Reversal theory
Reversal theory is a theory of personality, motivation and emotion in the field of psychology. It focuses on the dynamic qualities of normal human experience to describe how a person regularly reverses between psychological states, reflecting their motivational style and the meaning they attach to a given situation at a given time. For example, sometimes a roller coaster seems exciting; other times, it may cause anxiety. Sometimes a crying baby creates sympathy; other times it causes irritation.