A disorder resulting from exposure to a major stressor, with symptoms of anxiety, nightmares, poor sleep, reliving the event, and concentration problems, lasting for more than 1 month, is called __________.

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Posttraumatic stress disorder (PTSD) is the disorder resulting from exposure to a major stressor, with symptoms of anxiety, nightmares, poor sleep, reliving the event, and concentration problems, lasting for more than 1 month. Acute stress disorder (choice A) is a similar disorder but with symptoms lasting less than a month. External locus of control (choice B) refers to a personality trait characterized by the belief that one's life is primarily controlled by external factors rather than by oneself. Catastrophic stress (choice C) is not a recognized term in psychology or psychiatry.

A Disorder Resulting from Exposure to a Major Stressor, with Symptoms