CBTraining has been applied to symptoms of post-traumatic stress disorder in one study by showing participants traumatizing video clips and then having them play a game of Tetris for a specific amount of time. The study was designed to replace the act of recalling a traumatic memory, which is a visuospatial memory process, with another visuospatial activity within the desired time window in order to disrupt the brain's ability to solidify the original memory. Minimal results were reported.