Lie detection from fNIR signal and NeuroImage

In this paper, we investigated the hemodynamic response of human brain activity during answering lie with respect to true. For laboratory investigation, several mock lying protocols are used those are verbal lying test and that's so why time consuming. In this research, a new method of mock lying protocol is proposed. With the help of this protocol, some subjects performed mock lying protocol (A written lying protocol) and during that time their hemodynamic responses are collected from prefrontal cortex by fNIR device. It is noteworthy that lying by written is more deceivable than verbal test. Therefore, the main challenge is to discriminate the very little change of hemodynamic response with respect to true answering condition. By this method, we have focused some such characteristics of brain function during lying make the proposed method convenient to detect lie. Furthermore, channel wise significant features are presented to differentiate the brain activities between answering lie and truth. In addition, the specific positions of prefrontal cortex with activation intensity (activation range) are identified while participants lie. This method can be applied for lie detection by observing some more studies.