Rosen and Mayers discuss some of the more recent literature dealing with abreaction and present successful and unsuccessful cases illustrating the various types of abreactive reactions. They believe that hypnosis is the method of choice over the barbiturates, ether, etc. They feel that abreactive therapy is an important initial step in the treatment, but must be used in conjunction with deeper psychotherapy. Finally, they suggest that it may be utilized for the differential diagnosis of the psychoses from the neuroses.