What is the term used to describe an attitude that exaggerates the virtues of a group, such as all Asian Americans being brilliant or all African Americans being great athletes?

Positive prejudice

Explanation:

Prejudice: The term prejudice is defined as an individual's incorrect or unjustified attitude towards the other person based on his or her membership in a particular group.

Positive prejudice: In sociology, the term positive prejudice is defined as the phenomenon in which an individual carries positive feelings and reactions towards a group. An individual carrying positive prejudice towards the other person encompasses positive emotional responses and beliefs.

In the question above, the given statement signifies positive prejudice.