Table 1.
Demographic Information for the Sample at 7, 10, and 13 Years of Age
| Demographics | Age 7 (n = 7,900) | Age 10 (n = 7,519) | Age 13 (n = 6,782) |
|---|---|---|---|
| Female % | 49 | 50 | 50 |
| Parental HE% (age 18+) | 42 | 43 | 44 |
| Owned/mortgaged home % | 82 | 83 | 84 |
| Ethnicity, white % | 96 | 96 | 96 |
| Full scale IQ, mean (SD) (Range: 45−151)a | 105.30 (16.32) | 105.24 (16.39) | 105.70 (16.31) |
| Verbal IQ | 108.14 (16.68) | 108.08 (16.69) | 108.51 (16.63) |
| Performance IQ | 100.57 (16.94) | 100.59 (17.03) | 100.98 (16.93) |
Note: IQ age 7 (n = 5,829), 10 (n = 5,761), and 13 (n = 5,307) years. HE = higher education; SD = standard deviation.
a
Full range of scores at all ages.