Saleri Lunazzi Clara, Thura David, Reynaud Amélie J
Lyon Neuroscience Research Center-Impact Team, Inserm U1028, CNRS UMR5292, Lyon 1 University, Bron, France.
Eur J Neurosci. 2023 Apr;57(7):1098-1113. doi: 10.1111/ejn.15932. Epub 2023 Feb 23.
Speed-accuracy trade-off adjustments in decision-making have been mainly studied separately from those in motor control. In the wild, however, animals coordinate their decision and action, often deciding while acting. Recent behavioural studies support this view, indicating that animals, including humans, trade decision time for movement time to maximize their global rate of reward during experimental sessions. Besides, it is well established that choice outcomes impact subsequent decisions. Crucially though, whether and how a decision outcome also influences the subsequent motor performance, and whether and how the outcome of a movement influences the next decision, is unclear. Here, we address these questions by analysing trial-to-trial changes of choice and motor behaviours in healthy human participants instructed to perform successive perceptual decisions expressed with reaching movements whose duration was either weakly or strongly constrained in separate tasks. Results indicate that after a wrong decision, subjects who were weakly constrained in their action duration decided more slowly and more accurately. Interestingly, they also shortened their subsequent movement duration by moving faster. Conversely, we found that errors of constrained movements influenced not only the speed and the amplitude of the following movement but those of the decision too. If the movement had to be slowed down, the decision that precedes that movement was accelerated and vice versa. Together, these results indicate that from one trial to the next, humans seek to determine a behavioural duration as a whole instead of optimizing each of the decision and action speed-accuracy trade-offs independently of each other.
决策中的速度 - 准确性权衡调整主要是与运动控制中的此类调整分开进行研究的。然而，在自然环境中，动物会协调它们的决策和行动，常常在行动过程中做出决定。最近的行为学研究支持了这一观点，表明包括人类在内的动物会在实验过程中用决策时间换取运动时间，以最大化其整体奖励率。此外，人们已经充分认识到选择结果会影响后续决策。然而至关重要的是，决策结果是否以及如何影响后续的运动表现，以及运动结果是否以及如何影响下一个决策，目前尚不清楚。在这里，我们通过分析健康人类参与者在执行连续的感知决策时的逐次试验选择和运动行为变化来解决这些问题，这些决策通过伸手动作来表达，在不同任务中伸手动作的持续时间要么受到微弱限制，要么受到强烈限制。结果表明，在做出错误决策后，行动持续时间受到微弱限制的受试者决策更慢且更准确。有趣的是，他们还通过更快地移动来缩短后续的运动持续时间。相反，我们发现受限运动的误差不仅影响后续运动的速度和幅度，也影响决策的速度和幅度。如果运动必须放慢，那么该运动之前的决策会加速，反之亦然。总之，这些结果表明，在逐次试验中，人类试图整体确定一个行为持续时间，而不是相互独立地优化决策和行动的速度 - 准确性权衡。
