Aguilar-Lleyda David, Tubau Elisabet, López-Moliner Joan
Vision and Control of Action (VISCA) Group, Department of Cognition, Development and Psychology of Education, Institut de Neurociències, Universitat de Barcelona, Barcelona, Catalonia, Spain.
Present address: Centre d'Économie de la Sorbonne (CNRS & Université Paris), Paris, France.
J Vis. 2018 Nov 1;18(12):12. doi: 10.1167/18.12.12.
Many tasks require synchronizing our actions with particular moments along the path of moving targets. However, it is controversial whether we base these actions on spatial or temporal information, and whether using either can enhance our performance. We addressed these questions with a coincidence timing task. A target varying in speed and motion duration approached a goal. Participants stopped the target and were rewarded according to its proximity to the goal. Results showed larger reward for responses temporally (rather than spatially) equidistant to the goal across speeds, and this pattern was promoted by longer motion durations. We used a Kalman filter to simulate time and space-based responses, where modeled speed uncertainty depended on motion duration and positional uncertainty on target speed. The comparison between simulated and observed responses revealed that a single position-tracking mechanism could account for both spatial and temporal patterns, providing a unified computational explanation.
许多任务需要我们将动作与移动目标路径上的特定时刻同步。然而，我们这些动作是基于空间信息还是时间信息，以及使用其中任何一种是否能提高我们的表现，这存在争议。我们通过一个同步计时任务来解决这些问题。一个速度和运动持续时间不断变化的目标朝着一个目标靠近。参与者停止目标，并根据其与目标的接近程度获得奖励。结果显示，在不同速度下，与目标在时间上（而非空间上）等距的反应获得的奖励更大，而且这种模式在运动持续时间较长时更为明显。我们使用卡尔曼滤波器来模拟基于时间和空间的反应，其中模拟的速度不确定性取决于运动持续时间，位置不确定性取决于目标速度。模拟反应与观察到的反应之间的比较表明，单一的位置跟踪机制可以解释空间和时间模式，提供了一个统一的计算解释。
