Daily application of the Concealed Information Test: Japan

Abstract

Overview : Japan is the only country in the world where the Concealed Information Test (CIT) is applied on a large scale. In Japan, approximately 5,000 examinations are conducted annually by about 100 professional examiners. This chapter provides a detailed description of how those examinations are conducted, from the request for the examination to the report of the result. Procedural aspects such as generating the questions are illustrated with real-life examples. Finally, I discuss the current status of the CIT in Japan and some future prospects of the CIT. Japan is the only country in the world where the Concealed Information Test (CIT) is applied on a large scale. Furthermore, the CIT is the only polygraph technique used in Japan, as the Control Question Test (CQT) is no longer applied. Polygraph examiners in Japan carry out the CIT on a daily basis. Throughout the country, about 5,000 examinations are conducted annually. These are performed by professional examiners assigned in each prefecture. This chapter provides a detailed description of how the polygraph examination is conducted in Japan, and why the CIT is successfully utilized in Japan. Examiner There are about 100 examiners in Japan. All examiners are assigned to a forensic science laboratory of a prefectural police headquarters. Typically the polygraph examiners belong to the psychological evidence section of their forensic science laboratories. The laboratory staff does not consist of police officers but of technical officers, who are also engaged in research.

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