P300 amplitudes in the concealed information test are less affected by depth of processing than electrodermal responses
P300 amplitudes in the concealed information test are less affected by depth of processing than electrodermal responses
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DOI：
10.3389/fnhum.2012.00308
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发表时间：
2012-11-15
影响因子：
2.9
通讯作者：
Berti, Stefan
中科院分区：
文献类型：
--
作者：
Gamer, Matthias;Berti, Stefan
隐藏信息测试（CIT）已在实验室和现场应用中用于检测隐藏的犯罪相关记忆。与中性测试项目相比，向犯罪嫌疑人呈现犯罪相关细节已被证明会引起事件相关脑电位（ERP）的N200和P300振幅增强以及皮肤电导反应（SCR）更大。发现这些电生理和皮肤电反应对测试的有效性有增量贡献，从而表明这些反应系统对不同的心理过程敏感。在目前的研究中，我们测试了是否处理深度差异影响N200，P300，和SCR幅度在CIT。20名参与者进行了模拟犯罪，并熟悉了中心和外围犯罪细节。1周后进行的CIT显示，中央细节的SCR幅度较大，尽管在随后的外显记忆测试中，中央和外围项目同样记得很好。相比之下，P300振幅引起的犯罪相关的细节较大，但没有显着差异的问题类型。在这项研究中，N200振幅不允许检测隐藏的知识。这些结果表明，深度的处理可能是一个因素，差异影响中枢和自主神经系统的反应隐藏的信息。这种区分可能与CIT的现场应用高度相关。
The Concealed Information Test (CIT) has been used in the laboratory as well as in field applications to detect concealed crime related memories. The presentation of crime relevant details to guilty suspects has been shown to elicit enhanced N200 and P300 amplitudes of the event related brain potentials (ERPs) as well as greater skin conductance responses (SCRs) as compared to neutral test items. These electrophysiological and electrodermal responses were found to incrementally contribute to the validity of the test, thereby suggesting that these response systems are sensitive to different psychological processes. In the current study, we tested whether depth of processing differentially affects N200, P300, and SCR amplitudes in the CIT. Twenty participants carried out a mock crime and became familiar with central and peripheral crime details. A CIT that was conducted 1 week later revealed that SCR amplitudes were larger for central details although central and peripheral items were remembered equally well in a subsequent explicit memory test. By contrast, P300 amplitudes elicited by crime related details were larger but did not differ significantly between question types. N200 amplitudes did not allow for detecting concealed knowledge in this study. These results indicate that depth of processing might be one factor that differentially affects central and autonomic nervous system responses to concealed information. Such differentiation might be highly relevant for field applications of the CIT.