This study examines the production of tense and aspect of Cypriot Greek adults diagnosed with Down Syndrome and children with typical language development. Despite the evidently low IQ scores, and comparatively lower MLU scores, the performance of Cypriot Greek adults with Down Syndrome with tense and aspect is almost at ceiling with 95.7% accuracy for tense and 97.2% for aspect. These results suggest that at least certain aspects of the Down Syndrome grammatical system (e.g. inflectional marking) can be (fully) acquired. It was observed that both groups have developed three coping strategies, when not using a verb as targeted or expected; they either (i) use an alternative feature value, (ii) omit the entire verb, or quite rarely (iii) omit the inflectional suffix. Inconsistencies in the results across different languages suggest that cross-linguistic differences potentially related to the inflectional system of each language might be responsible for the different realization of problematic performance. Keywords: Down Syndrome; language development; inflectional marking; tense; aspect
Antinucci, F. & R. Miller. 1976. How children talk about what happened. Journal of Child Language 31. 167–189.
Bloom, L., Lifter, K. & J. Hafitz. 1980. Semantics of verbs and the development of verb inflection in child language. Language 56(2). 386–412.
Bol, G. & K. Kasparian. 2009. The production of pronouns in Dutch children with developmental language disorders: A comparison between children with SLI, hearing impairment, and Down’s syndrome. Clinical Phonetics and Linguistics 23(9). 631–646.
Caselli, M.C., L. Monaco, M. Trasciani & S. Vicari. 2008. Language in Italian children with Down syndrome and with specific language impairment. Neuropsychology 221. 27–35.
Chapman, R.S. 1995. Language development in children and adolescents with Down syndrome. In Paul Fletcher & Brian MacWhinney (eds.), The handbook of child language, 664–689. Oxford, UK: Blackwell Publishers.
Chapman, R.S., H. Seung, S.E. Schwartz & E. Kay-Raining Bird. 1998. Language skills of children and adolescents with Down syndrome: II. Production deficits. Journal of Speech, Language, and Hearing Research 411. 861–873.
Cholmain, C.N. 1994. Working on phonology with young children with Down syndrome. Journal of Clinical Speech and Language Studies 11. 14–35.
Christodoulou, C. 2011. Cypriot-Greek down syndrome: Their grammar and its interfaces. Doctoral Dissertation, University of British Columbia, Vancouver, B. C.
Comrie, B. 1976. Aspect: An introduction to the study of verbal aspect and related problems. Cambridge, England: Cambridge University Press.
Delidaki, S. & S. Varlokosta. 2003. Testing the Aspect First Hypothesis: A preliminary investigation into the comprehension of tense in child Greek. ZAS Papers in Linguistics 291. 73–84.
Dodd, B. 1976. A comparison of the phonological systems of mental age matched, normal, severely subnormal and Down’s syndrome children. The British Journal of Disorders of Communication 111. 27–42.
Eadie, P.A., M.E. Fey, J.M. Douglas & C.L. Parsons. 2002. Profiles of grammatical morphology and sentence imitation in children with specific language impairment and Down syndrome. Journal of Speech, Language, and Hearing Research 451. 720–732.
Epstein, C.J. 2006. Down’s syndrome – Critical genes in a critical region. Nature 4411. 582–583.
Fodor, J. 1983. The modularity of mind. Cambridge, MA: MIT Press.
Fowler, A., R. Gelman & L. Gleitman. 1994. The course of language learning in children with Down syndrome. In H. Tager-Flusberg (ed.), Constraints on language acquisition: Studies of atypical children, 91–141. Hillsdale, NJ: Lawrence Erlbaum Associates.
Galeote, M., P. Soto, E. Checa, A. Gomez & E. Lamela. 2008. The acquisition of productive vocabulary in Spanish children with Down syndrome. Journal of Intellectual and Developmental Disability 331. 292–302.
Galeote, M., P. Soto, E. Sebastián, E. Checa & C. Sanchez-Palacios. 2013. Early grammatical development in Spanish children with Down syndrome. Journal of Child Language 411. 111–131.
Kemper, T. 1988. Neuropathology of Down syndrome. In L. Nadel (ed.), The psychobiology of Down syndrome, 269–289. Cambridge, MA: MIT Press.
Kumin, L. 2001. Speech intelligibility in individuals with Down syndrome: A framework for targeting specific factors for assessment and treatment. Down Syndrome Quarterly 61. 1.
Kumin, L., C. Councill & M. Goodman. 1994. A longitudinal study of the emergence of phonemes in children with Down syndrome. Journal of Communication Disorders 271. 293–303.
Laws, G. & D.V.M. Bishop. 2003. A comparison of language abilities in adolescents with Down syndrome and children with specific language impairment. Journal of Speech, Language, and Hearing Research 461. 1324–1339.
Leonard, L. 2000. Children with specific language impairment. Cambridge, MA: MIT Press.
Olson, L.E., J.T. Richtsmeier, J. Leszl & R.H. Reeves. 2004. A chromosome 21 critical region does not cause specific Down syndrome phenotypes. Science 3061. 687–690.
Perovic, A. 2006. Syntactic deficit in Down syndrome: More evidence for the modular organisation of language. Lingua 1161. 1616–1630.
Rice, M.L. & K. Wexler. 1996. Toward tense as a clinical marker of specific language impairment in English-speaking children. Journal of Speech, Language and Hearing Research 391. 1239–1257.
Ring, M. & H. Clahsen. 2005b. Morphosyntax in Down’s syndrome: Is the extended optional infinitive hypothesis an option?Stem-, Spraak-en Taalpathologie 131. 3–13.
Rizzi, L. 1994. Early null subjects and root null subjects. Syntactic Theory and First Language Acquisition: Cross-linguistic Perspectives 21. 249–272.
Rondal, J. & A. Comblain. 1996. Language in adults with Down syndrome. Down Syndrome Research and Practice 4(1). 3–14.
Sanoudaki, E. & S. Varlokosta. 2014. Pronoun comprehension in Down syndrome: Deviance or delay?Journal of Speech, Language and Hearing Research 571. 1442–1452.
Smith, N. & I. Tsimpli. 1995. The mind of a savant: Language learning and modularity. Oxford: Basil Blackwell.
Stathopoulou, N. 2009. The linguistic profile of Greek individuals with Down syndrome: Evidence from syntactic and morphological phenomena. Doctoral dissertation, University of Essex. Colchester, Essex.
Stathopoulou, N. & H. Clahsen. 2010. The perfective past tense in Greek adolescents with Down syndrome. Clinical Linguistics & Phonetics 241. 870–882.
Stephany, U. (1981): Verbal grammar in early modern Greek child language. In P.S. Dale & D. Ingram (eds.), Child Language: An International Perspective, 45–57. Baltimore: University Park Press.
Stoel-Gammon, C. 1980. Phonological analysis of four Down’s syndrome children. Applied Psycholinguistics 11. 31–48.
Stoel-Gammon, C. 1981. Speech development of infants and children with Down syndrome. In J. Darby (ed.), Speech Evaluation in Medicine, 341–360. New York, NY: Grune & Stratton.
Stoel-Gammon, C. 2001. Down syndrome phonology: Developmental patterns and intervention strategies. Down Syndrome Research and Practice 71. 93–100.
Thordardottir, E. 2008. Language-specific effects of task demands on the manifestation of specific language impairment: A comparison of English and Icelandic. Journal of Speech Language and Hearing Research 511. 922–937.
Tsakiridou, M. 2006. The linguistic profile of Down’s syndrome subjects: Evidence from Wh-movement construction. SOAS Working Papers in Linguistics, University College of London 141. 227–248.
Varlokosta, S. 1994. Issues on modern Greek sentential complementation. Doctoral dissertation, University of Maryland. College Park, Maryland.
Varlokosta, S., A. Vainikka & B. Rohrbacher. 1996. Root infinitives without infinitives. Proceedings of the 20th Annual Boston University Conference on Language Development, Vols 1 and 21. 816–827.
Van Borsel, J. 1996. Articulation in Down’s syndrome adolescents and adults. European Journal of Disorders of Communication 311. 415–444.
Vicari, S., M.C. Caselli & F. Tonucci. 2000. Asynchrony of lexical and morphosyntactic development in children with Down syndrome. Neuropsychologia 381. 634–644.
Vicari, S., M.C. Caselli, C. Gagliardi, F. Tonucci & V. Volterra. 2002. Language acquisition in special populations: A comparison between Down and Williams syndromes. Neuropsychologia 401. 2461–2470.
Wexler, K. 1994. Optional infinitives, head movement and the economy of derivations. In David Lightfoot & Norbert Hornstein (eds.), Verb movement, 305–362. Cambridge, England: Cambridge University Press.
Zagona, K. 2003. Tense and anaphora: Is there a tense-specific theory of coreference? In Andrew Barss (ed.), Anaphora: A reference guide, 140–171. Oxford: Blackwell.
Cited by (5)
Cited by five other publications
Mashaqba, Bassil, Eman Al Khalaf, Anas Huneety & Haneen Abu Sa’aleek
2024. Subject-verb agreement inflection in Arabic-speaking individuals with Down syndrome. Clinical Linguistics & Phonetics 38:7 ► pp. 587 ff.
Christodoulou, Christiana & Kenneth Wexler
2023. Copula Omission in Down Syndrome. Language Learning and Development 19:1 ► pp. 49 ff.
Katsarou, Dimitra & Georgia Andreou
2022. Morphosyntactic abilities in young children with Down syndrome: Evidence from the Greek language. International Journal of Language & Communication Disorders 57:5 ► pp. 937 ff.
Loveall, Susan J., Marie Moore Channell, Leonard Abbeduto & Frances A. Conners
2019. Verb production by individuals with Down syndrome during narration. Research in Developmental Disabilities 85 ► pp. 82 ff.
Christodoulou, Christiana & Kleanthes K. Grohmann
2018. From First Steps to Full Acquisition: Comprehension of Subjunctive Clauses in Bilectal Children With Down Syndrome and Typical Language Development. Frontiers in Communication 3
This list is based on CrossRef data as of 19 september 2024. Please note that it may not be complete. Sources presented here have been supplied by the respective publishers.
Any errors therein should be reported to them.