Polygraph Accuracy of Control Question Test in Criminal Cases.
Fa Yi Xue Za Zhi
; 35(3): 295-299, 2019 Jun.
Article
in En, Zh
| MEDLINE
| ID: mdl-31282623
ABSTRACT: Objective To explore polygraph accuracy of Control Question Test ï¼CQTï¼and whether it could be influenced by examinee's education level and type of violation of law. Methods Real cases of CQT ï¼n=104ï¼ and the data from MAO ï¼n=296ï¼ were collected. The polygraph accuracy of CQT was calculated. Variance analysis on three groups of different education levels was used to compare their age, and then the chi-square test was employed to compare polygraph accuracy among the groups. Independent sample t test was used to compare the age of subjects in the two groups of different types of violation of law, and then chi-square test was used to compare the true positive rate and true negative rate of lie detection after integration. Results In CQT lie detection of criminal cases, the true positive rate was 87.00%, the false negative rate was 13.00%, the true negative rate was 82.20%, and the false positive rate was 17.80%. There was no statistical significance in the differences between the true positive rate and the true negative rate ï¼P>0.05ï¼. In CQT lie detection of the groups of different education levels, there was no statistical significance in the differences between the true positive rates ï¼P>0.05ï¼ while the differences between the true negative rates had statistical significance ï¼P<0.05ï¼. There was no statistical significance in the differences of both the true positive rates and the true negative rates between the violent violation of law and non-violent violation of law ï¼P>0.05ï¼. Conclusion There is no significant difference between the efficiency of CQT lie detection of identifying criminals and excluding innocents. However, a comparatively high false positive rate and false negative rate still exist. The efficiency of CQT lie detection identifying criminals may not influenced by the examinee's education level and type of violation of law, but its efficiency of excluding innocents may be influenced by the examinee's education level.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Criminals
/
Lie Detection
Language:
En
/
Zh
Journal:
Fa Yi Xue Za Zhi
Journal subject:
JURISPRUDENCIA
Year:
2019
Document type:
Article
Affiliation country:
Country of publication: