Tonic arousal during field polygraph tests in guilty vs. innocent suspects in Japan.
Eighty four sets of GKT field data (52 guilty and 32 innocent persons) were analyzed for tonic level of heart rate and respiration rate during polygraph interrogation. The innocent persons in our sample showed consistently lower heart rate than guilty persons and revealed significant decrease over the course of interrogation, whereas guilty persons did not. Respiration rate was not significantly different between these two groups. Although it is popularly believed that a naïve person tends to show and maintain higher cardiovascular and respiratory activity during polygraphy, and that this makes polygraph interrogation ineffective, such is not the case at least in the GKT polygraph.
Hira
Shinji
S
Department of Psychology, Fukuyama University, Ichibanchi Sanzo Gakuencho, Fukuyama 729-0292, Japan. hira@fuhc.fukuyama-u.ac.jp
Furumitsu
Isato
I
D000328:Adult; D000704:Analysis of Variance; D001143:Arousal / Q000502:physiology*; D003415:Crime / Q000523:psychology; D005260:Female; D005712:Galvanic Skin Response; D006167:Guilt; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007564:Japan; D008014:Lie Detection / Q000523:psychology*; D008297:Male; D011329:Prisoners; D011603:Psychophysiology / Q000295:instrumentation; D015656:Respiratory Mechanics / Q000502:physiology; D012815:Signal Processing, Computer-Assisted