Summary: Whether you’re negotiating a contract or playing a friendly game of rock-paper-scissors, your brain is constantly “sizing up” the other person—a process scientists call adaptive mentalization. A new study has identified a specific neural “fingerprint” that predicts how quickly and accurately we infer the intentions of others.
By tracking over 570 participants using fMRI, researchers discovered a distributed social network in the brain that activates the moment we realize our expectations of someone else are wrong. This discovery could revolutionize how we diagnose and treat social cognition disorders like autism or borderline personality disorder.
Key Facts
- The “Mentalization” Network: The brain uses a specific network involving the temporoparietal cortex (thoughts of others) and the dorsomedial prefrontal cortex (social appraisal) to update its opinion of people.
- Neural Fingerprint: Researchers can now predict with 90% accuracy how well a person will adapt to an opponent’s changing strategy just by looking at their brain activity patterns.
- The “Oops” Spike: The anterior insula spikes in activity specifically when our expectations of someone else are proven wrong, forcing a mental reassessment.
- Dynamic Interaction: Unlike previous studies that used static stories, this research used live, repeated games, proving that mentalization is an ongoing, fluid process rather than a static state.
- Clinical Potential: These neural markers could be used to objectively measure social cognitive abilities in patients and track the effectiveness of social skills therapies.
Source: University of Zurich
How quickly do we perceive whether a person we are interacting with is clever or predictable?
Be it in a game, a conversation or a negotiation, we constantly infer what others are thinking and size up their intentions, and we adjust our behavior accordingly in a process that scientists call “adaptive mentalization.”
A new study by the University of Zurich now reveals how our brains govern this adaptation.
Differences in social mentalization
A team of researchers led by Christian Ruff, a professor of neuroeconomics and decision neuroscience at the University of Zurich, examined the behavior of over 570 people in different game situations.
The study subjects played a repeated rock-paper-scissors game against human or artificial opponents. With the aid of a novel computational model, the researchers quantified how strategically the subjects sized up their respective opponents and how much they adapted their estimation of them after each round.
The study found that most of the subjects reacted flexibly when the opponent’s behavior changed, but there was a wide range of reaction flexibility between the participants in the study.
“Some can do that very quickly – they are often good at recognizing what strategy their opponents are employing. Others take much longer to correctly infer their opponent’s behavior,” Christian Ruff observes.
Social brain network becomes active
Using functional magnetic resonance imaging, the researchers were able to identify a distributed network encompassing several regions of the brain that shows increased activity whenever subjects rethink their estimation of their opponent.
The temporoparietal cortex, which plays a vital role in contemplating the thoughts and intentions of others, is particularly important here, as is the dorsomedial prefrontal cortex, which is involved in appraising social information.
The anterior insula and adjacent areas of the ventrolateral prefrontal cortex also exhibit a spike in activity, particularly when expectations turn out wrong and a reassessment becomes necessary. “In these moments, activity in those areas of the brain measurably changes,” explains Gökhan Aydogan, a postdoctoral researcher at the University of Zurich’s Department of Economics.
Social adaptation becomes predictable
What matters is that these activity patterns make it possible to predict how much a person adapts their estimation.
“This prediction worked even with subjects whose brain data had not yet been added to the model,” Ruff says.
The researchers thus speak of a neural fingerprint of adaptive mentalization. Prediction was successful with almost 90% of the study participants.
Previous research had examined social cognition mostly through static tasks such as short stories or single decisions. The new study, in contrast, utilized dynamic interactions that are more similar to those in everyday life. The study shows that mentalization is not a static state, but rather an ongoing adaptation process.
“Our findings may help to apprehend social cognition abilities more objectively in the future,” Ruff says. This is particularly pertinent for neurological disorders such as autism or borderline personality disorder that hamper social interactions.
“Neural markers of this kind may also help in the long run to evaluate and further develop therapies in a more targeted manner,” Ruff adds.
Key Questions Answered:
A: It’s all in the speed of your “social update.” This study shows that “good” socializers have a brain network that re-calibrates almost instantly when an opponent changes tactics. If you take longer to “size up” a new strategy, your temporoparietal cortex might just be taking a slightly more scenic route to process that social data.
A: Yes. The researchers tested participants against both. While the “adaptive mentalization” network is active in both cases, the brain generally works harder to figure out a human’s unpredictable intentions than a machine’s logic. Our social hardware is specifically tuned for the complexity of other people.
A: In a way, yes. Because this “neural fingerprint” was 90% accurate in predicting behavior, scientists could theoretically use a quick brain scan to see how effectively someone processes social information. This would be incredibly helpful for people with autism or other conditions who want an objective way to track their progress in social therapy.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal paper reviewed in full.
- Additional context added by our staff.
About this social neuroscience research news
Author: Nathalie Huber
Source: University of Zurich
Contact: Nathalie Huber – University of Zurich
Image: The image is credited to Neuroscience News
Original Research: Open access.
“A neural fingerprint of adaptive mentalization” by Niklas Buergi, Gökhan Aydogan, Arkady Konovalov & Christian C. Ruff. Nature Neuroscience
DOI:10.1038/s41593-026-02219-x
Abstract
A neural fingerprint of adaptive mentalization
Mentalization, inferring others’ emotions and intentions, is crucial for human social interactions and is impaired in various brain disorders. While previous neuroscience research has focused on static mentalization strategies, we know little about how the brain adaptively selects which strategies to use at any given moment.
Here we investigate this core aspect of mentalization with computational modeling and functional magnetic resonance imaging (fMRI) during interactive strategic games. We find that most participants can adapt their strategies to the changing sophistication of their opponents, though there are considerable individual differences.
Model-based fMRI analyses identify a distributed brain network in which activity and connectivity track this mentalization-belief adaptation. The extent to which people update their beliefs about others’ sophistication can be predicted out of sample from neural activity, providing a neural signature of adaptive mentalization.
Our model elucidates the neural basis of mentalization ability and provides a method for assessing these capabilities in healthy and clinical populations.
