bilingualism, 61, 396–439. DOI logoGoogle Scholar
Li, C. & Thompson, S.
(1976) Subject and topic: A new typology of language. In Li, Charles (Ed.), Subject and Topic (pp. 457–489). New York: Academic Press.Google Scholar
Li, R.
(2010) Anaphoric dependencies: Reflexive binding and null arguments in child Mandarin. Ph. D. Dissertation, City University of Hong Kong.Google Scholar
(2017) The child acquisition of null arguments. Foreign Language Teaching and Research, 21, 163–176.Google Scholar
Li, W. & Lee, S.
(2002) L1 development in an L2 environment: The use of Cantonese classifiers and quantifiers by young British-born Chinese in Tyneside. International Journal of Bilingual Education and Bilingualism, 41, 359–382.Google Scholar
Li, Y.-H. A.
(2007) Beyond empty categories. Ms., USC. DOI logoGoogle Scholar
(2011) Born empty and more. Paper presented at the annual meeting of the Linguistic Society of America, Pittsburgh, PA.
Light, T.
(1977) Claire talk: A Cantonese-speaking child’s confrontation with bilingualism. Journal of Chinese Linguistics, 51, 261–275.Google Scholar
Lozano, C.
(2006) The development of the syntax–discourse interface: Greek learners of Spanish. In V. Torrens & L. Escobar (Eds.). The acquisition of syntax in Romance languages (pp. 371–399). Amsterdam: John Benjamins. DOI logoGoogle Scholar
Mahajan, G.
(2009) Heritage-Schmeritage: It’s their language. Paper presented at the Second Language Acquisition Conference , San Diego CA, April 2009.
Mai, Z., Kwan, C., & Yip, V.
(2016) Expressing displacement in heritage Cantonese: Cross-linguistic influence and structural vulnerability. International Journal of Bilingualism, 22(6), 1–16.Google Scholar
Martin, C.
(2013) Assessing the oral proficiency of heritage speakers according to the ACTFL guidelines 2012 – Speaking. The Heritage Language Journal, 101, 73–87.Google Scholar
Malgaza, P. & Bel, A.
(2006) Null subjects at the syntax-pragmatics interface: Evidence from Spanish interlanguage of Greek speakers. In O’Brien, M. G., Shea, C., and Archibald, J. (Eds.). Proceedings of the 8th Generative Approaches to Second Language Acquisition Conference (GASLA 2006) (pp. 88–97). Somerville, MA: Cascadilla Proceedings Project.Google Scholar
Mendes, C. G. & Iribarren, C. I.
(2007) Fixação do parâmetro do sujeito nulo na aquisição do português europeu por hispanofalantes. In Lobo, M. & Coutinho, M. A. (Eds.). XXII Encontro Nacional da Associação Portuguesa de Linguística: Textos selecionados (pp. 483–498). Lisbon: Associação Portuguesa de Linguística.Google Scholar
Michnowicz, J.
(2015) Subject pronoun expression in Yucatan Spanish. In Cavalho, A., Orozco, R., and Shin, N. (Eds.). Subject Pronoun Expression in Spanish: A Cross-dialectal Perspective (pp. 103–121). Washington, D.C.: Georgetown University Press.Google Scholar
Montrul, S.
(2002) Incomplete acquisition and attrition of Spanish tense/aspect distinctions in adult bilinguals. Bilingualism: Language and Cognition, 51, 39–68. DOI logoGoogle Scholar
(2004) Subject and object expression in Spanish heritage speakers: A case of morpho-syntactic convergence. Bilingualism: Language and Cognition, 71, 125–142. DOI logoGoogle Scholar
(2005) Second language acquisition and first language loss in adult early bilinguals: Exploring some differences and similarities. Second Language Research, 211, 199–249. DOI logoGoogle Scholar
(2008) Incomplete acquisition in bilingualism. Re-examining the age factor. Amsterdam: John Benjamins. DOI logoGoogle Scholar
(2009) Internal and external interfaces in bilingual language development. International Journal of Bilingualism, 131, 195–210. DOI logoGoogle Scholar
(2011) Multiple interfaces and incomplete acquisition. Lingua, 1211, 591–604. DOI logoGoogle Scholar
Montrul, S., Foote, R., & Perpiñán, S.
(2008) Gender agreement in adult second language learners and Spanish heritage speakers: The effects of age and context of acquisition. Language Learning, 581, 503–553. DOI logoGoogle Scholar
Montrul, S. & Polinsky, M.
(2011) Why not heritage speakers? A response to Sorace. Linguistic Approaches to Bilingualism, 11, 58–62. DOI logoGoogle Scholar
O’Grady, W., Lee, M., & Choo, M.
(2001) The acquisition of relative clauses by heritage and non-heritage learners of Korean as a second language, a comparative study. Journal of Korean Language Education, 121, 283–294.Google Scholar
Paul, W. & Whitman, J.
