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A Neurocomputational Model of Observation-Based Decision Making with a Focus on Trust
Azadeh Hassannejad Nazir1,2,3, Jeanette Hellgren Kotaleski1,4, Hans Liljenström2,3
1Department of Neuroscience, Karolinska Institute, 17157 Solna, Sweden.
Brain Sciences
|May 27, 2026
Summary
Observing experts influences decisions by shaping trust and learning. This neurocomputational model shows how trust impacts emotional and rational decision-making processes.
Area of Science:
- Neuroscience
- Computational modeling
- Social psychology
Background:
- Human decision-making is influenced by social interactions and observing others.
- Neural structures like the orbitofrontal cortex (OFC), lateral prefrontal cortex (LPFC), and anterior cingulate cortex (ACC) are involved in processing social and decision-making information.
Purpose of the Study:
- To present a neurocomputational model of observational learning and trust in decision-making.
- To investigate how emotional and rational responses change when observing an expert's actions and outcomes.
- To provide a framework for understanding the interplay of social information, trust, and behavior.
Main Methods:
- Developed a neurocomputational model simulating the neurodynamics of OFC, LPFC, and ACC.
- Utilized Dynamic Bayesian Probability to model neural oscillatory properties representing observer attitudes.
- Generated EEG-like signals to analyze neural activity patterns during observation-based decision-making.
- Used transportation choice as a climate change-related behavioral example.
Main Results:
- Simulations indicate that increased trust enhances both emotional and rational evaluations when observing an expert.
- Neural activity patterns change during observation-based decision-making.
- The model demonstrates the dynamic interplay between emotional and cognitive processes in social decision-making.
Conclusions:
- Observational learning and trust are integral to shaping individual decision-making.
- The model offers mechanistic insights into how social information influences behavior through trust.
- Highlights the dynamic interaction between emotional and cognitive factors in social decision-making.
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