A computer system provides a series of visual flash stimuli to a user and then requires that the user process the visual stimuli to produce a verbalization that corresponds to the visual stimuli and/or a fine motor activity that corresponds to the visual stimuli. The visual flash stimuli are presented to a user via a display device and include letters, words and phrases. The fine motor activity includes inputting letters or words via an input device, such as typing on a keyboard. The system includes eye movement activities, letter flash activities and word flash activities. The content or visual stimuli provided during these activities, as well as the progression through these activities can be determined in part by the diagnosis of the individual user. The system can be used to treat a variety of mental disabilities.