Table 2.
Unconditional Growth Models for Achievement and Social Skills across Elementary School
| Individual Growth Curve Parameters | Individual Growth Curve Variance Components | ||||
|---|---|---|---|---|---|
| | |||||
| Average scorea (SE) | Ageb (SE) | Residual Variance | Intercept Variance (df = 1363) | Slope Variance (df = 1363) | |
| Reading | 485.02*** (0.57) | 1.20*** (0.01) | 152.59 | 293.88*** | 0.02 |
| Math | 492.09*** (0.38) | 0.84*** (0.01) | 72.15 | 125.17*** | 0.00 |
| Vocabulary | 495.17*** (0.30) | 0.46*** (0.01) | 33.33 | 104.00*** | 0.01*** |
| Teacher-report SSRSc | 102.93*** (0.35) | 0.01 (0.01) | 124.25 | 76.60*** | |
| Mother-report SSRS | 106.14*** (0.39) | -0.05*** (0.01) | 63.41 | 166.86*** | 0.02*** |
| Teacher-report CBCLc | 50.54*** (0.22) | 0.01 (0.01) | 53.92 | 39.21*** | |
| Mother-report CBCL | 47.53*** (0.27) | -0.04*** (0.00) | 25.25 | 79.81*** | 0.01*** |
Note. Significance levels denoted on the intercept and slope variance components reflect whether there were significant individual differences across individual intercepts and slopes.
a
Intercept
b
Slope, rate of change across 1st, 3rd and 5th grade.
c
Non-random Level-1 coefficient
***
p < .001.