title: A new discrimination method for the Concealed Information Test using pretest data and within-individual comparisons.
abstract: A latent class discrimination method is proposed for analyzing autonomic responses on the concealed information test. Because there are significant individual differences in autonomic responses, individual response patterns are estimated on the pretest. Then an appropriate discriminant formula for the response pattern of each individual is applied to the CIT test results. The probability that the individual concealed information is calculated by comparing the discriminant formula value of the crime-related item to that of non-crime-related items. The discrimination performance of the latent class discrimination method was higher than those of the logistic regression method and the discriminant analysis method in an experimental demonstration applying the three methods to the same data set.
authors.affiliation: National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa, Chiba, Japan. izumi@nrips.go.jp
authors.forename: Izumi
authors.initials: I
authors.lastname: Matsuda
authors.forename: Akihisa
authors.initials: A
authors.lastname: Hirota
authors.forename: Tokihiro
authors.initials: T
authors.lastname: Ogawa
authors.forename: Noriyoshi
authors.initials: N
authors.lastname: Takasawa
authors.forename: Kazuo
authors.initials: K
authors.lastname: Shigemasu
mesh_terms: D000328:Adult; D001143:Arousal / Q000502:physiology; D001341:Autonomic Nervous System / Q000502:physiology*; D001499:Bayes Theorem; D001783:Blood Flow Velocity / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology; D003415:Crime; D005260:Female; D005385:Fingers / Q000098:blood supply; D005712:Galvanic Skin Response / Q000502:physiology; D006167:Guilt; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007206:Individuality; D008014:Lie Detection / Q000523:psychology*; D016015:Logistic Models; D008297:Male; D012372:ROC Curve; D012119:Respiration