Kimura Motohiro, Katayama Jun'ichi, Murohashi Harumitsu
Graduate School of Education, Hokkaido University, Sapporo, Japan.
Neuroreport. 2008 Feb 12;19(3):389-92. doi: 10.1097/WNR.0b013e3282f55713.
In event-related brain potential studies using a visual S1-S2 matching task, stimulus changes elicit change-related positivity, which reflects the detection of visual changes. To investigate the effects of attention on change detection, we tested the elicitation of change-related positivity in response to changes in color and spatial frequency under three attention conditions: (i) changes in an unattended feature at an attended location, (ii) in an attended feature at an unattended location, and (iii) in an unattended feature at an unattended location. The results suggest that stimulus changes can be detected even when both feature and spatial attention are withdrawn, but change detection can also be inhibited, which might be because of biased-competition determined by the combination of feature and spatial attention conditions.
在使用视觉S1 - S2匹配任务的事件相关脑电位研究中，刺激变化会引发与变化相关的正波，这反映了对视觉变化的检测。为了研究注意力对变化检测的影响，我们在三种注意力条件下测试了对颜色和空间频率变化的与变化相关正波的诱发情况：（i）在被关注位置的未被关注特征的变化，（ii）在未被关注位置的被关注特征的变化，以及（iii）在未被关注位置的未被关注特征的变化。结果表明，即使特征和空间注意力都被撤回，刺激变化仍能被检测到，但变化检测也可能受到抑制，这可能是由于特征和空间注意力条件组合所决定的偏向竞争所致。
