Final answer:
The term for the belief, reflecting adolescents' egocentrism, that others are as interested in them as they themselves are, as well as attention-getting behavior, is Imaginary audience.
Step-by-step explanation:
The term for the belief, reflecting adolescents' egocentrism, that others are as interested in them as they themselves are, as well as attention-getting behavior is a) Imaginary audience. This concept is part of Goffman's dramaturgy ideas and expands on Charles Cooley's concept of the looking-glass self. According to Cooley, we base our image on what we think other people see and we imagine how we must appear to others and react to this speculation.