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Individual differences in neural event segmentation of continuous experiences.

Clara Sava-Segal¹, Chandler Richards², Megan Leung¹

¹Department of Psychological and Brain Sciences, Dartmouth College, Hanover, NH 03748, USA.

Cerebral Cortex (New York, N.Y. : 1991)

|March 30, 2023

Summary

Individual differences in neural event segmentation, crucial for memory, vary across brain regions. This variability influences how we remember and interpret movies, highlighting segmentation

Keywords:

event segmentation fMRI individual differences naturalistic stimuli stimulus properties

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Area of Science:

Cognitive Neuroscience
Neuroscience
Perception

Background:

Event segmentation organizes continuous information for memory.
Neural and behavioral segmentation show consistency but also individual variability.
Understanding individual differences in event segmentation is key to explaining varied interpretations.

Purpose of the Study:

To characterize individual differences in neural event boundary locations across different movie stimuli.
To investigate the relationship between segmentation rate and variability in boundary locations.
To determine the behavioral significance of neural boundary variability on memory and appraisal.

Main Methods:

Analysis of neural event boundary locations during movie watching across participants.
Correlation of boundary alignment with segmentation rate along a posterior-to-anterior gradient.
Assessment of the link between neural boundary similarity and behavioral memory/appraisal similarity.

Main Results:

Event boundary alignment followed a posterior-to-anterior gradient correlated with segmentation rate.
Slower-segmenting regions exhibited greater individual variability in boundary locations.
Neural boundary variability predicted behavioral similarity in memory and appraisal of movies.

Conclusions:

Individual differences in neural event segmentation contribute to variable memory and appraisal of stimuli.
Event segmentation mechanisms may explain how narratives generate diverse interpretations.
Specific brain regions show neural boundaries aligned with behavior and predictive of interpretation.