Table 4.
Summary of Level 2 (Conditional) growth models: Language Group, RT, Accuracy
| Level 2: Conditional | |||
|---|---|---|---|
| Model 4: Group |
Model 5: Group x RT |
Model 6: Group x Accuracy |
|
| Model Fit (-2LL) | 3763.3 | 3744.0 | 3729.0 |
| # of Parameters | 13 | 19 | 19 |
| Fixed Effects | Parameter estimates (se) | ||
| Intercept | 420.5 (23.6)** | 717.3 (99.0)** | −46.0 (132.9) |
| Linear | 55.3 (5.5)** | 91.3 (23.8)** | 14.7 (31.7) |
| Quadratic | 1.8 (0.4)** | 2.7 (1.9) | 1.6 (2.6) |
| Group x Intercept | 148.4 (31.3)** | −36.8 (141.2) | 389.6 (202.5)# |
| Group x Linear | −35.8 (7.3)** | −110.5 (33.9)** | 111.1 (48.3)* |
| Group x Quadratic | −3.3 (0.6)** | −7.4 (2.8)** | 5.4 (4.0) |
| RT x Intercept | -- | −0.4 (0.1)** | -- |
| RT x Linear | -- | −0.04 (0.03) | -- |
| RT x Quad | -- | −0.01 (0.01) | -- |
| RT x Group x Intercept | -- | 0.2 (0.2) | -- |
| RT x Group x Linear | -- | 0.09 (0.04)* | -- |
| RT x Group x Quad | -- | 0.01 (0.01) | -- |
| Accuracy x Intercept | -- | -- | 747.8 (210.2)** |
| Accuracy x Linear | -- | -- | 65.0 (50.1) |
| Accuracy x Quad | -- | -- | 0.2 (4.1) |
| Accuracy x Group x Intercept | -- | -- | −406.3 (311.6) |
| Accuracy x Group x Linear | -- | -- | −226.3 (74.4)** |
| Accuracy x Group x Quad | -- | -- | −13.2 (6.1)* |
| Random Effects | Covariance Estimates (se) | ||
| Within-person | 1937.6 (307.1)** | 1933.3 (306.1)** | 1943.2 (307.8)** |
| Intercept | 17456.3 (3064.8) | 15224.3 (2713.2)** | 14405.4 (2591.2)** |
| Linear | 769.2 (219.1)** | 707.1 (161.1)** | 647.4 (152.5)** |
| Quadratic | 5.0 (1.1)* | 4.8 (1.1)** | 4.3 (1.0)** |
Note: se = standard error; t-statistic,
#
p < .07,
*
p < .05, p < .01;
**
Wald Z: p < .001; Significant effects also indicated in bold.