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Characteristics of Experiment 2 sample as a function of grade and activity group.
| Grade | Mean age (SD) | Age range | Gender | Knitting | Recess | n |
|---|---|---|---|---|---|---|
| 4th | 9 y. 8 m. (4 m.) | 9 y. 3 m.–10 y. 1 m. | 8 B /11 G | 9 | 10 | 19 |
| 5th | 10 y. 7 m. (4 m.) | 10 y. 0 m.–11 y. 2 m. | 7 B / 11 G | 10 | 8 | 18 |
| Total | 15 B /22 G | 19 | 18 | 37 |
