Table 2.
Longitudinal Change in WIAT Academic Scores
| WIAT Measure | No. | Baseline (intercept)*
|
Slope†
|
||||
|---|---|---|---|---|---|---|---|
| Estimate | SE | P | Estimate | SE | P | ||
| Reading | 87 | 100.14 | 1.49 | .93 | −0.064 | 0.028 | .026‡ |
| Math | 86 | 97.35 | 1.68 | .12 | 0.037 | 0.030 | .228 |
| Spelling | 86 | 99.18 | 1.63 | .62 | −0.043 | 0.029 | .147 |
Abbreviation: WIAT, Wechsler Individual Achievement Test.
*
Intercept scores represent academic performance at CRT baseline. Scores are reported as standard scores, which have a mean of 100 and standard deviation of 15. None of the baseline scores differ significantly from 100.
†
The slope represents change in academic performance in standard points per month.
‡
P < .05.