Trait-Relevant Tasks Improve Personality Prediction From Structural-Functional Brain Network Coupling

Area of Science:

• Neuroscience
• Psychology
• Brain Imaging

Background:

• Personality traits reflect stable behavioral and cognitive patterns.
• Neurobiological correlates of personality are found in brain networks.
• Structural and functional brain network coupling (SC-FC) is a key area of investigation.

Purpose of the Study:

• To investigate the association between SC-FC coupling and individual differences in the Big Five personality traits.
• To examine SC-FC coupling during resting state and various tasks with differing trait relevance.
• To determine if task relevance enhances the detection of brain-behavior associations.

Main Methods:

• Utilized diffusion-weighted and functional magnetic resonance imaging (dMRI & fMRI) data from 764 Human Connectome Project participants.
• Modeled individual differences in SC-FC coupling using similarity and communication measures.
• Assessed SC-FC coupling during resting state and seven tasks, varying in trait relevance.

Main Results:

• Small but significant associations between SC-FC coupling and personality traits were observed primarily during trait-relevant tasks.
• Agreeableness showed associations during social cognition tasks.
• Conscientiousness could be predicted from task-general coupling patterns.

Conclusions:

• Task relevance is crucial for detecting brain-behavior associations related to personality traits.
• Optimizing task selection in neuroscientific measurements can increase effect sizes.
• This approach offers a promising avenue for future brain-behavior research.