Table 10.
Cluster robust meta‐regression for effect size calculation method for academic effect sizes.
| Effect (n of effect sizes) | Hedges’ g | 95% CI of g | df | p |
|---|---|---|---|---|
| Other methoda (5) | 0.26 | (−0.41, 0.93) | 1.00 | 0.929 |
| Standardized mean raw score change (31) | −0.04 | (−0.84, 0.76) | 1.31 | 0.763 |
| Standardized mean difference (77) | −0.00 | (−0.52, 0.51) | 1.44 | 0.509 |
Note: N of studies = 24, N of effect sizes = 113, assumed ρ = 0.8, I 2 = 72.71. Cluster robust estimates with df < 4.00 should be interpreted with caution (Tanner‐Smith, Tipton, & Polanin, 2016). Positive effect sizes favor Montessori over traditional education.
Abbreviation: CI, confidence interval.
a
Reference category/intercept.