visual task

基本解释

If people are focusing strongly on a visual task, this will reduce the awareness of stimuli in other senses.
人们注意力高度集中在视觉任务上，那么对由其它感官带来的刺激的敏感度就会降低。
The researchers found that they were far less likely to hear the tone while performing the more difficult visual task, even when it was played on its own.
结果研究人员发现，当参与者专心于更困难的视觉性任务时，其注意到这些声音的概率大大降低，哪怕这些声音是单独播放的，也不例外。
While most participants' performances on the visual task declined over time, the performance by the group that was asked to respond to the digits while in the midst of the task did not.
研究人员发现，大部分测试者随着重复性工作的延续表现情况下降，而在测试过程中被要求对数字做出反应的小组人群表现依旧良好。

Then, the facial expressions of women were recorded they performed a visual task and were simultaneously exposed to the sweat samples.
FORBES: Yes, You Really Can Smell Emotions
The women also showed altered behavior in their visual search task when they were exposed to the chemosignals, but had no awareness of any change in their expression or behavior.
FORBES: Yes, You Really Can Smell Emotions