Space, time and number are key dimensions that underlie how we perceive, identify and act within the environment. They are interconnected in our behaviour and brain. In this study, we examined interdependencies between these dimensions. To this end, left- and right-handed participants performed an object collision task that required space–time processing and arithmetic tests that involved number processing. Handedness of the participants influenced collision detection with left-handers being more accurate than right-handers, which is in line with the premise that hand preference guides individual differences as a result of sensorimotor experiences and distinct interhemispheric integration patterns. The data further showed that successful collision detection was a predictor for arithmetic achievement, at least in right-handers. These findings suggest that handedness plays a mediating role in binding information processing across domains, likely due to selective connectivity properties within the sensorimotor system that is guided by hemispheric lateralisation patterns.

空间、时间和数字是我们在环境中感知、识别和行动的关键维度。它们在我们的行为和大脑中相互关联。在这项研究中，我们检查了这些维度之间的相互依赖关系。为此，左撇子和右撇子参与者执行了一项需要时空处理和涉及数字处理的算术测试的物体碰撞任务。参与者的惯用手影响碰撞检测，左撇子比右撇子更准确，这与手部偏好引导个体差异作为感觉运动经验和不同的大脑半球整合模式的结果的前提是一致的。数据进一步表明，成功的碰撞检测是算术成就的预测指标，至少在右撇子中是这样。