The movement to recognize complex PTSD has been criticized for approaching the process of diagnostic validation backwards. The typical process for validation of new disorders is to first publish case studies of individual patients who manifest all of these issues and clearly demonstrate how they are different from patients who experienced different types of traumas. There are no known case reports with prospective repeated assessments to clearly demonstrate that the alleged symptoms followed the adverse events. Then the next step would be to conduct well-designed group studies. Instead, supporters of complex PTSD have pushed for recognition of a disorder before conducting any of the prospective repeated assessments that are needed.