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视觉突出控制了大鼠基于价值的决策中的证据积累速度

Jensen A Palmer, Kevin Chavez Lopez, Mark Laubach

bioRxiv : the preprint server for biology

|November 24, 2025

概括

视觉暗示的突出性,而不仅仅是奖励价值,影响动物的决策. 刺激亮度的变化改变了决策速度和准确性,显示感知形状在基于价值的选择中积累了证据.

科学领域:

神经科学是一个神经科学.
决策科学决策科学决策科学
动物行为动物行为

背景情况:

基于价值的决策研究往往难以将提示的突出性与奖励价值分开.
了解感官感知如何影响选择行为至关重要.

研究的目的:

研究视觉暗示突出因素对大鼠基于价值的决策的独立影响.
区分感官感知和奖励价值在指导选择中的作用.

主要方法:

老鼠执行了两种替代的强制选择任务,具有不同的视觉暗示亮度和恒定的奖励值.
一个"亮度转移"测试引入了中间线索来评估感知相似性效应.
漂移扩散建模用于分析决策动态,特别是漂移速率和决策值.

主要成果:

尽管亮度发生了变化,但老鼠仍然喜欢更高价值的选项.
引入与感知相似的线索减少了选择偏好,并消除了延迟差异.
漂移扩散建模表明光度转移主要是减少漂移速率 (证据积累速度),而不是决策值.

结论:

视觉突出显著影响基于价值的决策中的证据积累效率.
低层次的感知特征塑造了选择的计算动态,与前额叶皮层的角色不同.
感官输入和认知控制 (前额叶皮层) 对决策过程有单独的,可识别的贡献.

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