Neural Correlates of Action and Speech Memory Based Deception and its Detection

: A Near-Infrared Spectroscopy (NIRS) study

Abstract

TThis research was originally designed to contribute to the growing literature of deception-detection by examining the behavioral/neural differences between (1) lies of what people say (Speech-Lies) and of what people do (Action-Lies) and (2) a single liar in Exp. 1 versus a paired liar with detector in Exp. 2 & 3. Three experiments were conducted to examine the neural correlates for lies of Action (enactment of a presented sentence) and Speech (reading aloud of a presented sentence) in Exp. 1-3, and also for its detection in Exp. 2-3. Here, specifically, we focused on the behavioral and neural aspects of lie Detector in a face-to-face communication condition. The NIRS data of Detector in the left IPL and the right IFG for Lie showed higher neural activity than Truth, nevertheless the detection rates of a Detector did not show differences between Truth and Lie of the paired Liar.