认知脑电测谎中汉字和图片刺激材料的研究

认知脑电测谎一般采用案件图片刺激或者是具有特定意义的字词句来研究。对汉字和图片的ERP相关研究发现了二者都存在新旧效应,但也发现了二者诱发的特异性ERPs成分在潜伏期、波幅、频率等上不同,存在＂图片优势效应＂。这可能是由于大脑对两种性质不同的刺激材料的认知加工过程差异造成的。本文通过对二种刺激材料的差异研究探讨了在民事和刑事案件中面对不同情况下选择何种刺激材料才能更好地引发目标刺激的反应,有效地提取、识别出特异性目标脑电特征,从而提高检测被测人大脑中是否具有案件相关信息的准确率。

Research of Chinese Characters and Picture as Stimulus in the Cognitive EEG Lie Detection

Picture stimulus or words with specific meaning are generally used to study cognitive EEG lie detecting.Chinese characters and pictures in the study of ERP have been found that they are both old and new,and they are also different in the ERPs evoked in the specificity in the incubation period,amplitude and frequency.There is "picture superiority effect",which may be caused by the different cognitive processing of the brain to stimulating materials with different natures.In the paper,two kinds of stimulus materials are explored in order to discuss that which stimulus material should be chosen to release response of target stimulus better,extract and identify the specific target EEG effectively and improve the accuracy in testing whether there is information cases involved in the measured man’s brain in civil and criminal cases.