The first day of class, Corey is assigned to sit next to a man wearing athletic pants and a baseball cap with a sports logo of his rival team. Corey has an immediate negative evaluative reaction to his classmate. This is referred to as

an attitude

Explanation:

Attitude: In psychology, the term "attitude" is described as a particular set of an individual's behaviors, emotions, and beliefs with respect to a specific event, object, thing, or person. It is generally considered as a consequence of upbringing or experience and can also possess an important influence on an individual's behavior. It is an attitude that tends to characterize a person and is acquired through a person's experience with different things.

In the question above, the given statement is referred to as an attitude.