Table 1.
Demographic characteristics
| Group | Number | IQ (s.d.) | SES*(s.d.) | Ethnicity** | Handedness | ||
|---|---|---|---|---|---|---|---|
| Female | 178 | 111.83 (12.1) | 42.83 (19.20) | 6 | A | 151 | R |
| 18 | B | 12 | L | ||||
| 9 | H | 13 | Mixed | ||||
| 141 | W | 2 | Unk. | ||||
| 4 | O | ||||||
|
| |||||||
| Male | 209 | 114.32 (13.24) | 39.7 (18.15) | 6 | A | 187 | R |
| 13 | B | 12 | L | ||||
| 4 | H | 9 | Mixed | ||||
| 180 | W | 1 | Unk. | ||||
| 6 | O | ||||||
|
| |||||||
| Total | 387 | 113.20 (12.79) | 41.13 (18.68) | 12 | A | 338 | R |
| 31 | B | 24 | L | ||||
| 13 | H | 22 | Mixed | ||||
| 321 | W | 3 | Unk. | ||||
| 10 | O | ||||||
*
Socioeconomic status (SES) assessed using the Hollingshead scale(REF), which ranges from 20 (highest SES) to 134 (lowest SES).
**
Ethnic groups: A = Asian, B = Black, H = Hispanic, W = White, O = Other