Performance testing and/or training

The visual and/or visualization skills of a subject may be tested and/or trained using systems and methods in accordance with the present invention. Visual stimuli may be presented to a test subject. Measurements relating to the performance of the subject, such as stability information, eye movement data, physiological information, or other information, may be made both with and without visual stimuli being provided to a subject. Similar measurements may be made while the subject visualizes the visual stimuli, and the collected data may be compared to evaluate the subject's ability to visualize visual stimuli. Secondary stimuli may also be provided to subject as part of this process, or mental activities may be required by subject as well.