Knowledge mapping of Specific Language Impairment in children: A bibliometric analysis (2010–2024)
Bibliographic record
Abstract
BACKGROUND: Specific Language Impairment (SLI), increasingly termed Developmental Language Disorder (DLD), affects 7-10% of children worldwide. Despite expanding research, no comprehensive bibliometric analysis has systematically examined this field's evolution. METHODS: We analyzed 4,966 SLI/DLD-related publications (2010-2024) from the Web of Science Core Collection using VOSviewer, CiteSpace, and bibliometrix to assess publication trends, collaboration networks, citation patterns, and research themes. RESULTS: Publication output increased 256% over the study period, with the United States (41.1%) and England (13.1%) dominating contributions. The University of Toronto, University of Melbourne, and University College London emerged as leading institutions. The Journal of Speech, Language, and Hearing Research(JSLHR) was most influential. Research evolved through three phases: linguistic components (2012-2016), neurodevelopmental mechanisms (2016-2020), and holistic therapies (2020-2024). Key themes included methodological frameworks, comorbidities with neurodevelopmental disorders, and intervention strategies. CONCLUSION: This first comprehensive bibliometric analysis reveals SLI/DLD research evolving from isolated linguistic investigations toward integrated neurodevelopmental frameworks and therapeutic approaches. The field shows increasing recognition of shared mechanisms across developmental conditions and growing emphasis on early intervention. Our findings highlight critical research directions including expanded international collaboration, cross-disorder research exploring shared neurobiological mechanisms, longitudinal intervention studies, and technology-enhanced assessment methodologies.
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How this classification was reachedexpand
Direct model labels (unvalidated)
Per-model category and study-design labels from the labeling rounds. They are machine output, unvalidated, and the disagreement between models ships as data. No study design here is MEDLINE-validated yet.
| Model arm | Categories | Study design | Confidence |
|---|---|---|---|
| gemma | Bibliometrics Domain: not available · Genre: Empirical About the Canadian research system: no · About a Canadian topic: no | Observational | low |
| gpt | Bibliometrics Domain: not available · Genre: Empirical About the Canadian research system: no · About a Canadian topic: no | Observational | high |
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.071 | 0.135 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedLabeled directly by 2 models reading the full record.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".