虚拟环境中犯罪的延时反应测谎：ERP研究

发布时间：2018-04-29 20:49

本文选题：测谎 + P300　；参考：《浙江师范大学》2010年硕士论文

【摘要】： 基于行为反应、认知神经科学和虚拟现实的研究不断为理解说谎的认知机制和测谎技术带来新的启示：采用多指标结合的方法检测被试隐瞒的临时习得或个人相关信息是ERP测谎的一个趋势。前人研究证明反馈条件下的CNV可以与P300在犯罪知识测试中表现出良好的测谎效果；另一方面,虚拟现实技术为隐瞒信息的获取提供了新的实验空间。目前尚未有研究将虚拟现实技术和多指标测谎相结合,因此本研究从上述角度出发展开探索。本研究采用GKT延时反应范式,被试在虚拟环境中“杀人”后接受有反馈的测谎,以此来考察P300和CNV在隐瞒信息上的差异。研究分为两个实验。实验一初步探索了P300和CNV两个指标对虚拟环境犯罪的测谎效果,验证了虚拟环境中犯罪测谎的有效性。实验二在实验一的基础上加入无辜组,重点考察两个ERP指标对犯罪组和无辜组被试的测谎效果。得到以下结论： (1)虚拟环境可以为测谎研究提供模拟犯罪任务的场景。该条件下的模拟犯罪测谎能得到和经典模拟犯罪测谎相似的结果。 (2)对探测刺激,P300在Cz点有最大波幅；CNV在Fz点有最大波幅。在Cz点,犯罪组在探测刺激上比无关刺激诱发了更正向的P300和更负向的CNV；无辜者不存在这一差异。犯罪组在探测刺激上的P300和CNV波幅显著大于无辜组。 (3)相比需要高动机条件支持的CNV, P300指标测谎更具有稳定性；两种指标的结合能达到更加准确的效果 (4)在延时反应范式中,反应时在说谎中比诚实更快,不适于作为测谎指标。
[Abstract]:Based on behavioral responses, The research of cognitive neuroscience and virtual reality has brought new enlightenment for understanding the cognitive mechanism of lying and polygraph technology: it is a trend of ERP to detect the temporary acquisition or personal information concealed by multiple indexes. Previous studies have proved that CNV and P300 under feedback conditions can show good results in criminal knowledge testing. On the other hand, virtual reality technology provides a new experimental space for the acquisition of hidden information. At present, there is no research on virtual reality technology and multi-index polygraph detection, so this study starts from the above point of view. In this study, GKT delay response paradigm was used to investigate the difference between P300 and CNV in concealing information by accepting the feedback lie detector after "killing" in virtual environment. The study was divided into two experiments. In the first experiment, the effect of P300 and CNV on the detection of crime in virtual environment is preliminarily explored, and the validity of crime lie detection in virtual environment is verified. In the second experiment, innocent group was added on the basis of experiment 1, and the effect of two ERP indexes on lie-detection of crime group and innocent group was studied. The following conclusions were drawn: Virtual environment can provide the scene of simulating crime task for lie detection research. The simulated crime lie detection under this condition is similar to that of classical simulated crime lie detection. 2) there is a maximum amplitude for the probe stimulus P300 at Cz and CNV at FZ. At the Cz point, the crime group induced the corrected P300 and the more negative CNV in detecting stimuli than the unrelated stimuli; the innocent did not have this difference. The amplitudes of P300 and CNV were significantly higher in the crime group than in the innocent group. Compared with CNV which needs high motivation condition, the P300 index lie detector is more stable, and the combination of the two indexes can achieve more accurate results. 4) in the delayed response paradigm, the response time is faster in lying than honesty, and is not suitable as a lie detection indicator.
【学位授予单位】：浙江师范大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：D917

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