Abstract: Latency and amplitude figures for waveforms were picked at their point of maximal deflection as seen at their electrode site of maximal voltage distribution. The foregoing procedure for peak-picking was usually rather simple and straightforward for the early peaks. However for the Late Positive Complex (LPC) components due to their inherent but limited morphological identification had to be used in order not to confuse and admix together different LPC components from different subjects. Basically it is assumed that there are a maximum of three components in a person’s LPC which we call P3a, P300 and P3b. P3a is the earliest and P3b the latest such component while P300 falls somewhere in the middle usually assumed as the waveform’s center of gravity where a distinct peak cannot be ascertained. The range of LPC morphological variability which is seen in a general population including both healthy and sick people is then considered to represent a kind of gradient of LPC degeneration or deterioration and can be classified as such.