When meredith is with her friends, she is very talkative and outgoing, but when she meets new people, she is often shy and quiet. meredith's behavior is a good example of how makes people difficult to study?

I'm pretty sure your answer should be Reactivity. I hope this helps! =^-^=

The answer is reactivity.   A reactive person is one who waits for things to happen for her to react. These people alter their behavior when they believe they are being observed. Depending on the situation they are in, these changes can be positive or negative.

answer; ethnocentric;

answer; well formed body;