Huang Ann, Pink Mathis, Zemliak Viktoria, Czeszumski Artur, König Peter
Institute of Cognitive Science, University of Osnabrück, Wachsbleiche 27, 49090, Osnabrück, Germany.
Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland.
Sci Rep. 2025 Apr 3;15(1):11420. doi: 10.1038/s41598-025-96182-5.
How do we interact with our environment and make decisions about the world around us? Empirical research using psychophysical tasks has demonstrated that our perceptual decisions are influenced by past choices, a phenomenon known as the "choice history bias" effect. This decision-making process suggests that the brain adapts to environmental uncertainties based on history. However, single-subject experiment task design is prevalent across the work on choice history bias, thus limiting the implications of the empirical evidence to individual decisions. Here, we explore the choice history bias effect using a dual-participant approach, where dyads perform a shared perceptual decision-making task. We first propose two competing hypotheses: the participants equally weigh their own and their partner's decision history, or the participants do not weigh equally their own and their partner's decision history. We then use a statistical modeling approach to fit generalized linear models to the choice data in a series of steps and arrive at a model that best fits the observed data. Our results indicated that the own and partner's trial history cannot be treated independently. The findings suggest an interaction of actor and decision at 1-back, leading to a choice alternation bias after a partner's decision in contrast to a choice repetition bias after an own decision. A similar effect is observed at 2-back, in addition to an additive choice repetition bias of similar size. The effects of actor and decision at 2-back do not depend on the properties of the 1-back trial. Together, these findings support the idea that the participants do not ignore their partner's decisions but treat these qualitatively differently from their own.
我们如何与环境互动并对周围的世界做出决策？使用心理物理学任务的实证研究表明，我们的感知决策会受到过去选择的影响，这一现象被称为“选择历史偏差”效应。这种决策过程表明，大脑会根据历史来适应环境的不确定性。然而，在关于选择历史偏差的研究中，单主体实验任务设计很普遍，因此将实证证据的影响局限于个体决策。在这里，我们采用双参与者方法来探究选择历史偏差效应，即两人一组执行一个共享的感知决策任务。我们首先提出两个相互竞争的假设：参与者对自己和伙伴的决策历史同等重视，或者参与者对自己和伙伴的决策历史重视程度不同。然后，我们使用一种统计建模方法，分一系列步骤将广义线性模型拟合到选择数据上，得出一个最适合观测数据的模型。我们的结果表明，自己和伙伴的试验历史不能被独立对待。研究结果表明，行动者和决策在回溯一步时存在相互作用，导致在伙伴做出决策后出现选择交替偏差，而在自己做出决策后出现选择重复偏差。在回溯两步时也观察到了类似的效应，此外还有一个大小相似的相加性选择重复偏差。回溯两步时行动者和决策的效应并不取决于回溯一步试验的性质。总之，这些发现支持了这样一种观点，即参与者不会忽视伙伴的决策，而是对这些决策的处理方式与自己的决策在性质上有所不同。