(2017) Topic prominence. In M. Everaert & H. C. van Riemsdijk (Eds.). The Wiley Blackwell companion to syntax, second edition. John Wiley & Sons, Inc.. DOI logoGoogle Scholar
Polinsky, M.
(1997a) American Russian: Language loss meets language acquisition. In W. Browne et al. (Eds.). Formal Approaches to Slavic Linguistics (pp. 370–407). Ann Arbor: Michigan Slavic Publications.Google Scholar
(1997b) Cross-linguistic parallels in first language loss. Southwest Journal of Linguistics, 141, 87–123.Google Scholar
(2006) Incomplete acquisition: American Russian. Journal of Slavic Linguistics, 141, 191–262.Google Scholar
(2008) Gender under incomplete acquisition: Heritage speakers’ knowledge of noun categorization. Heritage Language Journal, 6–11, 40–71.Google Scholar
(2011) Reanalysis in adult heritage language: A case for attrition. Studies in Second Language Acquisition, 331, 305–328. DOI logoGoogle Scholar
(2018) Heritage languages and their speakers. Cambridge: Cambridge University Press. DOI logoGoogle Scholar
Polinsky, M. & Kagan, O.
(2007) Heritage languages: In the ‘wild’ and in the classroom. Language and Linguistics Compass, 11, 368–95. DOI logoGoogle Scholar
Polinsky, M. & Scontras, G.
(2020) Understanding heritage languages. Bilingualism: Language and Cognition, 23–11, 4–20. DOI logoGoogle Scholar
R Team
(2017) R: a language and environment for statistical computing. Retrieved from [URL]
Rizzi, L.
(1982) Issues in Italian syntax. Dordrecht: Foris. DOI logoGoogle Scholar
(1986) Null objects in Italian and the theory of pro . Linguistic Inquiry, 171, 501–557.Google Scholar
Rodriguez-Ordóñez, I. & Sainzmaza-Lecanda, L.
(2018) Bilingualism effects in Basque subject pronoun expression: Evidence from L2 Basque. Linguistic Approaches to Bilingualism, 81, 523–560. DOI logoGoogle Scholar
Rothman, J.
(2009a) Understanding the nature and outcomes of early bilingualism: Roman languages as heritage languages. International Journal of Bilingualism, 13–21, 155–163. DOI logoGoogle Scholar
(2009b) Pragmatic deficits with syntactic consequences: L2 pronominal subjects and the syntax–pragmatics interface. Journal of Pragmatics, 411, 951–973. DOI logoGoogle Scholar
Schwartz, B. D. & Sprouse, R. A.
(1996) L2 cognitive states and the full transfer/full access model. Second Language Research, 121, 40–72. DOI logoGoogle Scholar
Scontras, G., Polinsky, M., Tsai, C. Y. E., & Mai, K.
(2017) Cross-linguistic scope ambiguity: When two systems meet. Glossa: A journal of general linguistics, 2(1), 36. DOI logoGoogle Scholar
Scontras, G., Polinsky, M. & Fuchs, Z.
(2018) In support of representational economy: Agreement in heritage Spanish. Glossa: A journal of general linguistics, 3(1), 1. DOI logoGoogle Scholar
Shi, D.
(2000) Topic and topic-comment constructions in Mandarin Chinese. Language, 761, 383–408. DOI logoGoogle Scholar
Silva-Corvalán, C.
(1994) Language contact and change. Spanish in Los Angeles. Oxford: Oxford University Press.Google Scholar
Slabakovam, R.
(2008) Meaning in the second language. Mouton de Gruyter, Berlin. DOI logoGoogle Scholar
Slabakova, R. & Ivanov, I.
(2011) A more careful look at the syntax–discourse interface. Lingua, 1211: 637–51. DOI logoGoogle Scholar
Slabakova, R., Kempchinsky, P., & Rothman, J.
(2012) Clitic-doubled left dislocation and focus fronting in L2 Spanish: A case of successful acquisition at the syntax–discourse interface. Second Language Research, 281, 319–43. DOI logoGoogle Scholar
Song, M., O’Grady, W., Cho, S., & Lee, M.
(1997) The learning and teaching of Korean in community schools. In Kim, Y. H. (Ed.). Korean language in America 2 (pp. 111–127). American Association of Teachers of Korean, Hawaii.Google Scholar
Sorace, A.
(2000) Differential effects of attrition in the L1 syntax of near-native L2 speakers. In Proceedings of the 24th Boston University Conference on Language Development (pp. 719–215). Sommerville, MA: Cascadilla Press.Google Scholar
(2004) Native language attrition and developmental instability at the syntax-discourse interface: Data, interpretations and methods. Bilingualism: Language and Cognition, 71, 143–145. DOI logoGoogle Scholar
(2005) Syntactic optionality at interfaces. In L. Cornips & K. Corrigan (Eds.), Syntax and variation: Reconciling the biological and the social (pp. 46–111). Amsterdam: John Benjamins.Google Scholar
(2011) Pinning down the concept of ‘interface’ in bilingualism. Linguistic Approaches to Bilingualism, 11, 1–33. DOI logoGoogle Scholar
Sorace, A. & Filiaci, F.
