Why is change detection so difficult in change blindness?

在变化盲视中，已知局部变化的检测是唯一困难的。在中枢神经系统中，由局部变化引起的刺激瞬变由大细胞神经元编码，已知其被红色选择性抑制。利用这一事实，在本研究中，变化检测进行了测试，不同的背景颜色的亮度相同（红色，绿色，灰色）。与传统的变化盲视实验不同，在本研究中，使用了一个简单的刺激配置与点排列在3个同心圆。有四个目标位置放置环而不是点，每个象限的视野。因此，变化事件是形式变化，其中四个环中的一个在呈现空白区域后变成了星星。在不同背景颜色下测量该变化检测的RT。为了使变化检测变得困难，通过单例（例如，星星的出现）被预先在目标环周围添加额外的恒星来防止。结果发现，当变化不产生单元素时（即，在每个环周围预先添加4颗星），当背景颜色为红色时，变化特别困难，尽管刺激区域（显示目标和噪声刺激的区域）被切掉以产生黑色甜甜圈区域。

In change blindness, detection of a local change is known to be uniquely difficult. In the central nervous system, stimulus transiency caused by a local change is coded by the magnocellur neurons, which is known to be selectively suppressed by red color. Taking advantage of this fact, in the present study, change detection was tested with different background colors of equal luminance (red,green,and gray). Unlike traditional change blindness experiments, in the present study, a simple stimulus configuration with dots arranged on 3 concentric circles was used. There were four target locations where rings rather than dots were placed, one in each quadrant of the visual field. Thus, the change event was form change, in which one of the four rings turned into a star after presentation of a blank field. RTs for this change detection was measured under different background colors. To make change detection difficult, attentional capture by singleton (e.g., appearance of star) was prevented with additional stars added in advance around the target rings. It was found that when change did not make a singleton (that is, 4 stars were added in advance around each ring) change was especially difficult when background color was red in spite of the fact that the stimulus area (those where targets and noise stimuli were displayed) was cut out to make a black doughnut area.