Although frieda is typically very reserved, as part of a huge rock concert crowd she lost her inhibitions and behaved in a very sexually provocative way. frieda's unusual behavior is best understood in terms of

Voices in her head telling her TV is spying on her

Remains motionless in her chair for hours and when she does get out of her chair for hours, she poses like a statue in the town square

Explanation: They all constitute mental, relation, thought and emotion disorder. The above statements are positive signs of schizophrenia