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Surrogate Medical Choices Elevate Decision Thresholds and Tighten Gaze-Choice Coupling
Yan-Bang Zhou1, Ya-Ru Bu2, Xiao-Cao Zhou3
1School of Philosophy and Sociology, Lanzhou University.
Health Communication
|June 10, 2026
Summary
When making medical decisions for others, people become more cautious, prioritizing survival over comfort. This shift involves heightened attention to life-extending information and stronger links between what they see and their choices.
Area of Science:
- Decision Science
- Cognitive Psychology
- Medical Ethics
Background:
- Surrogate medical decision-making often prioritizes life preservation, but the underlying cognitive mechanisms are not fully understood.
- Understanding these mechanisms is crucial for improving end-of-life care and patient-centered communication.
Purpose of the Study:
- To investigate the cognitive processes involved in surrogate medical decision-making.
- To examine how assuming a surrogate role influences decision thresholds, attention, and choice behavior.
Main Methods:
- A within-subject eye-tracking experiment where participants made choices between treatments for themselves or others.
- Treatment options contrasted expected survival with weekly burden.
- Diffusion model analysis and eye-tracking metrics were used to analyze decision strategies and attentional patterns.
Main Results:
- Under "other-framing," participants made fewer comfort-favoring choices and had longer response times.
- Diffusion modeling indicated increased boundary separation, suggesting heightened caution.
- Eye-tracking revealed an attentional shift towards survival information and stronger gaze-choice coupling.
Conclusions:
- Surrogate decision-making is characterized by elevated decision thresholds, prioritizing survival information, and enhanced perception-action coupling.
- Findings suggest communication strategies for preference-concordant care, emphasizing transparent presentation of trade-offs and patient values.
