Moral belief updating (MBU) as a neurocognitive and communicative process: a multidimensional perspective

This study investigates the neural correlates of MBU within dyadic moral communication, using a functional near-infrared spectroscopy (fNIRS) hyperscanning paradigm. Thirty participants engaged in a structured exchange on a moral dilemma, assuming one of two roles: the facilitator and the adjuster. Hemodynamic activity was recorded across prefrontal channels. Results revealed a significant increase of oxygenated hemoglobin in right lateral prefrontal cortex activation (Ch4) in adjusters compared to facilitators, highlighting the role of this region in social metacognition, behavioral regulation, and high-level cognitive control during MBU. Exploratory correlations further indicated that facilitators' neural activation was associated by dispositional traits such as decision-making style, empathy, and conscientiousness. These findings highlight the role of interpersonal co-construction and individual meaning-making processes in influencing neurocognitive responses to moral discussions. The study presents a multidimensional model of MBU as a socially embedded, emotionally modulated, and cognitively demanding process, impacting moral and communication psychology and organizational ethics.