[E] 口頭英語

[E-02] Neural Correlates of Action and Speech Memory Based Deception and Its Detection:

A Near-infrared Spectroscopy (NIRS) Study of Inter-brain Coupling Using a Feedback Task

*Hirofumi Saito¹, Chenhui Lin ², Godai Saito^3,4, Jiro Gyoba³, Yukio Itukushima⁵ (1. Graduate School of Informatics, Nagoya University, 2. Graduate School of Information Science, Nagoya University, 3. Graduate School of Arts and letters, Tohoku University, 4. Japan Society for the Promotion of Science, 5. Graduate School of Literature and Social Sciences, Nihon University)

Keywords:Lie and Detection, Speech and Action, NIRS

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 5%. NIRS data of paired participants showed a significant inter-brain correlation in their right IFG for correct Detector responses.