Table 5.
Stepwise multiple regression results for Executive Function model.
| Variables | INI β (SE) |
Group x INI β (SE) |
20Q β (SE) |
Group x 20Q β (SE) |
Final Model β (SE)a |
|---|---|---|---|---|---|
| Group | 23.583** (1.698) | 23.595** (1.702) | 24.323** (1.647) | 24.474** (1.643) | 23.017** (1.688) |
| INI | 0.947** (0.209) | 0.897** (0.299) | 0.820** (0.218) | ||
| 20Q | 1.002** (0.242) | 0.494 (0.372) | 0.070 (0.383) | ||
| Group x INI | 0.098 (0.419) | ||||
| Group x 20Q | 0.875* (0.488) | 1.001** (0.490) | |||
| Constant | 78.016** (1.204) | 77.947** (1.242) | 77.452** (1.190) | 77.087** (1.202) | 77.991** (1.206) |
| R2 | .504** | .504** | .488** | .493** | .720** |
Note:
p<.08,
p<.05. Results presented are from stepwise multiple regression analyses investigating the relation between executive function variables and communication ability. Higher order terms (i.e., interactions) were evaluated first, with non-significant terms removed to maintain parsimony. Group included alcohol-exposed (AE) and typically-developing control (CON) subjects. Inhibition (INI) was measured by Total Errors scaled score from the NEPSY-II; Twenty Questions (20Q) was measured by Initial Abstraction scaled score from the Delis-Kaplan Executive Function System (D-KEFS). The dependent variable, communication, was measured by the Vineland Adaptive Behavior Scales – Second Edition (VABS-II) Communication domain standard score.
The final model consisted of INI main effect and Group x 20Q interaction effect.