探索-开发决策的动态表明,在老年人中减少随机探索的门机制
Caroline E Phelps1,2, Alec E Frisvold1, Meghna Sreeram1
1Department of Psychology, University of Arizona, Tucson, Arizona, United States of America.
PLoS computational biology
|December 16, 2025
概括
由于随机探索减少,年长的成年人比年轻的成年人少探索. 这种与年龄相关的探索差异是由更高的决策值驱动的,这可能会抵消老年人较低的信号噪声比率.
科学领域:
- 认知神经科学 认知神经科学
- 决策研究 决策研究
- 老龄化研究研究.
背景情况:
- 与年轻人相比,当面临选择时,老年人表现出较少的探索和更多的剥削.
- 这种与年龄相关的探索缺陷的潜在原因是减少"随机探索",这是由行为变化驱动的探索.
研究的目的:
- 用漂移扩散模型 (DDM) 调查随机探索中与年龄有关的差异背后的机制.
- 为了确定衰老中减少的随机探索是否与信号噪声比 (SNR) 或决策值有关.
主要方法:
- 使用漂移扩散模型 (DDM) 来分析探索-开发选择和响应时间.
- DDM与健康的年轻人和老年成年参与者的数据相匹配.
主要成果:
- 与年轻人相比,老年人显示信号与噪声比率 (SNR) 较低.
- 老年人也表现出比年轻人更高的决策值.
结论:
- 减少随机探索的衰老主要是由更高的响应值在老年人.
- 这些更高的值可能作为一个补偿机制,减少SNR在老化大脑的决策信息表现.
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