The DOI matches its Crossref record; 111 of the 111 references it cites were found in a registry or an index.
Maturational constraints on language development.
Open accessAbstract
This article reviews the second language research on age-related differences, as well as first language work needed to disambiguate some of the findings. Five conclusions are drawn, (a) Both the initial rate of acquisition and the ultimate level of attainment depend in part on the age at which learning begins. (b) There are sensitive periods governing language development, first or second, during which the acquisition of different linguistic abilities is successful and after which it is irregular and incomplete. (c) The age-related loss in ability is cumulative (not a catastrophic one-time event), affecting first one linguistic domain and then another, and is not limited to phonology, (d) The deterioration in some individuals begins as early as age 6—not at puberty as is often claimed. (e) Affective, input, and current cognitive explanations for the reduced ability are inadequate. The capacity for language development is maturationally constrained, and its decline probably reflects a progressive loss of neural plasticity, itself possibly associated with increasing myelination.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The Biological Foundations of Language
Lenneberg, E. H. (1967) · Hospital Practice · doi:10.1080/21548331.1967.11707799 · Cited by 6,605
Educational Psychology: A Cognitive View
Ausubel, D. P., Novak, J. D., & Hanesian, H. (1968) · Medical Entomology and Zoology · Cited by 5,203
Educational Psychology: A Cognitive View
Gagné, R. M., Ausubel, D. P., & Gagne, R. M. (1969) · American Educational Research Journal · doi:10.2307/1161899 · Cited by 3,293
(1985) · Medical Entomology and Zoology · Cited by 3,037
Understanding second language acquisition
Ellis, R. (1985) · Cited by 2,937
Johnson, J. S., & Newport, E. L. (1989) · Cognitive Psychology · doi:10.1016/0010-0285(89)90003-0 · Cited by 2,724
Input in Second Language Acquisition
Bottigheimer, R. B., Gass, S. M., & Madden, C. G. (1986) · Modern Language Journal · doi:10.2307/327330 · Cited by 2,336
(1960) · Medical Journal of Australia · doi:10.5694/j.1326-5377.1960.tb76238.x · Cited by 2,178
Language Acquisition: The State of the Art
Wanner, E., & Gleitman, L. R. (2009) · Medical Entomology and Zoology · Cited by 2,022
Action, gesture, and symbol : the emergence of language
Lock, A. (1978) · Cited by 1,103
Research works printed but not linked: 32
- Neufeld, 1977, Language learning ability in adults: A study on the acquisition of prosodic and articulatory features, Working Papers on Bilingualism, 12, 45
- Hinde, 1970, Animal behavior
- McKinney V. (1983). First language learning in deaf persons beyond the critical period. Unpublished PhD thesis, Clairemont Graduate School, Clairemont, CA.
- Harley B. (1982). Age-related differences in the acquisition of the French verb system by anglophone students in French immersion programs. Unpublished PhD thesis, University of Toronto.
- Guiora A. , & Schonberger R. (1989, May). Native pronunciation of bilinguals. Paper presented at the first annual JAAL conference, Aoyama Gakuin University, Tokyo.
- Mayberry, 1983, Language in sign: International perspectives on sign language, 83
- Krashen, 1982, Child-adult differences in second language acquisition, 202
- Curtiss, 1980, The critical period and feral children, UCLA Working Papers in Cognitive Linguistics, 2, 21
- Bland, 1966, A self-controlled audio-lingual program for children, French Review, 40, 266
- Bellugi U. (1967). The acquisition of negation. Unpublished PhD thesis, Harvard University, Cambridge, MA.
- Bley-Vroman, The logical problem of foreign language learning, Linguistic Analysis
- Ekstrand, 1978, Didakometry, 60
- Adiv E. (1980). An analysis of second language performance in two types of immersion programs. Unpublished PhD thesis, McGill University, Montreal.
