When Samantha travels south from her hometown in Philadelphia, she often takes on a Southern accent and uses words and phrases unique to the south when speaking with others. This is an example of the

Chameleon Effect

Explanation:

The Chameleon effect is the  change of behavior depending on the environment around the person.

Since Samantha is using  words and phrases unique to the south while speaking with others, she is adapting her behavior to her surroundings and social environment.

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answer:

i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket.   your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing).   good luck!   i hope you do well!