次要任务对词类判断任务中权力空间表征激活的影响

许多证据表明权力在大脑中是以垂直空间来进行表征的, 具体而言为言语和视觉空间编码。前人研究发现两种编码具有情境依赖性, 即当前任务决定了激活哪种编码。一般的词类判断任务主要依赖于言语编码。然而仍不确定的是, 当排除言语空间编码后, 词类判断任务能否激活视觉空间编码。本研究拟借助双任务范式探讨此问题。实验结果发现单任务条件下出现权力-空间交互, 并且双任务条件下, 这一交互只受到视觉空间次要任务的干扰。这说明, 词类判断任务也可依赖视觉空间编码, 并进一步支持了权力空间表征的情境依赖性。

The effect of secondary task on power-space interactions during the performance of a semantic category judgment task

There is much evidence suggesting that power is represented as vertical space in our brain, specifically, verbal-spatial coding (amodal representation) and visuospatial coding (modal representation). Both codes are context-dependent, and the activation of which depends on the concurrent task. Studies using the dual-task paradigm have revealed that the explicit power judgment task activates both codes, whereas the semantic category judgment task mainly activates the verbal-spatial codes. However, it is still unclear whether the semantic category judgment task can activate the visuospatial codes when excluding the verbal-spatial codes. Thus, the aim of the present study is to explore whether the semantic category judgment task can activate the visuospatial codes when excluding verbal-spatial information.