Table 2.
MANOVA and ANOVA results for the DSI and the DBQ.
| Variable | Wilks’ lambda | F | df | η 2 |
|---|---|---|---|---|
| MANOVA: Perceptual-motor skills and safety skills (DSI) | ||||
| Age | 0.95 | 3.34*** | 14,1810 | 0.03 |
| Sex | 0.94 | 30.71*** | 2,905 | 0.06 |
| Mileage | 0.89 | 26.40*** | 4,1810 | 0.06 |
| Age × Sex | 0.97 | 1.77* | 14,1810 | 0.01 |
| Age × Mileage | 0.95 | 1.63* | 28,1810 | 0.03 |
| Age × Sex × Mileage | 0.96 | 1.60* | 26,1810 | 0.02 |
| ANOVA: safety orientation | ||||
| Sex | – | 40.10*** | 1,906 | 0.04 |
| Age | – | 5.13*** | 7,906 | 0.04 |
| Mileage | – | 46.49*** | 2,906 | 0.09 |
| MANOVA: Aberrant driving behaviour (DBQ) | ||||
| Sex | 0.97 | 6.55*** | 4,904 | 0.03 |
| Mileage | 0.96 | 4.75*** | 8,1808 | 0.02 |
| Age × Mileage | 0.92 | 1.44* | 56,3519 | 0.02 |
| ANOVA: Ordinary violations (DBQ) | ||||
| Sex | – | 9.24** | 1,907 | 0.01 |
| Mileage | – | 12.35*** | 2,907 | 0.03 |
| Age × Mileage | – | 1.95* | 14,907 | 0.03 |
| ANOVA: Aggressive violations (DBQ) | ||||
| Mileage | – | 11.40*** | 2,907 | 0.03 |
| ANOVA: Lapses (DBQ) | ||||
| Sex | – | 5.55* | 1,907 | 0.01 |
| Age × Mileage | – | 1.80* | 14,907 | 0.03 |
Effects tested were Age; Sex; Mileage; Age × Sex; Age × Mileage; Sex × Mileage; and Age × Sex × Mileage.
*
p < 0.05;
**
p < 0.01;
***
p < 0.001.