George Kelly was a psychotherapist who devised more than one therapeutic techniques, one of which was very popular, the fixed role therapy. In this therapy the psychotherapist asks the client to write about his own character which is called the self-characterization. The person describes his or her own character in writing. The client will describe his or her character and the responses that he can make in different situations. The next step is cooperative, where the client and the therapist work together and they formulate a personality character which the client perceives as ideal. The client then has to play that role in front of the therapist.