Table 2.
Descriptive statistics of executive function performance by age group.
| Younger 3 | Older 3 | Younger 4 | Older 4 | Overall |
||
|---|---|---|---|---|---|---|
| Measure | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | Range |
| BWS | 0.73 (0.62) | 0.81 (0.72) | 1.16 (0.97) | 1.50 (1.05) | 1.09 (0.93) | 0–4 |
| DCCS | 3.06 (3.92) | 4.11 (4.27) | 5.56 (4.17) | 6.88 (3.78) | 5.07 (4.26) | 0–12 |
| GNG | 0.62 (0.28) | 0.65 (0.24) | 0.70 (0.21) | 0.74 (0.20) | 0.68 (0.23) | 0–100% |
BWS, highest list length at which the child was able to complete at least one trial of the Backward Word Span task; DCCS, the number of correct card sorts after the pre-switch phase of the Dimensional Change Card Sort task; GNG, proportional accuracy on no-go trials of the go/no-go task.