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Frequency of studies that measured each language domain.
| Language domain | Percentage (n) |
|---|---|
| Lexicon | 72% (23) |
| Syntax | 25% (8) |
| Literacy | 19% (6) |
| Phonology | 13% (4) |
| Overall language | 13% (4) |
| Morphology | 6% (2) |
NOTE: Some studies obtained measures from more than one domain, therefore the total percentage in this table is higher than 100%.
