Basically, having to take the sad walk through the first class cabin -- usually while the passengers already seated there are being served beverages -- rubs what the researchers describe as your “relatively disadvantaged status" in your stupid plebe face, which doesn't make you feel very great now, does it? On the flip side, first class passengers were more likely be frustrated and aggressive when other passengers boarded through their cabin instead of via a separate entrance (and when the hell does that happen?).
"Psychology (research) tells us that when people feel a sense of deprivation and inequality, they are more likely to act out," Katherine DeCelles, associate professor of organizational behavior at the University of Toronto, told CNN. Conversely, she explained, "When people from higher social class backgrounds are more aware of their higher status, they are more likely to be antisocial, to have entitled attitudes and to be less compassionate."