Stress events that present extraordinary challenges to coping and adaptation; traumatic stressors includes “experiencing, witnessing, or confronting events that involve actual or threatened death or serious injury, or a threat to the physical integrity of self or others.”
Agaibi, C. E., & Wilson, J. P. (2005). Trauma, PTSD, and resilience: A review of the literature. Trauma, Violence, & Abuse, 6(3), 195-216.
American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (DSM-5®). American Psychiatric Pub.