Evaluation of ERP Polygraph Technology in Hidden Information Based on P300 and CNV with BP Neural Network

In recent years, legal society has become the mainstream in development of the times. It requires evidence of a crime in any case, whereby the testimony of criminals become more important. However, the effectiveness of testimony becomes concerned issue. ERP hidden information polygraph technology, as a new type of technology, is particularly important in case management. In this paper, P300 and CNV indicators were studied with AHP, selecting a suitable indicator used in crimes of theft. Based on BP neural network model, comparative experiment as a reference, both from the tester's reaction time and waveform amplitude, evaluation model was established to provide a theoretical basis for the future.