Question

You hear someone cursing at a cashier in the store. You think, "Wow, what a mean temper!" Which of the following concepts best explains your initial judgment?
cognitive dissonance
fundamental attribution error
foot-in-the-door phenomenon
obedience

Answer 1

This is more likely to be due to cognitive dissonance; the state of having thoughts, beliefs, or attitudes that are inconsistent, especially in the sense of relating to behavioral attitude change and decisions. 

Answer 2

Congnitive dissonance