Tetris could be a cognitive vaccine for PTSD

Except that PTSD is characterised by intrusive flashbacks with an onset of +30 days. If the flashbacks occur within 30 days of the traumatic event, the disorder is Acute Stress Disorder. So, if the flashbacks are occuring within 4 hours of trauma-inducing footage, the experiments are testing the ability of Tetris to suppress ASD not PTSD.
 
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There are many definitions for PTSD and not just one you mentioned above. I'm pretty sure these people conducting the experiments know a lot more about it than you ;p
 
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