An adolescent is certain that everyone in the restaurant is acutely aware of the blemish...

This scenario illustrates egocentricity, specifically the concept of the "imaginary audience," which is common in adolescence. Adolescents often believe that others are highly attentive to their appearance and behavior. According to Piaget, egocentrism in this stage leads teens to overestimate the degree to which they are the focus of others’ attention. “Egocentricity in adolescence results in the belief that others are as concerned with one’s appearance and behavior as oneself.”