Understanding how people think and work together is central to interventional psychiatry. A new study sheds light on how personality traits change neural engagement in social attention and offers insights that may one day guide personalized mental health treatments. By exploring fast, millisecond-level brain signals recorded with EEG, researchers found that traits such as conscientiousness and neuroticism influence how the brain processes social information.
What is neural engagement in social attention?
Social attention describes the mental process of tuning into another person’s focus or goal. It helps us coordinate, cooperate, and anticipate each other’s behavior. Scientists have long known that when two people work together, they automatically track elements of each other’s tasks even when those elements do not directly relate to their own work. This is called co-representation.
The new study asked whether neural engagement in social attention differs from person to person. Specifically, do personality traits predict how strongly the brain responds to a partner’s presence during collaborative tasks?
Measuring Personality, Attention, and EEG Signals
To answer this, researchers recruited fifty university students and assessed their personality profiles using the Big Five Inventory. This tool evaluates five major personality domains and their more detailed subcomponents, such as Responsibility within Conscientiousness or Depression within Neuroticism.
Participants worked in pairs while seated in a quiet lab space with limited sensory distraction. Although they could not see or hear each other, they shared a virtual task known as the joint Flanker task. Each participant viewed a series of letters on a screen and had to identify a target letter while ignoring distractors. Some distractors were irrelevant, while others matched their partner’s target letters. When the partner’s letters appeared, participants typically slowed down, confirming co-representation.
While participants worked, researchers recorded brain activity with EEG. They focused on two electrical signals that reveal how the brain handles conflict and attention. The first, called the N2 component, reflects the brain’s early detection of conflicting information. The second, the P3 component, indicates how much attention and control the brain applies to process a task.
Conscientiousness Boosts Neural Engagement In Social Attention
One of the clearest findings was that conscientious individuals showed stronger P3 signals. This suggests they devote more neural resources to staying focused and organized during shared tasks. People scoring high in the Responsibility facet showed especially strong engagement. Their brains appeared to treat the collaborative environment as something that needed careful monitoring and follow-through.
This heightened P3 response aligns with behavioral research showing that conscientious people often sustain attention more effectively and feel a greater internal drive to meet expectations during group activities.
Neuroticism Reduces Early Conflict Monitoring
Neuroticism told a different story. Individuals with higher neuroticism scores, particularly those high in the Depression facet, showed reduced N2 amplitudes. Instead of reacting strongly to conflicting social information, their brains dampened early responses.
Researchers believe this reduced neural engagement may serve as a protective strategy. For some people, social conflict can feel overwhelming. Dampening the N2 response may limit emotional overload and help them stay functional during demanding interactions.
Advanced machine learning models supported these findings, highlighting neuroticism as the most reliable predictor of N2 variation and showing that specific facets often outperform broad personality categories.
Why these findings matter for mental health and interventional psychiatry
This study highlights that social attention is not a uniform process. Two people may participate in the same group task, yet their brains respond differently based on their personality traits. For interventional psychiatry, this suggests that individual differences in neural engagement could influence how patients respond to social therapies, neurofeedback training, or collaborative treatment settings.
Future research may explore whether people with similar personality profiles show stronger brainwave synchronization or whether targeted interventions could modify these neural patterns.
These early insights help expand the growing field of personality neuroscience, offering clinicians another perspective on how brain function and personality shape interpersonal behavior.
Citations
- Hang Y, Wu W, Shioiri S, He X. Personality and social attention: Trait driven differences in neural engagement. Brain Research. 2025;1866:149905. networks.https://doi.org/10.1016/j.brainres.2025.149905
- Hang Y, Wu W, Shioiri S, He X. Neural mechanisms of personality based differences in shared task processing. Brain Research. 2025.
https://www.sciencedirect.com/science/article/pii/S0006899325003210