利用相锁值算法的脑电相同步测谎研究

相锁值（Phase Locking Value，PLV）是由相同步的概念下提出一种描述不同信号相关性（同步性）的算法，在脑电信号领域，其有效性已经得到了验证.本文针对当前测谎方法中脑电信号特征提取困难的问题，首次将相锁值的算法应用到脑电测谎领域中，研究谎言脑活动下不同脑区之间的相关性，通过相关性发现谎言的认知机制，并利用该相关性作为特征，使用支持向量机对说谎者和诚实者的两类信号进行模式识别，得到了88.50%的准确率，提出的方法验证了PLV在测谎应用中的有效性，为基于脑电信号的测谎提供了一种新的途径.

Lie Detection Study Based on Phase Locking Value

Phase Locking Value(PLV) is an algorithm describing different signals' correlation (synchronization),which is based on the concept of phase synchronization and its effectiveness has been verified in the field of EEG(Electro Encephalo Graphy).Aiming at the issue of extracting EEG signal's feature in the current lie detection method,this study applied PLV to the field of EEG of lie detection for the first time.We find lying cognitive mechanism with the correlation between different brain regions under lying cerebration,and use support vector machine (SVM) to execute pattern recognition between liars and honest' signal utilizing the correlation as a feature.The result of classificationaccuracy is 88.50%.Therefore,the proposed method verified that the application of PLV in lie detection is effective and it provided a new way to EEG lie detection signal.