- Bateson, 1973, Constraints on learning, 77
- Ekstrand, 1976, Proceedings of the Fourth International Congress of Applied Linguistics, 3, 179
- McLaughlin, 1984, Second-language acquisition in childhood: Volume 1. Preschool children
- Snow, 1987, Sensitive periods in development: An interdisciplinary perspective, 183
- Hatch, 1977, Optimal age or optimal learners?, Workpapers in TESL, 11, 45
- Scarcella, 1982, Child-adult differences in second language acquisition, 175
- Rosansky, 1975, The critical period for the acquisition of language: Some cognitive developmental considerations, Working Papers on Bilingualism, 6, 10
- Schmidt, 1981, Interaction, acculturation and the acquisition of communicative competence, University of Hawaii Working Papers in Linguistics, 13, 29
- Young R. (1981). Sign language acquisition in a deaf adult: A test of the critical period hypothesis. Unpublished PhD thesis, University of Georgia, Athens.
- Wald, 1986, Diversity and diachrony. Current issues in linguistic theory, 53, 153
- Curtiss, 1988, Linguistics: The Cambridge Survey: Vol. 2. Linguistic theory: Extensions and implications, 96
- Scovel, 1981, Proceedings of the 5th Congress of AILA, 389
- Patkowski M. (1980a). The sensitive period for the acquisition of syntax in a secondary language. Unpublished PhD thesis, New York University, New York.
- Snow, 1983, Second language acquisition studies, 141
- Krashen, 1982, Child-adult differences in second language acquisition
- Slobin, 1982, Language acquisition: State of the art, 128
- Curtiss, 1982, Exceptional languages and linguistics, 285
- Ritchie, 1978, Second language acquisition research, 33
- David S. (1985). The acquisition of the phonological features of a second dialect. Unpublished master's thesis, University of South Carolina, Columbia.
Cited by
Sorted by citations
Items 601–700 of 1,000
Challenges in the perception of L2 English phonemes by native speakers of Cypriot Greek
Kkese, E. T., & Karpava, S. (2021) · Journal of Monolingual and Bilingual Speech · doi:10.1558/jmbs.15362 · Cited by 3
Identity, authenticity and dialect acquisition
Siegel, J. (2021) · Studies in language variation · doi:10.1075/silv.26.12sie · Cited by 3
Isasa, A. I. (2022) · Languages · doi:10.3390/languages7010007 · Cited by 3
Aktsendikorpus ja võõrkeele aktsendi uurimine
Meister, L., & Meister, E. (2012) · Keel ja Kirjandus · doi:10.54013/kk658a10 · Cited by 3
Revisiting the role of age in second language speech acquisition
Lee, A. H. (2022) · Journal of Second Language Pronunciation · doi:10.1075/jslp.21026.lee · Cited by 3
Cross-language influences in the acquisition of L2 and L3 phonology
Amengual, M. (2023) · Bilingual processing and acquisition · doi:10.1075/bpa.16.04ame · Cited by 3
Morphological variation in Southwestern Norwegian children’s role-play registers
Romarheim, O. S. (2025) · Nordic Journal of Linguistics · doi:10.1017/s0332586525100504 · Cited by 3
Birdsong, D. P. (1999) · Cited by 3
L’acquisition de la finitude en allemand L2 à différents âges
Dimroth, C. (2009) · Acquisition et interaction en langue étrangère · doi:10.4000/aile.4508 · Cited by 3
Changing perspectives on universal grammar and the critical period hypothesis
White, L. (2009) · Language · doi:10.11431/secondlanguage.8.0_3 · Cited by 3
Vocational College English Teaching Inspiration from Sociocultural Theory and Interaction Hypothesis
Zhang, L. (2014) · Advances in Social Science, Education and Humanities Research/Advances in social science, education and humanities research · doi:10.2991/icelaic-14.2014.43 · Cited by 3
Knight, P. T. (2014) · World Journal of English Language · doi:10.5430/wjel.v4n2p1 · Cited by 3
