From the New Yorker, of all places:
Because trigger warnings involve assumptions about emotional reactions, particularly with respect to P.T.S.D., psychology researchers have begun to study whether trigger warnings are in fact beneficial. The results of around a dozen psychological studies, published between 2018 and 2021, are remarkably consistent, and they differ from conventional wisdom: they find that trigger warnings do not seem to lessen negative reactions to disturbing material in students, trauma survivors, or those diagnosed with P.T.S.D. Indeed, some studies suggest that the opposite may be true. [...] Yet another study suggested that trigger warnings may prolong the distress of negative memories. A large study by Jones, Bellet, and McNally found that trigger warnings reinforced the belief on the part of trauma survivors that trauma was central (rather than incidental or peripheral) to their identity. The reason that effect may be concerning is that trauma researchers have previously established that a belief that trauma is central to one’s identity predicts more severe P.T.S.D.; Bellet called this “one of the most well documented relationships in traumatology.” The perverse consequence of trigger warnings, then, may be to harm the people they are intended to protect.
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