Which of the following is NOT a clinical feature of post - traumatic stress disorder (PTSD)?

Clinical features of PTS : Hyperarousal : Anxiety, irritability, insomnia, poor concentration, hypervigilance. Intrusions : Re-experience of a traumatic event in distressing thought, or dream (nightmares), flashbacks. Avoidance : Avoidance of stimulus (thoughts, activities) that arouse recollection of trauma. Other : Emotional numbing, emotional detachment, the absence of emotional responsiveness (anhedonia), derealization, depersonalization, depression & hopelessness, guilt or shame or self - blame, dissociative amnesa.