研究資料
隠匿情報検査における脈波直流成分の利用可能性
2022 年 93 巻 1 号 p. 43-50
詳細
2022 年 93 巻 1 号 p. 43-50
This study investigated the validity of the direct current component of a finger plethysmograph, often called blood volume (BV), as a measure for the concealed information test (CIT), that is, the psychophysiological memory detection test. The BV, pulse volume (PV), and normalized pulse volume (NPV) obtained from experimental mock crime CITs were analyzed, with 23 participants taking part in knowledgeable and unknowledgeable CITs. The results revealed that all measures could discriminate crime-relevant and irrelevant information with the mean value of each time series but could not with the phasic change from the base level. Furthermore, the results showed that the discriminability of BV between relevant and irrelevant items was higher when the NPV was low. In conclusion, BV could be an effective measure for CIT, especially under conditions of severe vasoconstriction.
