EFFECT OF ATTENTIONAL LEVEL ON REPRESENTATION OF OBJECTS IN VISUAL WORKING MEMORY
注意水平对视觉工作记忆客体表征的影响

By using the single-probe change detection paradigm and a divided-attention proc edure, two experiments were conducted in the present study to investigate the ef fects of feature dimension and attentional level on the representation of object s in visual working memory. Fourteen undergraduate volunteers participated in th e first experiment, which was designed to examine whether features within the sa me dimension could be represented based on object, and whether such kind of repr esentation was influenced by attentional level. In the second experiment, eight shapes and colors were combined into objects consisting of features from differe nt dimensions. The representation form of such objects and the role of attention were examined. The results showed: (1) Objects defined by features from the sam e dimension were stored automatically with single feature as unit in visual work ing memory even in single probe condition. (2) Objects composed of features with in different dimensions could be represented in integrated object form which dem anded engagement of focused attention. (3) The storage of integrated information during perception stage in working memory also consumed attention resource.