A Study on the Relationship between Age Onset of English Learning and English Achievement
Wang, M. (2015) · Theory and Practice in Language Studies · doi:10.17507/tpls.0501.22 · Cited by 3
The critical period and parameter setting in five cases of delayed L1 acquisition
Patkowski, M. S. (2013) · EUROSLA Yearbook · doi:10.1075/eurosla.13.03pat · Cited by 3
The Impact of Extensive and Intensive Focus on Form Strategies on EFL Learners' Oral Accuracy
Rahimpour, M., Salimi, A., & Farrokhi, F. (2012) · International Journal of Applied Linguistics & English Literature · doi:10.7575/ijalel.v.1n.6p.37 · Cited by 5
Sign Vocabulary Recognition in Students of American Sign Language
Lupton, L., & Fristoe, M. (1992) · Sign language studies · doi:10.1353/sls.1992.0024 · Cited by 3
First Person Singular: Building the road as we travel
Long, M. H. (2015) · Language Teaching · doi:10.1017/s0261444815000282 · Cited by 3
Self-citationCurrent Trends in SLA Rresearch and Directions for Future Development
Long, M. H. (2012) · Chinese Journal of Applied Linguistics · doi:10.1515/cjal-2012-0011 · Cited by 5
Self-citationSaud, A. (2016) · International Education Studies · doi:10.5539/ies.v9n10p263 · Cited by 3
Rôles de l’âge, de l’input et de la L1 dans le développement du français par des enfants L2
Granfeldt, J. (2016) · Revue française de linguistique appliquée · doi:10.3917/rfla.212.0033 · Cited by 3
Is There A Critical Period For Second Language Acquisition
Qingxin, Z. (2012) · Cited by 3
Leal, T., & Slabakova, R. (2011) · ePrints Soton (University of Southampton) · Cited by 3
A Longitudinal Evaluative Study on Child JFL Learners' Oral Performances
Kondo‐Brown, K. (2002) · Japanese Language and Literature · doi:10.2307/3250885 · Cited by 3
An Overview of the Persian EFL learners’ Spelling Difficulties
Alipour, M., Salehuddin, K., & Stapa, S. H. (2019) · International Journal of Multicultural and Multireligious Understanding · doi:10.18415/ijmmu.v6i6.822 · Cited by 5
Ellis, R., Skehan, P., Li, S., Shintani, N., & Lambert, C. (2019) · Cambridge University Press eBooks · doi:10.1017/9781108643689.012 · Cited by 3
Variance in a Second Language Pronunciation Quality
Kráľová, Z., & Krajčovič, M. (2009) · Communications - Scientific letters of the University of Zilina · doi:10.26552/com.c.2009.4.15-23 · Cited by 3
Gass, S. M., Plonsky, L., & Huntley, L. (2022) · Bilingual processing and acquisition · doi:10.1075/bpa.14.02gas · Cited by 3
Hwang, H. (2023) · Bilingualism Language and Cognition · doi:10.1017/s1366728923000640 · Cited by 4
Acoustic Cues to Speech Segmentation in Spoken French: Native and Nonnative Strategies
Shoemaker, E. M. (2009) · Cited by 3
Voice onset time and foreign accent detection : are L2 learners better than monolinguals?
Alba-Salas, J. (2004) · Revista Alicantina de Estudios Ingleses · doi:10.14198/raei.2004.17.02 · Cited by 3
ESOL : effective teaching and learning
Baynham, M. (2007) · Digital Education Resource Archive (University College London) · Cited by 3
The literacy and self-esteem of children attending Welsh-Medium and English-Medium schools in Wales
Young, N. E. (2014) · Bangor University Research Portal (Bangor University) · Cited by 3
Smit, M. (2009) · SUNScholar (Stellenbosch University) · Cited by 3
Simultaneous and Sequential Bilinguals in a German Bilingual Program
Dresser, R. A. H. (2012) · Libraries and Cultural Resources (University of Calgary) · doi:10.11575/prism/27789 · Cited by 3
Phonological short-term memory contributions to vocabulary acquisition
Masoura, E. V. (1999) · OpenGrey (Institut de l'Information Scientifique et Technique) · Cited by 3
