Word count abstract: 168Word count manuscript (excluding references, tables, and figure captions): 5350
1: AbstractIt is well known that information that is initially thought to be correct but then revealed to be false, often continues to influence human judgement and decision making despite people being aware of the retraction. Yet little research has examined the underlying neural substrates of this phenomenon, which is known as the 'continued influence effect of misinformation' (CIEM). It remains unclear how the human brain processes critical information that retracts prior claims. To address this question in further detail, 26 healthy adults underwent functional magnetic resonance imaging (fMRI) while listening to brief narratives which either involved a retraction of prior information or not. Following each narrative, subjects' comprehension of the narrative, including their inclination to rely on retracted information, was probed. As expected, it was found that retracted information continued to affect participants' narrative-related reasoning. In addition, the fMRI data indicated that the continued influence of retracted information may be due to a breakdown of narrative-level integration and coherence-building mechanisms implemented by the precuneus and posterior cingulate gyrus.Keywords: continued influence effect; misinformation; memory updating MISINFORMATION PROCESSING 3
2: IntroductionThe persistence of erroneous beliefs appears ubiquitous in modern societies (Lewandowsky et al., 2012). One need look no further than the purported link between a common childhood vaccine and autism which has no scientific basis but is widely accepted by the public (Horne et al., 2015), or the persistent belief in the existence of Weapons of Mass Destruction in Iraq before the invasion of 2003 even though none were ever found (Jacobson, 2010;Kull et al., 2003). Much misinformation now spreads online, and accordingly, the World Economic Forum recently listed digital misinformation as one of the main challenges to societies globally (WEF, 2013).Decades of behavioral research indicate that discredited information can continue to influence people's beliefs and reasoning even after that information has been retracted-a phenomenon known as the continued influence effect of misinformation (CIEM) Ecker et al., 2010;Johnson & Seifert, 1994;Wilkes & Leatherbarrow, 1988; for reviews see Lewandowsky et al., 2012;Schwarz et al., 2016). The CIEM can occur even when people (a) remember the retraction (Johnson & Seifert, 1994;Marsh et al., 2003), and/or (b) receive prior warning about their exposure to false information (Ecker et al., 2010).Attempts to retract misinformation in real world settings therefore often struggle to prove effective (Miton & Mercier, 2015;Nyhan & Reifler, 2015).Difficulties in creating effective interventions against misinformation may also partially reflect the fact that the cognitive mechanisms underlying the CIEM remain elusive. To date, two main explanations have been discussed in the literature.Acc...