The two officers saw their cortisol levels climb steadily until the day of the expected attack and then diminish as it failed to materialize. Among the enlisted men, however, the stress levels were exactly the opposite: their cortisol levels dropped as the attack drew near, and then started to rise when it became clear that they weren’t going to get hit. The only explanation the researchers could come up with was that the soldiers had such strong psychological defenses that the attack created a sense of “euphoric expectancy” among them. “The members of this Special Forces team demonstrated an
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