Table 2. Results for Mixed Models Predicting Growth in 6th-9th Academic Achievement.
| Model NO1 | Model NO2 | Model WR1 | Model WR2 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate | SE | p | Estimate | SE | p | Estimate | SE | p | Estimate | SE | p | |
| Intercept | 37.81 | 0.79 | < .0001 | 36.93 | 0.64 | < .0001 | 119.18 | 0.74 | < .0001 | 118.06 | 0.42 | < .0001 |
| Grade | 2.60 | 0.22 | < .0001 | 2.65 | 0.22 | < .0001 | 2.54 | 0.16 | < .0001 | 2.62 | 0.15 | < .0001 |
| Sex | -1.68 | 1.16 | 0.1499 | -0.60 | 0.94 | 0.5205 | -0.52 | 1.09 | 0.631 | 0.65 | 0.61 | 0.2883 |
| Sex × Grade | -0.10 | 0.32 | 0.7546 | -0.17 | 0.32 | 0.6064 | 0.08 | 0.24 | 0.7487 | -0.01 | 0.21 | 0.9652 |
| First Grade Predictors of Achievement | ||||||||||||
| Intelligence | 3.10 | 0.70 | < .0001 | 2.32 | 0.57 | < .0001 | 2.99 | 0.64 | < .0001 | 0.90 | 0.39 | 0.0197 |
| In-class attentive behavior | 2.35 | 0.70 | 0.001 | 1.02 | 0.59 | 0.0854 | 0.00 | 0.66 | 0.9973 | 0.21 | 0.37 | 0.5698 |
| 1st grade CE | 0.46 | 0.79 | 0.5571 | -0.57 | 0.64 | 0.3799 | 1.06 | 0.73 | 0.1477 | 0.56 | 0.41 | 0.1734 |
| 1st grade PM | 0.19 | 0.95 | 0.8417 | 0.22 | 0.76 | 0.7765 | -0.28 | 0.88 | 0.7472 | -0.26 | 0.49 | 0.5952 |
| 1st grade VSM | 0.00 | 0.80 | 0.9961 | -0.02 | 0.64 | 0.9737 | -0.36 | 0.73 | 0.6238 | 0.07 | 0.41 | 0.8566 |
| 1st grade number RT | -0.45 | 0.73 | 0.5401 | -0.33 | 0.59 | 0.5745 | ||||||
| 1st grade letter RT | -1.04 | 0.58 | 0.0756 | -0.04 | 0.33 | 0.9094 | ||||||
| Intelligence × Grade | 0.26 | 0.19 | 0.1789 | 0.31 | 0.20 | 0.1163 | -0.13 | 0.14 | 0.3528 | 0.02 | 0.13 | 0.8754 |
| In-class attentive behavior × Grade | -0.02 | 0.19 | 0.9224 | 0.06 | 0.20 | 0.755 | 0.06 | 0.15 | 0.6751 | 0.05 | 0.13 | 0.7206 |
| 1st grade CE × Grade | -0.28 | 0.22 | 0.1939 | -0.22 | 0.22 | 0.3242 | 0.07 | 0.16 | 0.662 | 0.11 | 0.14 | 0.4509 |
| 1st grade PM × Grade | 0.30 | 0.26 | 0.2469 | 0.30 | 0.26 | 0.2482 | -0.18 | 0.20 | 0.3487 | -0.18 | 0.17 | 0.2821 |
| 1st grade VSM × Grade | 0.01 | 0.22 | 0.9816 | 0.01 | 0.22 | 0.9777 | 0.32 | 0.16 | 0.0485 | 0.29 | 0.14 | 0.0437 |
| 1st grade number RT × Grade | 0.08 | 0.20 | 0.7022 | 0.07 | 0.20 | 0.7292 | ||||||
| 1st grade letter RT × Grade | 0.25 | 0.13 | 0.0555 | 0.17 | 0.12 | 0.133 | ||||||
| Fifith Grade Predictors of Achievement | ||||||||||||
| 5th grade CE | 1.00 | 0.80 | 0.2114 | -0.06 | 0.65 | 0.9303 | 0.03 | 0.74 | 0.9707 | -1.13 | 0.42 | 0.008 |
| 5th grade PM | -0.75 | 0.85 | 0.3799 | -0.01 | 0.69 | 0.9863 | 1.18 | 0.79 | 0.1388 | 0.66 | 0.44 | 0.1378 |
| 5th grade VSM | 1.76 | 0.72 | 0.0156 | 2.16 | 0.58 | 0.0002 | 0.40 | 0.69 | 0.5652 | 0.37 | 0.39 | 0.345 |
| 5th grade number RT | -0.78 | 0.75 | 0.2995 | -1.17 | 0.60 | 0.0525 | ||||||
| 5th grade letter RT | -1.06 | 0.65 | 0.1021 | 0.27 | 0.37 | 0.4682 | ||||||
| 5th grade NO | 4.23 | 0.57 | < .0001 | |||||||||
| 5th grade WR | 6.23 | 0.41 | < .0001 | |||||||||
| 5th grade CE × Grade | -0.03 | 0.22 | 0.8754 | 0.03 | 0.22 | 0.8905 | -0.12 | 0.16 | 0.4794 | -0.03 | 0.15 | 0.8317 |
| 5th grade PM × Grade | -0.07 | 0.24 | 0.7637 | -0.12 | 0.24 | 0.6234 | -0.09 | 0.17 | 0.5958 | -0.06 | 0.15 | 0.7211 |
| 5th grade VSM × Grade | 0.46 | 0.20 | 0.0226 | 0.43 | 0.20 | 0.0312 | -0.13 | 0.15 | 0.3892 | -0.13 | 0.13 | 0.3361 |
| 5th grade number RT × Grade | -0.37 | 0.21 | 0.0795 | -0.34 | 0.21 | 0.102 | ||||||
| 5th grade letter RT × Grade | 0.03 | 0.14 | 0.8312 | -0.07 | 0.13 | 0.6029 | ||||||
| 5th grade NO × Grade | -0.26 | 0.20 | 0.181 | |||||||||
| 5th grade WR × Grade | -0.46 | 0.14 | 0.0017 | |||||||||
| AIC | 2816.5 | 2751.5 | 2462.0 | 2351.7 | ||||||||
CE = Central Executive; VSM = Visuospatial Memory; PM = Phonological Memory; RT = reaction time; NO = Numerical Operations; WR = Word Reading; RT = reaction time.