2011 Fiscal Year Final Research Report
A new algorithm for examining stimulus discrimination using event-related brain potentials
| Project/Area Number |
22730595
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Experimental psychology
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| Research Institution | National Research Institute of Police Science |
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Principal Investigator |
MATSUDA Izumi 科学警察研究所, 法科学第四部, 研究員 (80356162)
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| Research Collaborator |
NITTONO Hiroshi 広島大学, 大学院・総合科学研究科, 准教授 (20304371)
OGAWA Tokihiro 科学警察研究所, 法科学第四部, 主任研究官 (60392263)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 弁別 / 事象関連電位(ERP) / 隠匿情報検査 / 意思伝達 |
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| Research Abstract |
In this study, we developed a new method for examining whether a person can discriminate a specific stimulus from other stimuli using event-related potentials(ERPs). We aimed to reduce the numbers of stimulus repetitions and recording electrodes used for judgment as small as possible. First, we found that a late positive potential with an occipitally dominant scalp distribution was elicited 400-1000 ms after stimulus onset when a participant discriminated a certain stimulus from the other stimuli. Then, we demonstrated that the late positive potential enabled a statistically significant judgment about whether a person discriminated a stimulus from the other stimuli, even when only five stimulus repetitions and one occipital electrode were taken into the calculation. The finding of the present study can be applied to polygraph tests for criminal investigations and communication systems using brain-computer interface.
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