First Information Science Section

The first Information Science Section is responsible for the psychological and psychophysiological research related to criminal investigations. The main research theme is the polygraph examination. To improve the accuracy and the reliability of the polygraph examination, our studies focus on the physiological mechanism related to responses in the examination and development of effective physiological indices and question methods.

Development of a Portable Digital Polygraph System for Field Examinations

A portable digital polygraph system for field examination

We developed a portable digital polygraph system; the system is now widely used in criminal investigations in Japan. This system can simultaneously record a variety of physiological activities, such as respiration, skin conductance change, plethysmogram, and electrocardiogram.

Research on New Physiological Indices for Polygraph Examination

A multi-purpose polygraph system

We develop new effective physiological indices and analysis methods of physiological responses for the polygraph examination. The applicability of cardiovascular responses including blood pressure, peripheral skin blood flow, and normalized pulse volume to the polygraph examination are investigated.