A
system and method for knowledge
verification utilizing biopotentials and physiologic
metrics, which includes a computer-based device having stored thereon Probe, Relevant and Gallery image data, and a biopotential
amplifier removably connected to a human subject via disposable Ag / Ag—Cl electrodes. Furthermore, the
system comprises an analog-to-digital (A / D) converter to digitize said biopotential data for subsequent storage on said computer-based device,
analysis software for discriminating said subject's event-related response to the exogenous stimuli, a visual display
system comprising an LCD video monitor, and
control software for presenting the Probe, Relevant and Gallery visual stimuli in a weighted, pseudo-
random sequence which can be modulated by the outcome of said
analysis software. Probe image data are not generally known to said human subjects but relevant to the knowledge to be verified; Relevant image data are generally known to said human subjects but not relevant to the knowledge to be verified; and Gallery image data are not generally known to said human subjects and not relevant to the knowledge to be verified. Said knowledge
verification system can utilize parametric or non-parametric, e.g., artificial neural networks, analysis to provide an output of
verification, or non-verification of knowledge of interest. Exemplary headband and
electrode configurations optimized to produce the desired signals are disclosed.