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Year of Publication: 2018
Project: BOLD Connectivity Dynamics
FIM Authors:
Authors:
  • Emily Finn
  • Philip R. Cortlett
  • Gang Chen
  • Peter A. Bandettini
  • R. Todd Constable
Abstract: Individuals often interpret the same event in different ways. How do personality traits modulate brain activity evoked by a complex stimulus? Here we report results from a naturalistic paradigm designed to draw out both neural and behavioral variation along a specific dimension of interest, namely paranoia. Participants listen to a narrative during functional MRI describing an ambiguous social scenario, written such that some individuals would find it highly suspicious, while others less so. Using inter-subject correlation analysis, we identify several brain areas that are differentially synchronized during listening between participants with high and low trait-level paranoia, including theory-of-mind regions. Follow-up analyses indicate that these regions are more active to mentalizing events in high-paranoia individuals. Analyzing participants' speech as they freely recall the narrative reveals semantic and syntactic features that also scale with paranoia. Results indicate that a personality trait can act as an intrinsic 'prime,' yielding different neural and behavioral responses to the same stimulus across individuals.
Data
Journal: Nature Communications
Volume: 9
URL: http://www.nature.com/articles/s41467-018-04387-2
DOI: 10.1038/s41467-018-04387-2