Brain System for Social Categorization by Narrative Roles

Area of Science:

• Neuroscience
• Cognitive Science
• Social Psychology

Background:

• Social categorization is key to human cognition.
• Previous research focused on demographic categories like age and race.
• The brain's mechanism for categorizing narrative roles remains unclear.

Purpose of the Study:

• To investigate how the neurocognitive system categorizes cinematic characters based on narrative roles.
• To identify brain networks involved in role-based social categorization.
• To differentiate role categorization from individual attribute categorization.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used.
• Participants judged personality traits of 16 cinematic characters across four roles: hero, sidekick, mentor, villain.
• Classification analysis identified brain regions discriminating between roles.

Main Results:

• A distinct brain network, including the dorsal medial prefrontal cortex, precuneus, temporoparietal junction, and left occipital face area (OFA), discriminated between the four narrative roles.
• This network showed no discrimination for individual attributes like age or film.
• Default mode network (DMN) regions were more involved in role discrimination than individual character discrimination, while OFA focused on individuals.

Conclusions:

• Narrative roles are inherently categorized by the neurocognitive system.
• Role categorization is linked to brain regions supporting social cognition and self-referential processing.
• This suggests a fundamental role for narrative structures in social cognition.