The Narrator from the Story "Sixteen" is using a rhetorical appeal called Ethos, where the presenter of the idea tries to convince the audience that he or she is qualified on the subject or matter of discussion
Just as reference I present the different Rhetorical Appeals. They are maneuvers in rhetoric that classify the speaker's appeal to the audience. The Rhetorical Appeals are:
Ethos: It is how well the presenter convinces the audience that the presenter is qualified to speak on the subject, and by doing that what the presenter says is valid.
Pathos: is an appeal to the audience’s emotions
Logos: it. It is normally used to describe facts and figures that support the speaker's claims or thesis.
Kairos: An orator uses this to their advantage to persuade the audience to act now at the time being
The effect that the narrator's insistence that she is experienced causes the reader to think that:
It makes the reader understand that the narrator has a great deal of life experience.