Identification and Classification of Facial Familiarity in Directed Lying: An ERP Study
Figure 3
Task paradigm and 2D map of channels.
(A) Schematic paradigm of the directed-lying task. In each trial, after a randomized inter-trial interval of 800 to 1,200 ms, a condition cue of either “Lie” or “Truth” was presented on the screen for 1,000 ms. This was followed by a randomized 200 to 600 ms blank screen inter-stimulus interval (ISI), after which a face appeared on the screen for 600 ms. A fixation cross was presented on the screen for 1,200 ms to allow time for the participants to prepare their response. Finally, after a randomized 200 to 600 ms blank ISI, the question “Do you know him?” appeared on the screen to prompt a response. Participants were asked to respond within 1,000 ms in accordance with the lie/truth cue presented previously. (B) 2D map of the channels distributed on the scalp. The top denotes the frontal side and the left denotes the left side.