Capacity limits in visual short-term memory for local orientations
Capacity limits in visual short-term memory for local orientations
复制标题
局部方向视觉短期记忆的容量限制
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
G. Humphreys
中科院分区：
文献类型：
--
作者：
Jean;J. Braithwaite;M. Riddoch;G. Humphreys
我们使用变化检测范式来评估空间配置对单一特征的视觉短时记忆(VSTM)能力的影响，这些特征包括线条元素的方向或纹理，这些项目要么单独呈现，要么被圆圈包围。圆圈被认为是为了抑制显示器中刺激产生的整体构型。我们证明，当对构型信息的支持最小化(通过添加圆圈)时，VSTM容量选择性地被线条定向干扰，并且这种干扰效应在较大的显示尺寸时增加。相反，我们发现线条纹理的内存容量有限，无论圆圈是否被呈现来扰乱线条到更全局的配置的编码。从这些观察中我们得出结论，基于全局空间构型的单个视觉项目的关系信息被存储在VSTM中，并且在某些情况下可能增加VSTM的容量。我们从VSTM中形式的全局性质和局部性质的表示的角度讨论了结果。
We used a change detection paradigm to assess the effect of spatial configuration on visual short-term memory (VSTM) capacity for single features such as orientation or texture of line elements, with the items either being presented alone or surrounded by circles. Circles were assumed to suppress the global configuration made by the stimuli in a display. We demonstrated that when the support of configural information was minimized (by the addition of circles), VSTM capacity was selectively disrupted for line orientation, with this disruptive effect increasing at the larger display sizes. In contrast, we found capacity limits on memory for line texture irrespective of whether circles were presented to disrupt the coding of lines into a more global configuration. We conclude from these observations that the relational information of individual visual items, based on global spatial configuration, is stored in VSTM and may, in some cases, increase the capacity of VSTM. We discuss the results in terms of the representation of global and local properties of forms in VSTM.