All four written CF types, including metalinguistic code CF, outperformed the control group on the delayed posttest of explicit L2 knowledge two weeks later.¶
Claim · All claims
Evidence · 1 study · causalr2·q3·i3large
Currency · newest study 2020 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · 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 i3 On the delayed error correction posttest, all experimental groups including the MC group scored significantly higher than the CO group with large effect sizes. → Jang 2020
Evidence¶
Jang 2020¶
Jang, Sung-Soo. (2020). The efficacy of different types of metalinguistic information in L2 written corrective feedback. English Teaching, 75(4), 33-56. https://doi.org/10.15858/engtea.75.4.202012.33
q3 · i3 · causal · r2
Delayed posttest results of the error correction test in the four-session experiment, taken two weeks after the final CF treatment. The study reports all experimental groups "outperformed the CO group on the delayed posttest with large effect sizes", including the MC group (d = 1.115).
"All the experimental groups outperformed the CO group on the delayed posttest with large effect sizes ( d = 1.424 for DR; d = 1.115 for MC; d = 2.038 for MS; d = 1.217 for MN)."
Discussion¶
Related Claims¶
- Corrective feedback on second-language errors has a significant effect on L2 development that is maintained on delayed tests — a broader claim this one bears on
- Corrective feedback facilitates L2 grammatical development, with explicit feedback stronger immediately and implicit feedback better maintained over time — a broader claim this one bears on
- All four written CF types, including metalinguistic code CF, outperformed the control group on the delayed posttest of implicit L2 knowledge. — related
- Metalinguistic written CF was equivalent, not superior, to non-metalinguistic direct CF, contrasting with previous studies whose metalinguistic CF also contained correct forms. — related
- Explicit instruction facilitates the acquisition of L2 grammar — related
- On the immediate posttest of explicit L2 knowledge, direct CF and metalinguistic CF with rule explanations outperformed the control group while metalinguistic code CF did not. — related
- On the immediate posttest of implicit L2 knowledge, direct CF and metalinguistic CF with rule explanations outperformed the control group while metalinguistic code CF did not. — related
- Prompts raised learners' pragmatic awareness of refusals more than explicit feedback or control after a 10-week treatment — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
cf-type-explicit-long-term-benefits |
title |
All four written CF types, including metalinguistic code CF, outperformed the control group on the delayed posttest of explicit L2 knowledge two weeks later. |
description |
All four written CF types, including metalinguistic code CF, outperformed the control group on the delayed posttest of explicit L2 knowledge two weeks later. |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2020 |
source_checked |
2026-10-20 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — jang-2020 |
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