(CNN) The science is looking pretty unanimous on this one: Drivers of expensive cars are the worst.

A new study has found that drivers of flashy vehicles are less likely to stop and allow pedestrians to cross the road -- with the likelihood they'll slow down decreasing by 3% for every extra $1,000 that their vehicle is worth.

Researchers from the University of Nevada, Las Vegas speculated that the expensive car owners "felt a sense of superiority over other road users" and were less able to empathize with lowly sidewalk-dwellers.

They came to this conclusion after asking volunteers to cross a sidewalk hundreds of times, filming and analyzing the responses by car drivers.

Researchers used one white and one black man, and one white and one black woman -- also finding that cars were more likely to yield for the white and female participants. Vehicles stopped 31% of the time for both women and white participants, compared with 24% of the time for men and 25% of the time for black volunteers.