The Neural Basis Of Deception In An Interactive Scene

With the development of brain image technology, there are numbers of researchon the neural mechanism of deception. However, there are several drawbacks in laboratory experiments:the lack of natural and real experimental context; the ignorance of external factors affecting initiative and intention of deception; the lack of through research on social characteristic of deception. In the present study, a Near Infrared Reflectance Spectroscopy (NIRS) was used to examine two topics:(1)the impact of inducement on brain activity during peoples’ deception, in a real context; (2)the social characteristic of deception. A "Boasting" game was used in which two participants were asked to sit face to face. Study 1 examined the impact of inducement on brain activity during people’s response. Study 2 examined the brain activity to different outcome evaluation.The study concluded that:(1)During the response with decision conflicts, the activation of Orbitofrontal area、Frontopolar area、Dorsolateral prefrontal cortex、Frontal eye fields and Pre-Motor and Supplementary Motor Cortex in deception response are larger than in honest response;(2)During the response without decision conflicts, there is no significant difference in the brain activity between deception response and honest response;(3)During the outcome evaluation, the activation of Orbitofrontal area、 Frontopolar area、Dorsolateral prefrontal cortex and Frontal eye fields when opponent don’t scored are larger than opponent scored.(4)During the outcome evaluation, the activation of Frontal eye fields when liar don’t scored are larger than liar scored.Based on these, it concluded that (1) the decision-making conflicts caused by inducement have an impact on brain activity during peoples’ deception and honest response; (2)the brain activity is influenced by others which suggests the social characteristic of deception.