时间：5月14日 (周四)  18:00-20:00

地点：恕园28号楼205室

主题：工作进展和文献报告

1、工作进展：跨通道任务中预期对认知控制的影响及其神经机制

主讲：吕维潇 同学

2、文献汇报：基于特征的奖赏学习塑造人类的社会学习策略

主讲：汪朵颐 同学

3、文献汇报：遭受不公平经历之后情绪对第三方不公正决策影响的神经机制

主讲：文艺谚 同学

欢迎老师与同学们踊跃出席！

脑科学研究所

文献详细信息

1、题目： Feature-based reward learning shapes human social learning strategies  

期刊名称：Nature Human Behaviour   IF:15.9   SCI: Q1   中科院：1区

摘要：Human adaptation depends on individuals strategically choosing whom to learn from. A mosaic of social learning strategies—such as copying majorities or successful others—has been identified. Influential theories conceive of these strategies as fixed heuristics, independent of experience. However, such accounts cannot explain the flexibility and individual variability prevalent in social learning. Here we advance a domain-general reward learning framework that provides a unifying mechanistic account of pivotal social learning strategies. We first formalize how individuals learn to associate social features (for example, others’ behaviour or success) with reward. Across six experiments (n = 1,941), we show that people flexibly adjust their social learning in response to experienced rewards. Agent-based simulations further demonstrate how this learning process gives rise to key social learning strategies across a range of environments. Our findings suggest that people learn how to learn from others, enabling adaptive knowledge to spread dynamically throughout societies.

2、题目：Neural mechanisms of the mood effects on third-party responses to injustice after unfair experiences

期刊名称：Human Brain Mapping   IF: 4.4   SCI: Q1   中科院：2区

摘要：Behavioral decision theory argues that humans can adjust their third-party responses (e.g., punishment and compensation) to injustice by integrating unfair experiences. Typically, the mood plays an important role in such a decision-making process. However, the underlying neurocognitive bases remain largely unclear. We first employ a modified third-party justice game in which an allocator split an amount of money between oneself and a receiver. The participants can reapportion the money as observers by choosing from the following three costly options: compensate the receiver, accept the current allocation, or punish the allocator. Then, a second-party pseudo interaction is conducted where participants receive more (i.e., advantageous unfair experience) or less (i.e., disadvantageous unfair experience) than others. Finally, participants perform the third-party justice game again after unfair experiences. Here, we use functional near-infrared spectroscopy (fNIRS) to measure participants' brain activities during third-party responses to injustice. We find participants compensate more to the receiver after advantageous unfair experience, which involved enhanced positive emotion, weakened sense of unfairness, and is linked with increased activity in the right dorsolateral prefrontal cortex (rDLPFC). In contrast, participants punish more on the allocator after disadvantageous unfair experience, which might primarily stem from their negative emotional responses, strong sense of unfairness, and is associated with significantly decreased activity in the rDLPFC. Our results suggest that third-party compensation and punishment involved differential psychological and neural bases. Our findings highlight the crucial roles of second-party unfair experiences and the corresponding mood responses in third-party responses to unfairness, and unravel the intermediate neural architecture.