Gnevsheva, K. (2015) · UC Research Repository (University of Canterbury) · doi:10.26021/4348 · Cited by 3
Ritchie, W. C., & Bhatia, T. K. (2008) · Wiley eBooks · doi:10.1002/9780470694138.ch4 · Cited by 3
Current age and language use impact speech-in-noise differently for monolingual and bilingual adultsPreprint
Bieber, R. E., Phillips, I., Ellis, G. M., & Brungart, D. S. (2024) · doi:10.31234/osf.io/7jxvc · Cited by 3
Meisel, J. M. (2019) · Cambridge University Press eBooks · doi:10.1017/9781316850329.003 · Cited by 2
Voice onset time (VOT) of L3 Spanish /ptk/ by multilingual heritage speakers of Ukrainian and Polish
Bondarenko, M., Butera, B., & Rao, R. (2022) · EuroAmerican Journal of Applied Linguistics and Languages · doi:10.21283/2376905x.15.1.225 · Cited by 2
The Role of Age in Second Language Acquisition
Yaş, E. (2024) · Cankaya University Journal of Humanities and Social Sciences · doi:10.47777/cankujhss.1570045 · Cited by 2
Current Age and Language Use Impact Speech-in-Noise Differently for Monolingual and Bilingual Adults
Bieber, R. E., Phillips, I., Ellis, G. M., & Brungart, D. S. (2025) · Journal of Speech Language and Hearing Research · doi:10.1044/2024_jslhr-24-00264 · Cited by 5
Understanding accentedness in heritage language English speakers: Key predictors
Gordon, S., & Meir, N. (2025) · Bilingualism Language and Cognition · doi:10.1017/s1366728925000288 · Cited by 2
Bilinguals' metacognition is affected by the language used as a medium of education
Ordin, M., & Polyanskaya, L. (2025) · Review of Education · doi:10.1002/rev3.70088 · Cited by 2
Lima, R. M. (2015) · Revista Horizontes de Linguistica Aplicada · doi:10.26512/rhla.v13i2.1362 · Cited by 2
Comas, S. F., Muxí, C. F., & González-Davies, M. (2011) · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Cited by 3
Fiadzawoo, J. K., Yegblemenawo, S. A. M., & Quansah, J. Y. D. (2017) · European Scientific Journal ESJ · doi:10.19044/esj.2017.v13n1p225 · Cited by 2
A Review of the Critical Period Hypothesis in Second Language Acquisition
Li, Q. (2018) · International Journal of Linguistics and Communication · doi:10.15640/ijlc.v6n2a2 · Cited by 2
The development of obligatory liaison in early L2 learners of French
Splendido, F. (2019) · Language Interaction and Acquisition · doi:10.1075/lia.17024.spl · Cited by 2
Garrido, L. Z., & Aguiar, V. M. (2019) · ELUA Estudios de Lingüística Universidad de Alicante · doi:10.14198/elua2019.33.12 · Cited by 2
Evaluating Task-Based Language Teaching
Ellis, R., Skehan, P., Li, S., Shintani, N., & Lambert, C. (2019) · Cambridge University Press eBooks · doi:10.1017/9781108643689.017 · Cited by 2
The Research on Critical Period Hypothesis in Pronunciation Learning in Second Language Acquisition
Pang, D. (2022) · The Educational Review USA · doi:10.26855/er.2022.11.014 · Cited by 2
Teacher Perceptions on L2 Acquisition and Education Practice for English Language Learners
Chen-Worley, S. J. (2023) · Excelsior Leadership in Teaching and Learning · doi:10.14305/jn.19440413.2023.15.1.05 · Cited by 2
PRONUNCIATION PERILS: OVERCOMING PHONETIC INTERFERENCE IN LANGUAGE LEARNING
Лисенко, К., & Нестеренко, Н. (2024) · ГРААЛЬ НАУКИ · doi:10.36074/grail-of-science.10.05.2024.059 · Cited by 2
Thakkar, V. J., Crupper, J., Engelhart, A. S., & Centanni, T. M. (2024) · Journal of Neurolinguistics · doi:10.1016/j.jneuroling.2024.101225 · Cited by 2
Tuning in to the prosody of a novel language is easier without orthography
Chládková, K., Podlipský, V. J., Jarůšková, L., & Šimáčková, Š. (2025) · Bilingualism Language and Cognition · doi:10.1017/s1366728925000082 · Cited by 2
L2 speakers are more flexible than L1 speakers in second dialect acquisition
