Although the field of psychology currently recommends trauma-focused cognitive behavioral therapy for early psychological intervention for acute traumatic stress, additional research is required for safe and efficient psychotherapy that can delivered to a broader population and within a brief period of time. Methods: This pilot study examined the safety and feasibility of a single-session group stabilization intervention for individuals conducted at an average of two weeks after various types

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... traumatic events. Further development of DSM-5 mental disorders, such as post-traumatic stress disorder (PTSD) and others, was assessed at the six-month follow-up. A total of 38 participants with acute stress symptoms participated in a single-session 90-minute group psychotherapy, which consists of psychoeducation; identification of and coping with triggers; somatosensory grounding; and containment exercise. Results: After six months, follow-up was conducted on 34 (89.5%) patients, who completed the Structured Clinical Interview for DSM-5 Mental Disorders and the PTSD Checklist-5. One (2.9%) participant met the current diagnosis of PTSD, whereas none met any other psychiatric diagnoses. A significant decrease was noted in PTSD scores between baseline and follow-up (t=7.4, df=33, p<0.001, Cohen's d=1.27) measured using the PTSD Checklist-5. Conclusion: The finding suggests that a single stabilization session can be used in a safe and efficient manner at of the acute stage of trauma.