注意分配的集中-分散倾向对重复知盲和注意瞬脱的影响

The Effects of Focus-Diffusion Trend in Attention Distribution on Repetition Blindness and Attentional Blink

为探讨注意分配的集中-分散倾向对重复知盲与注意瞬脱的影响,随机选取75名被试,完成整体/局部加工任务以及快速系列呈现(Rapid Serial Visual Presentation,RSVP)任务.按照整体/局部加工任务中局部干扰的分数排序,在分数两端分别选取24名被试作为注意集中组和注意分散组被试.对两组被试的瞬脱和知盲的效应量以及目标刺激的报告率进行分析发现:对于注意集中组而言,重复知盲与注意瞬脱呈显著的负相关,而对于注意分散组而言,重复知盲与注意瞬脱不相关;注意集中-分散倾向对非重复条件下T2的正确率影响不显著,而对重复条件下C2的正确率影响显著,注意集中组C2的报告率较低,注意集中组对C1的报告率高于注意分散组.该结果表明,lag2条件下重复知盲在某种程度上是T2报告率在瞬脱基础上的进一步降低,重复知盲的产生发生在报告阶段.结果支持重复知盲的竞争假设以及注意资源分配最优化假设.

In order to discuss the impacts of focus-diffusion trend in attention distribution on repetition blindness and attentional blink, 75 subjects are chosen to complete global/local processing and RSVP tasks. According to the score sorting of local interference in global/local processing task, 24 subjects are selected at the two ends of the score as the focused attention group and diffused attention group respectively. The results show that repetition blindness is negatively correlated with attentional blink for the focused attention group, whereas there is no significant relationship between them for the diffused attention group. The focus-diffusion trend of attention distribution has no significant effect on unrepeated T2, but it has significant effect on repeated C2. The accuracy of C2 for the focused attention is lower than it for the diffused attention group, while the result of C1 is vice versa. It is indicated that the repetition blindness under lag2 condition is the further reduction of T2 accuracy on the basis of blink, the production of repetition blindness occurs in the report stage. These findings are consistent with the competition hypothesis and the optimal allocation of attention resources hypothesis.