麻省理工学院Mehrdad Jazayeri小组近日取得一项新成果。经过不懈努力，他们研究出扣带皮层经验和观察的证据积累。这一研究成果发表在2026年1月7日出版的国际学术期刊《自然》上。

该研究组将他们的经历作为主题，以形成和更新关于世界隐藏状态的信念。如果可能的话，该研究团队也会通过观察他人来收集证据。

然而，大脑如何整合经验和观察证据还不清楚。课题组研究了一个具有易变隐藏状态的二人博弈中的证据整合动力学。在玩游戏和观察同伴时，人类和猴子都成功地更新了自己的信念，尽管在观察时效果较差。动物的电生理记录显示，前扣带皮层将独立的经验和观察证据整合为对环境状态动态信念的连贯神经表征。人口活动的几何形状揭示了这种整合的计算架构，并提供了经验和观察证据积累之间行为不对称的神经解释。这项工作为理解灵长类动物大脑社会背景下证据积累的神经机制奠定了基础。

附：英文原文

Title: Evidence accumulation from experience and observation in the cingulate cortex

Author: Chen, Ruidong, Radkani, Setayesh, Valluru, Neelima, Yoo, Seng Bum Michael, Jazayeri, Mehrdad

Issue&Volume: 2026-01-07

Abstract: We use our experiences to form and update beliefs about the hidden states of the world1,2,3. When possible, we also gather evidence by observing others. However, how the brain integrates experiential and observational evidence is not understood. We studied the dynamics of evidence integration in a two-player game with volatile hidden states. Both humans and monkeys successfully updated their beliefs while playing the game and observing their partner, although less effectively when observing. Electrophysiological recordings in animals revealed that the anterior cingulate cortex integrates independent sources of experiential and observational evidence into a coherent neural representation of dynamic belief about the environment’s state. The geometry of population activity revealed the computational architecture of this integration and provided a neural account of the behavioural asymmetry between experiential and observational evidence accumulation. This work lays the groundwork for understanding the neural mechanisms underlying evidence accumulation in social contexts in the primate brain.

DOI: 10.1038/s41586-025-09885-0

Source: https://www.nature.com/articles/s41586-025-09885-0