Traumatic Brain Injuries (TBI) can result in physical, cognitive and emotional symptoms and the constellation of sequelae that can linger for years and is termed post-concussion syndrome (PCS). For these ailments, therapy is available to help individuals recover; however, it is controversial whether cognitive rehabilitation can improve or forestall lost or damaged abilities. It is important to clarify this because insurances companies can be reluctant to pay for this treatment. To test the efficacy of cognitive rehabilitation, 6 women with mild traumatic brain injury consented to participate in this experiment. Each person was administered attention processing training, number search, visual memory and find the shape tasks, over a period of 4.4-6.8 months and the latencies and accuracies for each participant on each trial was measured. There was a significant reduction in latencies and improvements in accuracy from before training to after training with an effect size of greater than 2.0. Together, these data show that 6 months of cognitive rehabilitation significantly and robustly improved performance in all patients.