GKT原理的模拟犯罪测试范式实验研究

目的:本实验旨在以实际犯罪较接近的实验场景验证GKT的测谎机制,并探讨其对罪犯以及其他嫌疑人的判定有效性。方法:以72名健康大学生为被试,让被试在模拟犯罪的背景下采用三种包含不同说谎和认知成分的回答方式进行测谎测试,采用Limestone测谎仪测量被试皮肤电反应。结果:回答方式与角色两因子在判定分数上的主效应均显著,交互作用不显著。结论:在模拟犯罪测试范式下,GKT模式中认知与说谎机制是共存的,其中认知成分不占主要地位,说谎成分占主要地位,GKT模式无法兼顾有效地判定"犯罪"和"知情无辜"角色,需进一步改进。

GKT Laboratory Research with the Mock——crime Paradigm

Objective:To explore the roles of cognition and deception in the Guilty Knowledge Tests and its effectiveness on the judgement of the guilt and the informed innocent people.Methods:72 healthy undergraduates participated in the study and were randomly assigned to the experimental conditions.This research was composed of one laboratory experiment with the mork crime paradigm in GKT, and the widely measured electrodermal responses(EDRs) as the physiological index.Three response modes were designed in the experiment in order to test the existence of cognition and deception components.Results:Significant differences of judgement scores were observed in different reponse modes and different roles.Conclusion:Deception plays a more important role than cognition in GKT.However, GKT can not efficiently discriminate the guilty and informed innocent people and needs futher exploration.