Host: The Japanese Society for Cognitive Psychology
We examined inter-brain coupling of paired Liar and Detector in a face-to-face communication condition using near-infrared spectroscopy (NIRS). In the Learning Session, Liars read presented sentences and performed Action (enactment of) or Speech (reading aloud of) a presented sentence. In the Recognition Session, Liars recognized their performance for each sentence presented in the Learning Session by a key press. In the Lying Session, Liars read the same sentences and then performed one of the following tasks by key press and immediate verbal report: Truth and Lying (honestly and dishonestly report performance conducted in the Learning Session, respectively). Then, only the Detector received true-false feedback for lie detection on a monitor. We measured the brain activities of paired participants during the Lying Session. The detection rate of a Detector was approximately 50%. NIRS data of paired participants showed a significant inter-brain correlation in their right IFG for correct Detector responses.
