Table 6.
Population (Weighted) and Reader/Intervention Group Estimates of Maze Growth Parameters
| Growth Parameters | Familiar
|
Novel
|
Practice Effect
|
|||
|---|---|---|---|---|---|---|
| M | SE | M | SE | M | SE | |
| Weighted population estimates | ||||||
| Fixed effects | ||||||
| Mean intercept | 17.48 | 0.38 | 18.82 | 0.36 | ||
| Mean slope | 0.40 | 0.01 | 0.18 | 0.01 | 0.22 | 0.02 |
| Random effects | ||||||
| Intercept variance | 85.65 | 5.18 | 67.38 | 4.72 | ||
| Slope variance | 0.05 | 0.004 | 0.02 | 0.004 | ||
| Intercept/slope covariance | 1.14 | 0.11 | 0.48 | 0.10 | ||
| Error variances | ||||||
| Wave 1 | 11.29 | 1.20 | 30.72 | 2.38 | ||
| Wave 2 | 15.23 | 1.10 | 23.31 | 1.69 | ||
| Wave 3 | 18.40 | 1.28 | 28.96 | 1.98 | ||
| Wave 4 | 23.13 | 1.68 | 30.04 | 2.17 | ||
| Wave 5 | 24.85 | 2.10 | 34.38 | 2.77 | ||
| Reader/intervention group estimates | ||||||
| Mean intercepts | ||||||
| Typical | 23.20 | 0.50 | 23.43 | 0.46 | ||
| Struggling–No Intervention | 13.02 | 0.66 | 14.64 | 0.73 | ||
| Struggling–Intervention | 13.55 | 0.55 | 14.47 | 0.52 | ||
| Mean slopes | ||||||
| Typical | 0.51 | 0.02 | 0.22 | 0.02 | 0.28 | 0.02 |
| Struggling–No intervention | 0.29 | 0.02 | 0.16 | 0.02 | 0.13 | 0.03 |
| Struggling–Intervention | 0.34 | 0.02 | 0.13 | 0.02 | 0.20 | 0.02 |
Note. Population estimates are weighted based on population proportions of Typical and Struggling students. All estimates based on multilevel growth modeling. Slope units are number of words correctly identified per week.