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People who score higher in openness to experience show a stronger brain response when a word clearly doesn't belong, a new study in Physiology & Behavior reports1. This research on openness to experience and the brain recorded brain waves while people judged whether words fit a category. Higher and lower scorers did comparably well on the task. The difference showed up only in the brain signal.
The findingWhat Did the Study Find About Openness to Experience and the Brain?
Higher openness went with a bigger gap in the brain's N400 response between two kinds of wrong words: those from a related category and those from an unrelated one.
The N400 is a brain-wave signal named for a negative dip about 400 milliseconds after a word appears. It tracks how well a word fits its context. In this study, it grew more negative step by step as words became less related to the category, which is the pattern researchers expected.
People judged words at four levels of relatedness:
| Level | What it means | Example (ours, category: birds) |
|---|---|---|
| High typicality | A typical member | robin |
| Low typicality | A less typical member | penguin |
| Related violation | Not a member, but close | bat |
| Nonrelated violation | Not a member, and unrelated | chair |
Openness predicted the N400 gap beyond the other four Big Five traits. So the effect was specific to openness, not to extraversion, conscientiousness, agreeableness or neuroticism. The team measured the traits with the NEO Five-Factor Inventory, a standard Big Five questionnaire. You can see your own five scores with our Big Five test.
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Why it mattersDoes Openness Make Word Processing Easier?
Not in a simple way, the authors say. Their results don't fit an account in which higher openness uniformly eases the processing of meaning.
Follow-up analyses showed where the gap came from. It was driven mainly by stronger N400 responses to unrelated words, not by weaker responses to related ones.
The authors offer two readings. People higher in openness may be more sensitive to a clear mismatch in meaning. Or they may keep evaluating a word for longer when it clashes with the context they have in mind. The authors say the exact mechanism still needs to be worked out.
What it meansWhat Does This Mean for People High in Openness?
It hints that a curious, open mind may treat a clear mismatch in meaning more seriously, without doing any better or worse on the task.
Openness is the Big Five trait for curiosity, imagination and interest in new ideas. The abstract notes it has been linked to creativity and to engaging with new information. This study adds a brain-level detail: people higher in the trait reacted more strongly when meaning clearly broke down.
Want to see how openness fits with the rest of your personality? Take our personality test for your type, or browse the 16 personality types. Idea-driven types such as the ENFP and the INTJ are good places to start. For another Big Five trait in the news, read our story on neuroticism and anxiety.
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QuestionsOpenness to Experience and the Brain: FAQ
What is openness to experience?
Openness to experience is one of the Big Five personality traits. It covers curiosity, imagination and interest in new ideas and experiences. This study measured it with the NEO Five-Factor Inventory.
What is the N400?
The N400 is a brain-wave signal recorded from the scalp. It is named for a negative dip about 400 milliseconds after a word, and it grows as a word fits its context less well.
Are people high in openness better with words?
This study doesn't show that. Task success was comparable across participants. The differences appeared in the brain signal, not in how well people did.
SourcesThe Study and Our Sources
- Li, B., Huang, C.-M., Lin, Q., & Huang, H.-W. (2027). Openness to experience modulates the neural dynamics of semantic processing. Physiology & Behavior, 318, 115537. DOI 10.1016/j.physbeh.2026.115537
