Visuospatial and verbal working memory load: effects on visuospatial vigilance
Visuospatial and verbal working memory load: effects on visuospatial vigilance
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DOI：
10.1007/s00221-012-3322-2
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发表时间：
2013-02-01
影响因子：
2
通讯作者：
Russell, Paul N.
中科院分区：
文献类型：
--
作者：
Helton, William S.;Russell, Paul N.
在这项研究中，我们研究了并发的言语和视觉空间的工作记忆的要求，视觉空间连续目标检测任务的性能的影响。304名参与者进行了视觉空间警戒任务，同时进行空间或口头工作记忆任务，要么需要在守夜过程中的记忆负荷或不需要在守夜过程中的记忆负荷。同时存在的记忆负荷（言语和视觉空间）会降低对警惕目标刺激的感知敏感度A'。知觉灵敏度下降警惕目标，警惕递减，是陡峭的视觉空间记忆任务比言语记忆任务，无论并发的记忆负荷。警觉性检测试验后的记忆性能是视觉空间比口头项目低得多，即使警觉性检测试验前的记忆性能是视觉空间比口头项目高。总之，这表明当视觉空间警觉任务与视觉空间记忆任务配对时，比与言语记忆任务配对时干扰增加。总体而言，视觉空间和言语工作记忆负荷都影响警觉目标检测，这表明利用共同的执行资源。然而，可能存在特定于域的干扰，并且这可能在两个视觉空间任务中加剧。
In this study, we examined the impact of concurrent verbal and visuospatial working memory demands on performance of a visuospatial successive target detection task. Three hundred and four participants performed a visuospatial vigilance task while simultaneously performing either a spatial or verbal working memory task that either required a memory load during the vigil or did not require a memory load during the vigil. Perceptual sensitivity A' to vigilance target stimuli was reduced by concurrent memory load, both verbal and visuospatial. The decline in perceptual sensitivity to vigilance targets, the vigilance decrement, was steeper for a visuospatial memory task than a verbal memory task, regardless of concurrent memory load. Memory performance after vigilance detection trials was much lower for visuospatial than verbal items, even though memory performance before vigilance detection trials was higher for visuospatial than verbal items. Together, this indicates increased interference when a visuospatial vigilance task is paired with a visuospatial memory task, than when paired with a verbal memory task. Overall, the visuospatial and verbal working memory loads both impacted vigilance target detection, suggesting utilization of common executive resources. There may, however, be domain specific interference, and this may be exacerbated for two visuospatial tasks.