I conducted three experiments to investigate haptic working memory capacity using a haptic change detection task with 2D stimuli. I adopted a single-task paradigm comprising haptic single-feature (orientation or texture) and haptic multifeature (orientation and texture) conditions in Experiment 1 and a dual-task paradigm with a primary haptic orientation or texture change detection task and a concurrent secondary visual shape or colour change detection task in Experiments 2-3. I observed that in the single-task paradigm, haptic change detection capacity was higher for single features than it was for multiple features. In haptic working memory, unlike in visual working memory, features of two different dimensions within an object cannot be integrated. In the dual-task paradigm, interference was observed when the concurrent visual shape change detection task was combined with the haptic orientation change detection task although interference was not observed when the concurrent visual colour change detection task was combined with it. In addition, the concurrent visual shape or colour change detection task did not interfere with the capacity for haptic texture memory, which was higher than that for haptic orientation memory. These findings demonstrate that geometric properties perhaps retained a common storage system shared between haptic working memory and visual working memory; however, haptic texture might be retained in an independent stable storage system that is haptic-specific.

中文翻译：

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触觉工作记忆能力的本质及其与视觉工作记忆的关系。

我进行了三个实验，以使用带有2D刺激的触觉变化检测任务来研究触觉工作记忆能力。我在实验1中采用了包含触觉单特征（方向或纹理）和触觉多特征（方向和纹理）条件的单任务范式，以及具有主要触觉取向或纹理变化检测任务和同时发生的次级视觉的双任务范式实验2-3中的形状或颜色变化检测任务。我观察到，在单任务范例中，单个功能的触觉变化检测能力高于多个功能。在触觉工作记忆中，与视觉工作记忆不同，无法集成对象内两个不同维度的特征。在双任务范式中，并发视觉形状变化检测任务与触觉方向变化检测任务相结合时，观察到干扰，尽管并发视觉颜色变化检测任务与触觉方向变化检测任务相结合时没有观察到干扰。此外，同时进行的视觉形状或颜色变化检测任务不会影响触觉纹理记忆的容量，该能力要高于触觉定向记忆的容量。这些发现表明，几何特性也许保留了在触觉工作记忆和视觉工作记忆之间共享的公共存储系统。但是，触觉纹理可能会保留在特定于触觉的独立稳定存储系统中。