Claims

Only 112 of 306 studies were potentially suitable for meta-analysis, with most excluded for design and reporting inadequacies

Claim · All claims
Evidence · 1 study · quant-synthesis r2 · q3
Currency · newest study 2011 · 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? Four screening criteria identified 112 studies as potentially relevant for the meta-analysis, but a second round of scrutiny excluded many for unsuitable designs, different research questions, incomplete reporting, or no clear basis for comparison. → Douglas Biber 2011

Evidence

Douglas Biber 2011

Douglas Biber, Tatiana Nekrasova, and Brad Horn. (2011). The Effectiveness of Feedback for L1-English and L2-Writing Development: A Meta-Analysis. ETS Research Report RR-11-05. https://www.ets.org/toefl

q3 · i? · quant-synthesis · r2

The meta-analysis screening (Section 4.1) required publication between 1982 and 2007, quantitative measures with an experimental or quasi-experimental design, feedback-characteristic independent variables, and writing-behavior outcome indicators: "112 studies were identified as potentially relevant for the meta-analysis." Reported exclusions include 24 correlational designs, 24 with incomplete statistical reporting, 16 addressing different questions, 14 with no comparison basis, and 11 with multiple treatments and a single posttest.

"Based on these criteria, 112 studies were identified as potentially relevant for the meta-analysis. These studies were then subjected to a second round of closer scrutiny to determine if the design and reporting standards were in fact adequate for our purposes here."

Discussion

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