1. Repeated, disturbing dreams of the stressful experience?

2. Repeated, disturbing memories of the stressful experience?

3. Suddenly feeling as though the stressful experience were happening again (as if you were reliving it)?

4. Feeling very upset when something reminded you of the stressful experience?

5. Having physical reactions (e.g., heart pounding, trouble breathing, sweating) when something reminded you of the stressful experience?

6. Avoiding memories, thoughts, or feelings about the stressful experience?

7. Avoiding external reminders (people, places, conversations, activities, objects, or situations) that remind you of the stressful experience?

8. Trouble remembering important parts of the stressful experience?

9. Having strong negative beliefs about yourself, other people, or the world (e.g., “I am bad,” “No one can be trusted”)?

10. Blaming yourself or someone else for the stressful experience or what happened because of it?

11. Feeling negative emotions such as fear, horror, anger, guilt, or shame?

12. Loss of interest in activities that you used to enjoy?

13. Feeling distant or cut off from other people?

14. Being unable to feel positive emotions?

15. Feeling irritable or easily angered?

16. Taking too many risks or doing things that could cause you harm?

17. Being overly alert or watchful?

18. Feeling jumpy or easily startled?

19. Having trouble concentrating?

20. Having trouble falling or staying asleep?