Gnevsheva, K., & Szakay, A. (2025) · International Journal of Bilingualism · doi:10.1177/13670069251340258 · Cited by 2
Ashrafganjoe, M., & Narafshan, M. H. (2016) · Studies in English Language Teaching · doi:10.22158/selt.v4n2p223 · Cited by 2
A longitudinal study of early English; immersion and literacy in Xi'an, China
Knell, E. (2012) · ProQuest LLC eBooks · doi:10.26053/0h-z5c7-4800 · Cited by 2
Cairns, R. J. (2015) · ScholarsArchive (Brigham Young University) · Cited by 2
Escutia, M. (2005) · Atlantis: Revista de la Asociación Española de Estudios Anglo-Norteamericanos · Cited by 2
Aslan, E. (2014) · Language Learning Journal · doi:10.1080/09571736.2014.934271 · Cited by 2
Young-Scholten, M. (2013) · Educational linguistics · doi:10.1007/978-94-007-6362-3_11 · Cited by 2
Shoarnaghavi, R., Seifoori, Z., & Ghafoori, N. (2014) · Procedia - Social and Behavioral Sciences · doi:10.1016/j.sbspro.2014.03.604 · Cited by 3
Key Issues in Second Language Acquisition since the 1990s
Wang, S. (2015) · Theory and Practice in Language Studies · doi:10.17507/tpls.0509.21 · Cited by 2
Contesse, C. A. (2008) · Estudios de Lingüística Aplicada · doi:10.22201/enallt.01852647p.2008.47.566 · Cited by 2
Külekçi, G. (2014) · Participatory Educational Research · doi:10.17275/per.14.04.1.1 · Cited by 2
Dutch vowel production by Spanish learners: duration and spectral features
Burgos, P., Jani, M., Catia Cucchiarini, A., van Hout, R. W. N. M., & Strik, H. (2014) · Interspeech (USB) · doi:10.21437/interspeech.2014-130 · Cited by 2
Resolving pronominal anaphora in real-time
Contemori, C., Pozzo, L. D., & Matteini, S. (2015) · Linguistik aktuell · doi:10.1075/la.223.12con · Cited by 2
9. Age of Second-Language Acquisition: Critical Periods and Social Concerns
(2016) · De Gruyter eBooks · doi:10.1515/9783110341249-011 · Cited by 2
The Myth of the Critical Period
Strid, J. E. (2016) · TESOL Journal · doi:10.1002/tesj.296 · Cited by 4
Age factor in the selection of strategies for learning English in elementary school
Pilipović, V., & Glušac, T. (2015) · Nastava i vaspitanje · doi:10.5937/nasvas1502343p · Cited by 2
Effects of Fine-Tuning Instruction on Second Language Pronunciation
Lee, H. (2017) · The Korean Language in America · doi:10.5325/korelangamer.21.1.0089 · Cited by 2
Modesto, F., & Barbosa, P. A. (2018) · Revista de Estudos da Linguagem · doi:10.17851/2237-2083.27.1.165-189 · Cited by 2
Neuroemergentism: At the intersection of ontogeny and phylogeny
Marian, V., & Hayakawa, S. L. (2018) · Journal of Neurolinguistics · doi:10.1016/j.jneuroling.2018.05.001 · Cited by 2
When labeling L2 users as nativelike or not, consider classification errors
Vanhove, J. (2019) · Second language Research · doi:10.1177/0267658319827055 · Cited by 3
Probing rhythmic patterns in english-L2
Lima, R. M., & Garcia, G. D. (2017) · Journal of Speech Sciences · doi:10.20396/joss.v6i1.14984 · Cited by 2
Ist jünger immer besser? Frühes Fremdsprachenlernen in der Grundschule
Fleckenstein, J., Møller, J., & Baumert, J. (2020) · Zeitschrift für Pädagogische Psychologie · doi:10.1024/1010-0652/a000267 · Cited by 2
The Pedagogic Background to Task-Based Language Teaching
Ellis, R., Skehan, P., Li, S., Shintani, N., & Lambert, C. (2019) · Cambridge University Press eBooks · doi:10.1017/9781108643689.004 · Cited by 3
Ellis, R., Skehan, P., Li, S., Shintani, N., & Lambert, C. (2019) · Cambridge University Press eBooks · doi:10.1017/9781108643689.007 · Cited by 2
Ellis, R., Skehan, P., Li, S., Shintani, N., & Lambert, C. (2019) · Cambridge University Press eBooks · doi:10.1017/9781108643689.008 · Cited by 3
