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| Control variable (N = 201) | Montessori (n = 99) | Traditional (n = 102) |
|---|---|---|
| Age (SD) | 8.91 (2.40) | 9.10 (2.28) |
| Age min, max | 4.37, 13.37 | 4.62, 13.28 |
| Gender, # of girls | 42 | 54 |
| Fluid intelligence | 30.5 (7.18) | 29.4 (6.63) |
| Socio-economic status | 0.70 (0.11) | 0.70 (0.12) |
