Following exposure to a traumatic event, a simple computer game may keep individuals from developing a fear association, which could significantly reduce their risk of post traumatic stress disorder, according to a new study from Oxford University researchers.

After exposing study participants to a number of traumatic images, the researchers found that individuals were less likely to develop strong memories associated with these images if they played the game Tetris soon after viewing the images.

The researchers tested the effect with other computer games. However, Tetris was the only one that showed positive results. Additionally, a common word-based quiz game actually had the effect of worsening flashback to the traumatic images.

In the report, which was published in the journal PLoS ONE, the study's authors speculate that focusing on the different shaped moving blocks immediately after trauma competes with thoughts of the experience. This interferes with the formation of memories associated with the event.

The researchers added that, while their findings are still in an early stage, they provide an improved understanding of how negative memories are formed, and could lead to improved treatments for individuals who have suffered traumatic events.