1. A method of determining the probability of explosive behavior in a person of known age, sex and use of medication, using an electroencephalographic machine operable for reading human brain waves and generating an output, a computer operable for receiving the output of said electroencephalographic machine, a device operable to display a paradigm of a pre-selected design, illumination, and frequency, said computer also capable of synchronizing the recording and averaging said brain waves when the paradigm is illuminated, which comprises: attaching electrodes of an electroencephalographic machine to the scalp of said person in accordance with the American Electroencephalographic Society's Electrode Placement International 10-20 Standard System for measuring a person's brain waves; positioning said person to view a paradigm to visually evoke a potential in said person's brain; displaying to said person a plurality of sequentially displayed paradigms and simultaneously measuring the brain waves of said person for each of the displayed paradigms during the time of display; averaging said brain waves to determine the visually evoked potential to said displays of said paradigms; measuring the maximum amplitude, in microvolts, of said visually evoked potential at a point in time approximately 100 msec. after termination of each of the displays of said paradigms; conducting and recording the quantitative electroencephalographic activity of said person; measuring the amplitude of said quantitative electroencephalographic activity; conducting a logistic regression analysis of said visually evoked potential at approximately 100 msec. after termination of each of said displays of said paradigm, said electroencephalographic activity, and said person's age, sex, and whether said person is taking medication, to establish a predictive algorithm; and computing the probability of explosive behavior using said algorithm.