The behaviour of drivers has been used to claim that people of a higher social class are more unpleasant (Piff et al., 2012). Piff and colleagues classified social class by the type of car (vehicle) on a five-point scale and observed whether the drivers cut in front of other cars at a busy intersection (vehicle_cut). Do a logistic regression to see whether social class predicts whether a driver cut in front of other vehicles (piff_2012_ vehicle.sav).¹⁹