Table 2 Cognitive and social-emotional development, by child sex
Girls | Boys | |
|---|---|---|
At 1 year (n = 1,333) | ||
BSID-III, scaled scores | ||
Cognitive | 112.0 ± 10.5 | 112.4 ± 10.0 |
Language | 98.4 ± 11.0** | 96.8 ± 11.0 |
Overall | 105.2 ± 9.0 | 104.6 ± 8.7 |
At 2 years (n = 1,461) | ||
BSID-III, scaled scores | ||
Cognitive | 100.4 ± 10.0** | 98.8 ± 9.8 |
Language | 103.5 ± 10.3*** | 101.1 ± 11.2 |
Overall | 102.0 ± 9.1*** | 99.9 ± 9.5 |
Social emotion | 9.3 ± 3.6*** | 8.6 ± 3.2 |
At 6–7 years (n = 1,318) | ||
WISC-IV, scaled scores | ||
Verbal comprehension | 81.5 ± 12.0 | 82.0 ± 12.8 |
Perceptual reasoning | 93.0 ± 14.0 | 93.2 ± 14.9 |
Working memory | 102.7 ± 11.1** | 101.0 ± 11.9 |
Processing speed | 90.2 ± 11.9* | 88.6 ± 12.6 |
Overall FSIQ | 88.5 ± 11.7 | 88.0 ± 12.5 |
Social emotion | 6.0 ± 2.9 | 5.8 ± 2.8 |