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Event‐related potentials increase the discrimination performance of the autonomic‐based concealed information test
Author(s) -
Matsuda Izumi,
Nittono Hiroshi,
Ogawa Tokihiro
Publication year - 2011
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2011.01266.x
Subject(s) - psychology , test (biology) , cognitive psychology , event (particle physics) , event related potential , neuroscience , electroencephalography , paleontology , physics , quantum mechanics , biology
The concealed information test (CIT) assesses an examinee's crime‐relevant memory on the basis of physiological differences between crime‐relevant and irrelevant items. The CIT based on autonomic measures has been used for criminal investigations, while the CIT based on event‐related potentials (ERPs) has been suggested as a useful alternative. To combine these two methods, we developed a quantification method of ERPs measured in the autonomic‐based CIT where each item was repeated only 5 times. Results showed that the peak amplitude of the ERP difference wave between crime‐relevant and irrelevant items could discriminate between guilty and innocent participants effectively even when only 5 trials were used for averaging. This ERP measure could detect some participants who were missed by the autonomic measures. Combining the ERP and autonomic measures significantly improved the discrimination performance of the autonomic‐based CIT.