Notice you said "acted up". That's how I was raised to call misbehaving.
Where did this "acted out" come from. I hear that everywhere now.
We say "show out," as in, "Spolled brat showing out."
That is a psychologism. There is no such thing as a real emotion or sincere anything. We are always "acting" in "roles" to the psychologist and, by extension, to liberals. Those folks think they are tho only ones who understand anything. Some of them think that therefore they are not acting. Others believe since its all acting then all they have to do to install utopia is change everybody's script.