The aspect of adolescent egocentrism that Juanita is experiencing is imaginary audience due to her bad hair day.
Adolescent egocentrism refers to adolescents' predisposition to have conflicting impressions of what others think of them and what others truly think of them.
Adolescents frequently believe that others are more alert and attentive to their conduct and looks than they actually are.
The imaginary audience is a psychological condition in which a person imagines and perceives that a large number of others are actively listening to or watching them.
This made Juanita feels she will experience a bad day if she goes to school with her bad hair.
Learn more about adolescent egocentrism here:
https://brainly.com/question/7274104