OBJECTIVE: To examine the self-reported scale of brief psychopathological symptoms (SBPS) to detect malingering in forensic psychiatric cases. METHODS: Two hundred and six cases with different types of psychiatric problems were tested by SBPS. All cases were separately evaluated by two experts. RESULTS: About 34.5% cases (71/206) were classified as malingering by the cut-off 13 scores of SBPS. Compared with expert's evaluation, SBPS showed a false negative rate of 19.8% and a false positive rate of 1.7%, respectively, with a total accuracy rate of 90.8%. Cases involved in compensations including working injury and traffic accidence showed the highest rate of malingering (51%). CONCLUSION SBPS is useful for detecting malingering psychopathological symptoms.
Adult ; Female ; Forensic Psychiatry ; Humans ; Lie Detection ; Male ; Malingering/psychology* ; Mental Disorders/psychology* ; Psychological Tests ; Reproducibility of Results ; Volition ; Young Adult

This paper explores the use of multi-channel event-related potentials (ERP) to identify mentality facticity or detect lie. Some identifiably meaning information, such as subjects' name and birthday, were selected as concealed information to be identified, 15 subjects were tested by concealed information test (CIT) paradigm and their electroencephalographs (EEG) were recorded from 30 electrodes. In virtue of analysis on the statistically significant difference between multi-channel ERPs evoked by probe information and that evoked by irrelevant information, the P300 amplitudes of 15 electrodes were selected as F-test samples. The significant difference of feature sample values between probe and irrelevant information was applied to identify mentality facticity. The results indicate that P300 amplitudes evoked in many electrodes are significantly different between probe and irrelevant information (P < 0.01). According to the significant difference of space sample values between probe and irrelevant information, the detection correctness to probe information reaches to 93.3% and is better than that of methods based single-channel ERP. The method proposed has the advantages of non-invasion and better accuracy, which could be used to identify mentality facticity effectively.
Adult ; Electroencephalography ; methods ; Event-Related Potentials, P300 ; physiology ; Female ; Humans ; Lie Detection ; psychology ; Male ; Neuropsychological Tests ; Young Adult

Polygraph, as a traditional lie detector, is used to detect lies by some changes of human peripheral neuro-vegetative responses. The reliability of this technique, which depends on some other none-instrumental factors to a great extent, has drawn lots of attention and question. Event related potentials (ERPs) have good specificity and time resolution and can monitor instant cognitive processing and brain electric activity. However, its space resolution is poorer than brain function nuclear magnetic resonance imaging (fMRI) relatively. Brain fMRI can show the brain functional changes directly. It has good space resolution but bad time resolution, and all images of fMRI are just the final results of brain changes after lying. So, fMRI technique for detecting deception is still in the basic research phase at present. Contrary to other techniques, psychometrics has been used and studied more in detecting deception or malingery in practice.
Brain/physiology* ; Cognition/physiology* ; Deception ; Event-Related Potentials, P300/physiology* ; Humans ; Lie Detection/psychology* ; Magnetic Resonance Imaging/methods* ; Malingering/psychology* ; Reproducibility of Results ; Sensitivity and Specificity

OBJECTIVE: To investigate the functional magnetic resonance imaging (fMRI) data of deception in antisocial personality disorders (ASPD). METHODS: A total of 32 criminals meeting the criteria for ASPD underwent fMRI at 1.5T while responding truthfully questions or lying. We compared the brain activities between truth-telling and lie-telling, and then computed the correlation coefficient between the contrast brain activities and the inclination to deception. RESULTS: The left anterior cingulate gyrus, the bilateral dorsolateral prefrontal cortex, and left inferior parietal lobule were associated with the executive aspects of deception among people with ASPD. But with the greater inclination to deception, the blood oxygen level dependent (BOLD) activities in those regions decreased. CONCLUSION Evaluations of truthful and untruthful communications pertaining to ASPD subjects may be differentiated in terms of brain BOLD activities, though those activities may decrease in habitual liars, which remains a challenge to the diagnostic accuracy in lie detection.
Adolescent ; Antisocial Personality Disorder ; physiopathology ; psychology ; Brain ; physiology ; Deception ; Humans ; Lie Detection ; Magnetic Resonance Imaging ; Male ; Prefrontal Cortex ; physiology ; Young Adult