| Titre : | Investigating the Impact of Bilingualism on the Cognitive and Linguistic Development of Middle School Students with Developmental Language Disorder: A Case Study in Saida |
| Auteurs : | K NADRI, Auteur ; P/LLA Dr. Hadjira HICHOUR, Directeur de thèse |
| Type de document : | texte imprimé |
| Editeur : | SAIDA [ALGERIE] : 1- University of Saida - Dr. Moulay Tahar / Faculty of Letters, Languages and Arts Department of English Language and Literature, 2025-2026 |
| Format : | 120p / 27cm |
| Accompagnement : | +CD-ROM |
| Langues: | Anglais |
| Catégories : | |
| Note de contenu : |
Table of Contents
Declaration of Originality...............................................................................................II Dedication ..................................................................................................................... III Acknowledgements.......................................................................................................IV ABSTRACT................................................................................................................... V LIST OF FIGURES ................................................................................................... VIII LIST OF ABBREVIATIONS.......................................................................................IX LIST OF APPENDICES................................................................................................ X General Introduction ....................................................................................................... 1 1.1 Introduction............................................................................................................... 7 1.2 Definition of bilingualism......................................................................................... 8 1.2.1 Types of bilingualism ............................................................................................ 9 1.2.2 Theoretical Perspectives on Bilingual Language Development.......................... 11 1.3 Developmental Language Disorder ........................................................................ 16 1.3.1 Definitions and Terminology of Developmental Language Disorder................. 16 1.3.2 Linguistic and Cognitive Characteristics of Developmental Language Disorder18 1.3.3 Causes and Diagnostic Challenges of Developmental Language Disorder......... 23 1.4 Bilingualism and Developmental Language Disorder............................................ 24 1.4.1 Assessment and Identification of DLD in Bilinguals.......................................... 26 1.5 Existing Research on DLD in the Algerian and Arabic-Speaking Context............ 27 1.6 Conclusion .............................................................................................................. 28 2.1 Introduction............................................................................................................. 30 2.2 Research paradigm.................................................................................................. 30 2.3 Philosophical Assumptions..................................................................................... 31 2.4 Research design ...................................................................................................... 32 2.5 Participants.............................................................................................................. 35 2.5.1 Sample and sampling technique .......................................................................... 35 2.5.2 Inclusion and Exclusion criteria .......................................................................... 36 2.6 Context and Setting................................................................................................. 36 2.7 Instruments.............................................................................................................. 37 2.7.1 The first screening test......................................................................................... 38 VII 2.7.2 The second screening test .................................................................................... 41 2.7.3 The bilingual profiling test................................................................................... 44 2.7.4 Cognitive Assessment Battery ............................................................................. 45 2.7.5 Linguistic Assessment Battery............................................................................. 49 2.7.6 Classroom Observation........................................................................................ 53 2.8 Data analysis........................................................................................................... 54 2.9 Validity and Reliability........................................................................................... 56 2.10 Ethical considerations........................................................................................... 57 2.11 Conclusion ............................................................................................................ 58 3.1 Introduction............................................................................................................. 59 3.2.1 Participants Overview.......................................................................................... 60 3.2.2 Participants’ Bilingual Profiles............................................................................ 62 3.2.3 The impact of Bilingualism on linguistic skills................................................... 63 3.2.4 The Impact of Bilingualism on Cognitive Skills................................................. 65 3.2.5 Most Affected Linguistic and Cognitive Skills .................................................. 67 3.2.6 The influence of bilingual type on linguistic and cognitive domains.................. 69 3.2.7 Classroom Observation Findings:........................................................................ 72 3.2.8 Summary of Findings........................................................................................... 74 3.3.1 Discussion of Research Question One: The Impact of Bilingualism on Linguistic Skills......................................................................................................... 75 3.3.2 Discussion of Research Question Two: The Impact of Bilingualism on Cognitive Skills.............................................................................................................................. 80 3.3.3 Sub-Hypothesis One: Differential Vulnerability Across Linguistic and Cognitive Domains........................................................................................................................ 85 3.3.4 Sub-Hypothesis Two: The Influence of Bilingual Type on Linguistic and Cognitive Development ................................................................................................ 86 3.3.5 Triangulation of Quantitative and Qualitative Findings...................................... 87 3.4.1 Implications for Teaching and Teacher Training ................................................ 88 3.4.2 Implications for Assessment and Clinical Practice.............................................. 89 3.4.3 Implications for Educational Policy .................................................................... 90 3.5.1 Sample Size and Subgroup Limitations............................................................... 90 3.5.2 Instrument Validation .......................................................................................... 91 3.5.3 Absence of a Monolingual Comparison Group ................................................... 91 VIII 3.5.4 Cross-Sectional Design........................................................................................ 92 3.5.5 Unstructured Observation .................................................................................... 92 3.6.1 Recommendations for Future Research............................................................... 92 3.6.2 Instrument Development and Validation............................................................. 93 3.6.3 Longitudinal Research ......................................................................................... 93 3.6.4 Investigating Anomalous Findings...................................................................... 93 3.6.5 Parental and Community Attitudes Toward DLD ............................................... 93 3.7 Conclusion .............................................................................................................. 94 General Conclusion....................................................................................................... 94 REFERENCES ............................................................................................................. 97 Appendices....................................................................................................................XI |
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