Viewing captioned instructional videos significantly improves EFL learners' vocabulary acquisition compared to viewing without captions.¶
Claim · All claims
Evidence · 1 study (2 entries) · causalr1–r2·q3
Currency · newest study 2014 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? The experimental group scored significantly higher on the vocabulary sub-section of the Content Specific Tests than the control group. → BavaHarji 2014
q3 i? The experimental group scored significantly higher on the vocabulary sub-section of the post-MET than the control group. → BavaHarji 2014 (2)
Evidence¶
BavaHarji 2014¶
BavaHarji, M., Alavi, Z. K., & Letchumanan, K. (2014). Captioned Instructional Video: Effects on Content Comprehension, Vocabulary Acquisition and Language Proficiency. English Language Teaching, 7(5). https://doi.org/10.5539/elt.v7n5p1
q3 · i? · causal · r2
A quasi-experimental study of 92 Iranian EFL undergraduates randomly assigned to captioned (n=45) or non-captioned (n=47) video viewing over five weeks found a significant difference on the vocabulary sub-section of the Content Specific Tests, t(90) = -5.78, p = .000, with a mean difference of "14.41, in favour of the experiment group".
"there was a wider mean difference of 14.41, in favour of the experiment group for the vocabulary section (Experimental, M = 46.20; Control, M = 31.79"
BavaHarji 2014 (2)¶
BavaHarji, M., Alavi, Z. K., & Letchumanan, K. (2014). Captioned Instructional Video: Effects on Content Comprehension, Vocabulary Acquisition and Language Proficiency. English Language Teaching, 7(5). https://doi.org/10.5539/elt.v7n5p1
q3 · i? · causal · r1
The same study found a significant difference on the vocabulary sub-section of the post-MET, "vocabulary (t = -2.97, p = .004)", with the experimental group (M = 19.13) outperforming the control group (M = 17.04).
"vocabulary (t = -2.97, p = .004)"
Discussion¶
Related Claims¶
- Viewing captioned instructional videos significantly improves EFL learners' overall language proficiency compared to viewing without captions. — related
- Viewing captioned instructional videos does not significantly improve EFL learners' content comprehension compared to viewing without captions. — related
- Viewing instructional videos improves EFL learners' language proficiency regardless of whether captions are present. — related
- EFL learners perceive captioned instructional videos as helpful for vocabulary acquisition but not as a distraction to comprehension. — related
- Providing captions of any type improved general listening comprehension of EFL students compared with no captions — related
- Full captions significantly improved EFL learners' general listening comprehension from pre-test to post-test — related
- Captioning second-language videos produces large benefits for comprehension and vocabulary acquisition — a broader claim this one bears on
- Adventure video games with supplementary vocabulary material outperform control conditions on receptive and productive vocabulary tests — related
Page metadata
| Field | Value |
|---|---|
status |
review |
generated |
by process:wiki-ingest on 2026-11-03 |
trust |
unverified — no one has confirmed this page's content |
Frontmatter is the page's machine-readable record — see the Schema & Guide.