Individuals with sequence-space synesthesia (SSS) perceive sequences like months, days and numbers in certain spatial arrangements. Several cognitive benefits have been associated with SSS, such as enhanced mental rotation, more vivid visual imagery and an advantage in spatial processing. The current study aimed to further investigate these cognitive benefits, focusing on spatial navigation skills, to explore if their enhanced sensitivity to spatial relations is reflected in enhanced navigational performance. Synesthetes were distinguished from controls by means of a questionnaire, a consistency test and drawings. A virtual Morris Water Maze (MWM) task with two allocentric and two egocentric navigation conditions was used to assess spatial navigation abilities. For the allocentric tasks, participants had to use object cues to find a hidden platform and for the egocentric tasks, they had to use their own position as a reference. Results showed that synesthetes performed significantly better compared to controls on the allocentric and egocentric tasks that reflected real life situations more accurately. However, this significant result was only found for the time taken to find the platform and not for the length of the path that was taken. In exploratory analyses, no significant relations were found between task performance and the specific features of the manifestation of each individual's synesthesia. Our hypothesis that synesthetes with the ability to mentally rotate their spatial arrangements would perform better on the allocentric task was not confirmed. Results add to the growing body of literature concerning the cognitive benefits of SSS and are consistent with the possibility that enhanced spatial navigation skills emerge from generally enhanced visuospatial abilities in SSS.

具有序列空间联觉（SSS）的个人在某些空间排列中会感知序列，例如月，日和数字。与SSS相关的一些认知优势包括增强的心理旋转能力，更生动的视觉形象以及空间处理方面的优势。当前的研究旨在进一步研究这些认知优势，重点是空间导航技能，以探索增强的导航性能是否反映了它们对空间关系的增强敏感性。通过问卷，一致性测试和绘图将同义物与对照区分开。一个虚拟的莫里斯水迷宫（MWM）任务具有两个同心向和两个以自我为中心的导航条件，用于评估空间导航能力。对于异形任务，参与者必须使用对象提示来找到隐藏的平台，对于以自我为中心的任务，他们必须使用自己的位置作为参考。结果表明，与同素异形和自我中心任务的对照相比，同合成物的表现明显更好，后者能更准确地反映现实生活中的情况。但是，仅在找到平台所花费的时间中发现了这一重要结果，而在所走路径的长度中却没有发现。在探索性分析中，在任务执行与每个人的联觉表现的特定特征之间没有发现显着的关系。我们的假设认为，具有精神上旋转其空间排列能力的合成物在同种异体功能方面的表现会更好。