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 structure and function.
• 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 tasks with varying trait relevance.
• To determine if task design influences brain-behavior associations.

Main Methods:

• Utilized diffusion-weighted and functional magnetic resonance imaging (MRI) data from 764 Human Connectome Project participants.
• Modeled individual differences in SC-FC coupling using similarity and communication measures.
• Related SC-FC coupling patterns to variations in Big Five personality traits.

Main Results:

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

Conclusions:

• Task relevance is crucial for detecting brain-behavior associations related to personality.
• Optimizing task design in neuroscientific measurements can enhance effect sizes.
• SC-FC coupling during specific tasks offers insights into the neurobiological underpinnings of personality traits.