This post is copied and pasted from Things Are Good:
Playing games is tons of fun and enterprising people are finding ways to better humanity through gameplay. I just found out that Tetris can be used to help people deal with traumatic experiences – cool!
Research tells us that there is a period of up to six hours after the trauma in which it is possible to interfere with the way that these traumatic memories are formed in the mind. During this time-frame, certain tasks can compete with the same brain channels that are needed to form the memory. This is because there are limits to our abilities in each channel: for example, it is difficult to hold a conversation while doing maths problems.
The Oxford team reasoned that recognising the shapes and moving the coloured building blocks around in Tetris competes with the images of trauma in the perceptual information channel. Consequently, the images of trauma (the flashbacks) are reduced. The team believe that this is not a simple case of distracting the mind with a computer game, as answering general knowledge questions in the Pub Quiz game increased flashbacks. The researchers believe that this verbal based game competes with remembering the contextual meaning of the trauma, so the visual memories in the perceptual channel are reinforced and the flashbacks are increased.