A disorder in which stress-related symptoms appear months or years after a traumatic event and persist for months or even years is called ______.

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Posttraumatic stress disorder (PTSD) is a disorder in which stress-related symptoms (such as intrusive thoughts, avoidance of reminders of the traumatic event, negative mood and cognition, and hyperarousal) appear months or years after a traumatic event and persist for months or even years. Acute stress disorder is a similar disorder, but symptoms appear within a month of the traumatic event and last for less than a month. A reaction formation is a defense mechanism in which a person expresses the opposite of what they actually feel (e.g., being overly nice to someone they dislike). Conversion disorder is a disorder that involves physical symptoms without a medical explanation (e.g., blindness or paralysis with no apparent physical cause).

A Disorder in Which Stress-Related Symptoms Appear Months or Years