fMRI Correlates of Reaction Time Prolongation during intentional False Responding; an inter-individual difference study

Abstract

22Reaction time (RT) is chiefly longer when people lie. However, the baseline speed in answering 23 questions and the amount of RT prolongation during lying show considerable amount of inter-individual 24 variability. In the current study, we exploited this fact to glean insights on the contribution of each lie-25 related brain region to hampering of response speeds when people try to be deceitful. In an event-related 26 fMRI session, participants were interrogated by yes-no autobiographical questions and were instructed to showed lie-related increase in activity but did not correlate with either of behavioral measures. 37Provisional implications regarding the contribution of these regions to RT prolongation and their 38 cognitive role in deceitful behavior are discussed.

Understanding the neural basis of deception versus truth-telling

“…To our knowledge, this study is the first to provide a direct empirical examination on the neural underpinnings associated with spontaneous deception and truth-telling. While past neuroimaging studies have shown the DLPFC and VLPFC to be consistently activated during deception (Abe et al, 2006;Ito et al, 2012;Lee et al, 2010;Peth et al, 2015;Pishnamazi et al, 2016), and some studies showing IPL activation for deception (Cui et al, 2014;Kireev et al, 2013;Nose, Murai, & Taira, 2009), activities in these frontoparietal brain regions were also found for truth-telling (Yin et al, 2016). Activation of the frontoparietal regions for spontaneous truth-telling was attributed to decision making and cognitive control when facing with a temptation to deceive.…”

“…The functional involvement of DLPFC for working memory (Cohen et al, 1997), VLPFC for response inhibition (Rubia et al, 2001;Rubia, Smith, Brammer, & Taylor, 2003), and lateral PFC (found in the DLPFC) for task switching (Dove, Pollmann, Schubert, Wiggins, & Von Cramon, 2000) have also been well established in non-deception studies. As far as deception is concern, significant activations consistently observed in the DLPFC and VLPFC would highlight the involvement of executive function in deception (Ito et al, 2012;Pishnamazi, Doost, Ganjgahi, Ekhtiari, & Oghabian, 2016;Priori et al, 2008;.…”