Follow-up testing six months after the programmes ended suggested the language impact may have increased over time, but this could not be established with confidence¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2016 · 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? At six-month follow-up, estimated impacts appeared larger than at post-test for both versions, but contamination of the control group prevents a confident conclusion. → Sibieta 2016
Evidence¶
Sibieta 2016¶
Sibieta, L., Kotecha, M., & Skipp, A. (2016). Nuffield Early Language Intervention: Evaluation report and executive summary. Education Endowment Foundation. https://educationendowmentfoundation.org.uk/projects/language-for-learning/
q3 · i? · causal · r2
Follow-up analysis of the same trial, conducted about six months after the interventions ended. By then some control pupils had begun receiving an alternative intervention (RALI), and the report says it is "not possible to say this with confidence"; no follow-up effect size is printed in the text provided.
"The results suggest that the impact may have actually increased over time (for both versions). However, it is not possible to say this with confidence because not enough is known about what other activities the children were involved in during the six-month follow up period."
Discussion¶
Related Claims¶
- The 20-week version of NELI improved language skills by an estimated two months of progress, though the evidence is less secure than for the 30-week version — related
- The 30-week Nuffield Early Language Intervention improved the language skills of children with low language ability, equivalent to about four months of additional progress — related
- Elaborative-interrogation learning gains are durable, with performance maintained up to six months after study — related
- IVR knowledge benefits appear immediately post-intervention but attenuate at later follow-up — related
- Neither the 30-week nor the 20-week version of NELI showed reliable short-term impact on children's word-level literacy skills — related
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