Abstract: A training system includes a computer system, a display system and a motion capture device. During use the training system presents a computer simulation of a virtual subject capable of exhibiting nystagmus to a trainee. The movements of the trainee are captured using the computer system during the administration of an HGN test to the virtual subject. During the administration of the HGN test to the virtual subject, the training system simulates nystagmus in the virtual subject.