Earlier quoted context omitted.
And there's a big difference between suffering from intrusive thoughts about a traumatic experience, and talking about that experience voluntarily. The former is stressful; the latter is therapeutic.
I guess my skepticism of this is a bit unpopular - but the way they measured intrusive thoughts is whether or not the people mentioned the traumatic film they saw in a journal for a week. It seems plausible to that thinking (even if involuntary) about any other traumatic memory may result in short term stress but in the long run help you process it and be healthy? Like in my own experience thinking about something a…
That's a fair criticism. Doing research on real PTSD is tough -- everyone's experience is a little different, and is colored by their personal history -- and it'd be wildly unethical to put test subjects through an in-person experience stressful enough to induce lasting PTSD. Some studies, like the Tetris intervention one I linked elsewhere [1], used real trauma patients; others, like this one, have to rely on stress simulants like a violent film.
I will note, however, that Irréversible [2] -- the film this study used excerpts from -- is exceptionally violent. It's not a run-of-the-mill action film. One of the scenes the study probably used graphically depicts a man being beaten to death with a fire extinguisher.
[1]: https://www.psych.ox.ac.uk/news/tetris-used-to-prevent-post-...