Table II. Demographic Data on Study Sample.
| Boys n = 103 |
Girls n = 106 |
Total group n = 209 |
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|---|---|---|---|---|---|---|
| Mean | (SD) | Mean | (SD) | Mean | (SD) | |
| Parent education levela | 5.24 | (0.98) | 5.19 | (1.04) | 5.21 | (1.01) |
| Full Scale I.Q.b | 108.02 | (14.83) | 110.41 | (12.82) | 109.23 | (13.87) |
| Age (years) at time of testing: | ||||||
| Kindergarten | 5.86 | (0.34) | 5.72 | (0.33) | 5.79 | (0.34) |
| Grade 1 | 6.84 | (0.34) | 6.69 | (0.31) | 6.77 | (0.33) |
| Grade 2 | 7.85 | (0.34) | 7.70 | (0.31) | 7.77 | (0.34) |
| Grade 3 | 8.72 | (0.30) | 8.60 | (0.31) | 8.66 | (0.31) |
a
Parent education level was coded as follows: 4 = completed grade 12; 5 = completed 1 to 3 years of college; 6 = completed 4 year college; 7 = University /graduate school. Data were available for parents of 202 of the 209 participants; using the most recent information available. Mother's education level was used except for one household headed by a single-parent father.
b
Based on all four subtests of the Wechsler Abbreviated Scale of Intelligence (WASI), administered one time (Year 04), except for one child whose score was based on 2 subtests of the WASI administered in Year 03.