Cochrane · systematic review · CD014890
Vocabulary interventions for second language (L2) learners up to six years of age
Hjetland, HN, Hofslundsengen, H, Klem, M, et al. · Cochrane Database of Systematic Reviews · 2023 · Cochrane Library
Developmental, Psychosocial and Learning ProblemsAMSTAR 2: not assessed
SoF tableOnly the outcomes this review put in its Summary of Findings table are listed (the Cochrane Handbook caps them at about seven per comparison). Its other analyses are not shown here.
Questions
7
current version
GRADE rated
7
No studies
0
Included studies
NR
No studies 0 · 0%Ungraded 0 · 0%Very low 3 · 42.9%Low 1 · 14.3%Moderate 3 · 42.9%High 0 · 0%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Questions and results
Summary of findings table ‐ Vocabulary interventions compared with standard care for second language (L2) learners up to six years of age
Population: second language (L2) learners up to six years of age
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Receptive L2 proximal vocabulary (understanding of words taught in the intervention) Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 4 studies · 1073 participants | Very low Downgraded: risk of bias, imprecision, inconsistency |
Receptive L2 distal vocabulary (understanding of words not included in the intervention) Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 6 studies · 1074 participants | Low Downgraded: risk of bias, inconsistency |
Expressive L2 proximal vocabulary (expressing or producing words taught in the intervention) Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 6 studies · 1121 participants | Very low Downgraded: risk of bias, imprecision, inconsistency |
Expressive L2 distal vocabulary (expressing or producing words not taught in the intervention) Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 7 studies · 960 participants | Moderate Downgraded: risk of bias |
Mean length of utterance (MLU) Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 1 study · 1 participants | Moderate Downgraded: risk of bias |
L2 listening comprehension Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 2 studies · 294 participants | Very low Downgraded: risk of bias, imprecision, inconsistency |
L2 narrative skills Summary of findings table ‐ Vocabulary interventions vs standard care | no estimate extracted | 2 studies · 487 participants | Moderate Downgraded: risk of bias |