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首页> 美国卫生研究院文献>Frontiers in Neuroscience >Briefly Flashed Scenes Can Be Stored in Long-Term Memory
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Briefly Flashed Scenes Can Be Stored in Long-Term Memory

机译：短暂闪烁的场景可以存储在长期记忆中

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The capacity of human memory is impressive. Previous reports have shown that when asked to memorize images, participants can recognize several thousands of visual objects in great details even with a single viewing of a few seconds per image. In this experiment, we tested recognition performance for natural scenes that participants saw for 20 ms only once (untrained group) or 22 times over many days (trained group) in an unrelated task. 400 images (200 previously viewed and 200 novel images) were flashed one at a time and participants were asked to lift their finger from a pad whenever they thought they had already seen the image (goo-go paradigm). Compared to previous reports of excellent recognition performance with only single presentations of a few seconds, untrained participants were able to recognize only 64% of the 200 images they had seen few minutes before. On the other hand, trained participants, who had processed the flashed images (20 ms) several times, could correctly recognize 89% of them. EEG recordings confirmed these behavioral results. As early as 230 ms after stimulus onset, a significant event-related-potential (ERP) difference between familiar and new images was observed for the trained but not for the untrained group. These results show that briefly flashed unmasked scenes can be incidentally stored in long-term memory when repeated.
机译：人类记忆的能力令人印象深刻。以前的报告显示，当被要求记住图像时，即使一次查看每幅图像只有几秒钟，参与者也可以识别出数千个视觉对象。在此实验中，我们测试了自然场景的识别性能，参与者在无关的任务中仅看到20毫秒一次（未经训练的组），或者经过22天多次看到（经过训练的组）。一次闪烁400张图像（以前查看过200张图像，另外200张新颖图像），并且要求参与者以为自己已经看过图像（合格/不合格范例）时就将手指从触摸板上抬起。与以前只有几秒钟的单个演示的出色的识别性能报告相比，未经培训的参与者只能识别几分钟前看到的200张图像中的64％。另一方面，经过培训的参与者已经多次处理了闪烁的图像（20毫秒），可以正确识别其中的89％。脑电图记录证实了这些行为结果。早在刺激发作后230毫秒，对于受过训练的组，但未受过训练的组，在熟悉的图像和新图像之间观察到了显着的事件相关电位（ERP）差异。这些结果表明，重复出现时，短暂闪光的未遮盖场景可以偶然存储在长期存储器中。

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