Study of the Effect of Imagery Rehearsal Therapy (IRT) of Nightmares

"Imagery Rehearsal Therapy is given by psychologists, psychotherapists or psychiatrists. The IRT therapists are all trained by Annette van Schagen, principal investigator.~IRT consists of six 1-hour sessions. The six sessions are given in a period of three months. Each session is described in the IRT Manual. The IRT Manual is devised by the principal investigator Annette van Schagen in colaboration with Victor Spoormaker PhD. There is a patient version of the IRT manual available for the patients, which includes descriptions of the IRT sessions and homework assignments."