(2006) Anaphora resolution in near-native speakers of Italian. Second Language Research, 221, 339–368. DOI logoGoogle Scholar
Sorace, A. & Serratrice, L.
(2009) Internal and external interfaces in bilingual language development: Beyond structural overlap. International Journal of Bilingualism, 131, 195–210. DOI logoGoogle Scholar
Sorace, A., Serratrice, L., Filiaci, F., & Baldo, M.
(2009) Discourse conditions on subject pronoun realization: Testing the linguistic intuitions of bilingual children. Lingua, 1191, 460–477. DOI logoGoogle Scholar
Taraldsen, T.
(1978) On the NIC, vacuous application, and the that-trace filter. Indiana University Linguistics Club, Bloomington.Google Scholar
(1980) On the NIC, vacuous application and the that-trace filter. MIT and Indiana Linguistics Club.Google Scholar
Tsimpli, I.
(2014) Early, late or very late. Timing acquisition and bilingualism. Linguistic Approaches to Bilingualim, 41, 283–313. DOI logoGoogle Scholar
Tsimpli, I., Sorace, A., Heycock, C. & Filiaci, F.
(2004) First language attrition and syntactic subjects: A study of Greek and Italian near-native speakers of English. International Journal of Bilingualism, 81, 257–277. DOI logoGoogle Scholar
Tsimpli, I. & Sorace, A.
(2006) Differentiating interfaces: L2 performance in syntax-semantics and syntax-discourse phenomena. In Bamman, D., Magnitskaia, T. & Zaller, C. (Eds.). Proceedings of the 30th Annual Boston University Conference on Language Development (pp. 653–664). Sommerville, MA: Cascadilla Press.Google Scholar
Valdés, G.
(1989) Teaching Spanish to Hispanic bilinguals: A look at oral proficiency testing and the proficiency movement. Hispania, 72(2), 392–401. DOI logoGoogle Scholar
Wang, Q., Lillo-Martin, D., Best, C. T., & Levitt, A.
(1992) Null subject vs. null object: some evidence from the acquisition of Chinese and English. Language Acquisition, 591, 221–254. DOI logoGoogle Scholar
Washio, R.
(1997) Resultatives, compositionality and language variation. Journal of East Asian Linguistics, 61, 1–49. DOI logoGoogle Scholar
Wexler, K.
(1998) Very early parameter setting and the unique checking constraint. Lingua, 1061, 23–79. DOI logoGoogle Scholar
White, L.
(2003) Second language acquisition and Universal Grammar. Cambridge: Cambridge University Press. DOI logoGoogle Scholar
White, L. & Genesee, F.
(1996) How native is near-native? The issue of ultimate attainment in adult second language acquisition. Second Language Research, 121, 233–265. DOI logoGoogle Scholar
White, L.
(2009) Grammatical theory: Interfaces and L2 knowledge. In Ritchie, W. & Bhatia, T. K. (Eds.). The New Handbook of Second Language Acquisition. Oxford: Blackwell.Google Scholar
Xiang, M., Polinsky, M., Kelly, K., Chen, L. I., & Wang, S.
(2009) The effect of partial semantic feature match in forward prediction and backward retrieval. Poster presented at CUNY 22, UC Davis.
Xu, L.
(1986) Free empty category. Linguistic Inquiry, 171, 75–93.Google Scholar
Yip, M. & Matthews, S.
(2010) The acquisition of Chinese in bilingual and multilingual contexts. International Journal of Bilingualism, 141, 127–146. DOI logoGoogle Scholar
Yuan, B.
(1993) Directionality of difficulty in second language acquisition of Chinese and English. PhD Dissertation, University of Edinburgh, UK.Google Scholar
(1995) Acquisition of base-generated topics by English-Speaking learners of Chinese. Language Learning, 451, 201–237. DOI logoGoogle Scholar
(2010) Domain-wide or variable-dependent vulnerability of the semantics – syntax interface in L2 acquisition? Evidence from wh-words used as existential polarity words in L2 Chinese grammars Second Language Research, 26 (2), 219–260. DOI logoGoogle Scholar
Zhao, X. L.
(2012) Interpretation of Chinese overt and null embedded arguments by English-speaking learners. Second Language Research, 28(2), 169–190. DOI logoGoogle Scholar
(2014) Ultimate attainment of anaphora resolution in L2 Chinese. Second Language Research, 30(3), 381–407. DOI logoGoogle Scholar
Zhu, J. & Gavarró, A.
(2019) Testing language acquisition models: null and overt topics in Mandarin. Journal of Child Language, 461, 707–732. DOI logoGoogle Scholar