FURUMITSU Isato    Department   Hiroshima shudo University  The Faculty of Health Sciences    Position   Professor
Language	Japanese
Publication Date	2018/03
Type	Articles
Title	The effects of retention intervals on P300-based concealed information test using simultaneous auditory and visual stimulus presentation method: Comparison between the immediate group and the one month later group.
Contribution Type	Co-Authored Publication
Journal Type	Japan
Volume, Issue, Pages	18,94-104頁
Number of pages	11
Responsible for	General Discussion
Author and coauthor	Shinji HIRA, Yoshihiro UEDA, Yoko SARAGAI, Yuki HAMAMOTO and Isato FURUMITSU
Details	Most of the P300-based concealed information test (CIT) was carried out with the relatively short interval between a mock crime and the CITexamination. However, about 50% of the field polygraph tests were conducted at least one month after the criminal acts. Here we examined the validity of the P300-based CIT paradigm using simultaneous presentation of visual and auditory stimuli after a long interval between crime and examination. Participants were tested either immediately after the mock crime (N= 10) or after one month (N= 10). Results indicate that P300 amplitudes were significantly larger to probe than to irrelevant stimuli in both groups. Even after a delay of one month probe stimuli could be distinguished from irrelevant stimuli, which suggests theP300-based CIT with simultaneous visual and auditory presentation is feasible for field application.