Appendix C.
Results of Checking for Carry-Over Effects
| Risk-averse passenger condition |
Risk-accepting passenger condition |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solo then passenger |
Passenger then solo |
t | p | Solo then passenger | Passenger then solo | t | p | |||||||||
| N | M | SD | N | M | SD | N | M | SD | N | M | SD | |||||
| Percent failed to stop | 32 | 16.32 | 17.51 | 30 | 25.93 | 20.96 | –1.41 | .17 | 26 | 27.99 | 20.87 | 28 | 40.25 | 24.08 | –1.57 | .13 |
| Average percent time in red | 16 | 11.45 | 10.64 | 15 | 18.34 | 14.02 | –1.55 | .13 | 13 | 19.21 | 13.32 | 14 | 29.03 | 17.37 | –1.64 | .11 |
Note.
Percent Failed to Stop = (# intersections of Failed to Stop/# of 18 intersections) × 100; Percent Time in Red = (time in intersections during the red light phase/total time in all 18 intersections) × 100; Average percent Time in Red = averaged percent time in red of first and second drives. A t-test was used for percent Time in Red and GLIMMIX model was used for Failed to Stop to compare the difference between Solo then Passenger and Passenger then Solo orders by passenger type.