2007 Fiscal Year Final Research Report Summary
The effects of pre-viewing of mock crime scene on detection of deception using P300 after one month and one year
| Project/Area Number |
18530553
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Clinical psychology
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| Research Institution | Fukuyama University |
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Principal Investigator |
HIRA Shinji Fukuyama University, Faculty of Human Cultures and Sciences, Professor (30330731)
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| Project Period (FY) |
2006 – 2007
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| Keywords | detection of deception / P300 / mock crime / previewing video / context-dependency effect / central memory / peripheral memory / Guilty Knowledge Test |
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| Research Abstract |
The present study was designed to test whether refreshing memory of mock-crime details prior to administration of a P300-based guilty knowledge test (GKT) would enhance GKT accuracy in a laboratory setting. P300 amplitude was used as a dependent variable while context-dependency memory effect (central vs. peripheral memory) and periods of GKT administration (one month vs. one year after a mock-crime) were manipulated as independent variables. The mock-crime involved entering a room and stealing a ring from one of five desk drawers (central memory). Beside the ring there was a dip of stationery (peripheral memory). These two items were used as critical items in the GKT that was administered approximately one month or one year after the mock-crime. Prior to the GKT, the refreshing-memory (RM) group viewed a videotape that depicted the room in which they had committed the mock crime, while the participants in the no-RM (NRM) group viewed a videotape of the same length that depicted scenes from other parts of the college. Both the critical items elicited significantly larger P300 amplitudes regardless of the memory manipulation and gaps in time of the GKT administration. These results suggest that the field applications of the GKT may be feasible, with P300 as the dependent variable.
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