Group therapy with parents has also proved helpful. In the permissive atmosphere created by the therapist, parents bring their feelings out into the open, and gain understanding of themselves and of problems common to early childhood. One pediatrician found mixed groups of fathers and mothers more responsive than groups of mothers alone.
The method was styled "conversion therapy" because the moderate LET neutrons are converted to high LET alpha and triton particles. (Triton particles are the nucleus of hydrogen-3.) Yet another approach, neutron-capture therapy, utilizes boron-10 or uranium-235 for neutron capture entirely within the neoplasm (new growth). Both capture and conversion therapy came closer to trial with the solution of the fundamental physical problem of delivering neutrons of the proper energy to the diseased area.
Moreno brought his method rica, where it is now widely used, udian methods have also been used in group therapy with neurotics and mildly schizophrenic patients. The greatest impetus to the growth of group therapy came during World War II, when psychiatrists and psychologists in the military services turned to group methods because of heavy patient loads and the shortage of trained personnel.