Three Harvard scientists have published a study with the slightly mischievous title “Trigger warning: Empirical evidence ahead.”
The subject of trigger warnings, since they made their appearance on the academic (primarily collegiate) scene, has been vexed with controversy. The warnings were first developed to meet the needs of sufferers from post-traumatic stress disorder (PTSD). If someone with PTSD encounters the wrong stimuli, he or she can relive the original trauma.