Years covered
2012–2024
Updated twice per year.
Data catalog & quality metrics
Deep layer of the meta-study with direct references to effect sizes, sample sizes, and quality criteria. Powered by DataTables for quick sorting and exploration.
Total sample
268k
Learners across global regions.
Quality rating
84%
Studies with low risk of bias.
Data views
Switch between the full catalog and a quality-focused listing with methodological filters.
| Study | Region | Field | n | Effect d | Year |
|---|---|---|---|---|---|
| LEARN-Global | Europe | Reading | 12,450 | 0.47 | 2023 |
| STEM-Boost | North America | Mathematics | 18,230 | 0.52 | 2022 |
| Future Skills | APAC | Digital literacy | 9,870 | 0.39 | 2021 |
| MetaCog-24 | Europe | Metacognition | 6,110 | 0.58 | 2024 |
| Inclusion Labs | Global | Inclusion | 22,004 | 0.31 | 2020 |
| Study | Design | Peer review | Bias risk | Replications |
|---|---|---|---|---|
| LEARN-Global | Randomized | Yes | Very low | 3 |
| STEM-Boost | Quasi-experimental | Yes | Low | 2 |
| Future Skills | Mixed methods | Under review | Moderate | 1 |
| MetaCog-24 | Randomized | Yes | Very low | 2 |
| Inclusion Labs | Longitudinal | Yes | Moderate | 2 |