Answer:
fundamental attribution error
Step-by-step explanation:
Fundamental attribution error: In psychology, the term "fundamental attribution error" is determined as a person's propensity to describe the other person's behavior on the basis of some internal factor, for example, his or her personality and therefore underestimates the external factors' influences, for example, situational influences that can have on another individual's behavior.
In the question above, Matt’s neighbor is demonstrating the concept of the fundamental attribution error.