Zhang Yin, Ye Chaoxiong, Roberson Debi, Zhao Guang, Xue Chengbo, Liu Qiang
1 Research Center of Brain and Cognitive Neuroscience, Liaoning Normal University, Dalian, China.
2 Department of Computer Science and Information Systems, University of Jyvaskyla, Jyvaskyla, Finland.
Q J Exp Psychol (Hove). 2018 Mar;71(3):749-758. doi: 10.1080/17470218.2016.1276943. Epub 2018 Jan 1.
Previous research has demonstrated that visual working memory performance is better when visual items are allocated in both left and right visual fields than within only one hemifield. This phenomenon is called the bilateral field advantage (BFA). The BFA is thought to be driven by an enhanced probability of storage, rather than by greater precision. In the present experiments, we sought to test whether the BFA can also extend to precision when the parameters of the task are modified. Using a moderate number of to-be-remembered items and 400 ms presentation time, we found better precision in the bilateral condition than in the unilateral condition. The classic BFA was still found in the form of an enhanced probability of storage, when presentation time was 200 ms. Thus, the BFA appears to convey both enhanced precision and greater probability of storage. The BFA is most likely due to the allocation of more attentional resources, when items are presented in both left and right visual fields.
先前的研究表明，当视觉项目分配在左右视野时，视觉工作记忆表现比仅在一个半视野内时更好。这种现象被称为双侧视野优势（BFA）。BFA被认为是由存储概率的提高驱动的，而不是更高的精度。在本实验中，我们试图测试当任务参数改变时，BFA是否也能扩展到精度方面。使用适量的待记忆项目和400毫秒的呈现时间，我们发现双侧条件下的精度比单侧条件下更好。当呈现时间为200毫秒时，经典的BFA仍以存储概率提高的形式出现。因此，BFA似乎既传达了更高的精度，又有更大的存储概率。当项目在左右视野中呈现时，BFA很可能是由于分配了更多的注意力资源。