Self-Directed Learning of Malay Undergraduate Students
Ahmad, B. E., Saad, Z. A., Aminuddin, A. S., & Abdullah, M. A. (2023) · Studies in Self-Access Learning Journal · doi:10.37237/140302 · Cited by 5
The Phonetics/Phonology Interface
Archibald, J. (2023) · Oxford University Press eBooks · doi:10.1093/oso/9780190923334.003.0003 · Cited by 5
Second language acquisition research : theoretical and methodological issues
Gass, S. M., Schachter, J., & Mackey, A. (1994) · Cited by 2
The Production of Similar and Dissimilar Sounds on Second Language Acquisition
Yoon, E. (2007) · 언어와 언어학 · Cited by 2
Maturational constraints in adult SLA
Burgo, C. (2006) · LL Journal · Cited by 2
Inflected infinitives in L2 Portuguese
Madeira, A. (2018) · Issues in Hispanic and Lusophone linguistics · doi:10.1075/ihll.17.11mad · Cited by 2
Sülükçü, Y. (2018) · Journal of Education and Training Studies · doi:10.11114/jets.v6i11.3472 · Cited by 2
Ji, F. (2021) · Journal of Higher Education Research · doi:10.32629/jher.v2i3.324 · Cited by 2
Teachers’ belief on Early Second Language Acquisition in Indonesian Bilingual School
Syafrizal, S., Yuniarti, T. E., & Sofyana, U. (2020) · Journal of English Language Studies · doi:10.30870/jels.v5i1.7116 · Cited by 2
Contribution of prosodic timing patterns into perceived foreign accent
Polyanskaya, L. (2015) · PUB – Publications at Bielefeld University (Bielefeld University) · Cited by 2
ACOUSTIC MEASUREMENT OF CANADIAN ENGLISH-ACCENTED FRENCH
Gavac, N. (2006) · Summit (Simon Fraser University) · Cited by 2
The production and the perception of English vowels by Mandarin speakers
Yu, Z. (2012) · UVic’s Research and Learning Repository (University of Victoria) · Cited by 2
The Syntax and Acquisition of Negative Polarity Items in Heritage Korean
Kim, S.-J. (2012) · KU ScholarWorks (The University of Kansas) · Cited by 2
Potgieter, A. P. (2011) · SUNScholar (Stellenbosch University) · Cited by 2
The influence of L2 experience on the perception of nonnative phonemic contrasts
ShinSook, L. (2010) · Studies in Phonetics Phonology and Morphology · doi:10.17959/sppm.2010.16.1.123 · Cited by 2
LA INSTRUCCIÓN GRAMATICAL EN EL ENFOQUE COMUNICATIVO
Olivares, J. O. (1999) · Dialnet (Universidad de la Rioja) · Cited by 2
Hahn, H.-R. (1999) · Seoul National University Open Repository (Seoul National University) · Cited by 2
Vila, C. L. (2018) · RIUVic (UVic-UCC) · Cited by 2
Metadata
- Authors
- Long, M. H.
- Affiliations
- University of Hawaiʻi at Mānoa (US)
- Corresponding author
- Long, Michael H.
- ORCID
- Long, Michael H.
- Venue
- Studies in Second Language Acquisition
- Publisher
- Cambridge University Press (CUP)
- Published
- 1990-09
- Volume
- 12
- Issue
- 3
- Pages
- 251-285
- ISSN
- 0272-2631 (ISSN-L)
- 1470-1545
- OpenAlex
- W2034658764
- Cited by
- 1,090
- References
- 110
- Citations by year
- 2026: 11 · 2025: 20 · 2024: 49 · 2023: 42 · 2022: 41 · 2021: 30 · 2020: 39 · 2019: 67 · 2018: 47 · 2017: 35 · 2016: 40 · 2015: 56 · 2014: 47 · 2013: 49 · 2012: 58
- FWCI
- 13.99
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Studies in Second Language Acquisition (publishedVersion)
- Topics
- Social Sciences › Psychology › Developmental and Educational Psychology › Language Development and Disorders
- Social Sciences › Arts and Humanities › Language and Linguistics › EFL/ESL Teaching and Learning
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
- Keywords
- critical period hypothesis, sensitive period, age of onset, second language acquisition, first language development, language loss, neuroplasticity, myelination, phonological development
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review