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  • Your eyes help you see the world, but you can't see this dot.

    你用眼睛看世界,但是你卻看不到這個點

  • No, seriously. If you close your left eye, stare at this cross here with your right eye,

    不,是真的。如果你閉上左眼,用右眼盯著這個十字

  • and slowly move your head towards or away from the screen,

    然後慢慢地把頭靠近(或遠離)螢幕

  • the dot will disappear, revealing the exact location of your blind spot.

    黑點會消失,而那就是你的盲點

  • The cells at the back of your eye transform light into signals that are sent to your brain.

    眼睛背後的細胞把光線轉換成訊號然後傳達到腦部

  • But they are missing right here, because this is where nerves and blood vessels connect to the eye.

    但是在這個地方剛好沒有這些細胞,因為這裡是神經跟血管跟眼睛連結的地方

  • So anything at that point in your vision, you can't see, aka your blind spot.

    所以在你視野當中,那個點裡的任何東西你都看不到(也就是盲點)

  • If we add a line through the image and you try again,

    如果我們在圖片中間加上一條線然後你再試一次

  • you'll notice that your brain fills in information and makes you think the line is continuous

    你會發現大腦幫你加上了資訊,讓你覺得這條線是連續的

  • instead of there being a hole in your vision.

    但是實際上你的視野有個缺口

  • You also can't see all twelve of these black dots at once for a similar reason.

    你無法同時看見這十二個黑點也是因為類似的原因

  • Go ahead and try.

    試試看啊

  • Chances are you'll only see a fraction of them at once.

    你應該一次只能看到一部份的黑點

  • The exact point your eye looks at is focused,

    你眼睛看的那個點是對焦的沒有錯

  • but your peripheral vision isn't great,

    但是你周邊的視野並沒有那麼好

  • and so your brain often makes assumptions for what's there.

    所以大腦會幫你猜旁邊是什麼東西

  • Because of the consistent gray line pattern,

    因為你看到規律的灰線圖形

  • your brain assumes the rest of the image is just like that and misses the black dots

    你的大腦直接斷定圖片剩下的部分都長一樣,所以你看不到黑點

  • until you look directly at them.

    除非你直接盯著黑點看

  • These two rectangles are flashing at a phase with each other, right?

    這兩個長方形輪流閃爍對嗎?

  • How about now?

    現在呢?

  • For most, the rectangles will now seem to be flashing at the same time in phase, but they aren't at all.

    大部分的人會覺得兩個長方形現在是同時閃爍的,但是根本不是這樣

  • And yet, if we move these shapes beside them just a few pixels,

    然而,如果我們把它們周圍的圖形移動一點點

  • you'll begin to see them out of phase again.

    你會看到它們開始不規則閃爍

  • The surrounding area has a direct impact on how you see and perceive things,

    (周圍)環境對你如何看以及感知東西有直接影響

  • even if the result isn't correct.

    即使結果是不正確的

  • Not convinced?

    不相信嗎?

  • Look at these flashing squares.

    看著這兩個閃爍的正方形

  • Except, what you may not have seen is that the middle square isn't flashing at all.

    你可能沒有發現中間的正方形根本沒有在閃爍

  • If we remove the outer square, we see it for what it is: a solid color.

    如果我們把外面的正方形拿掉就可以看得很清楚:它是一個沒有在動的正方形

  • Now, try reading the sentence inside it.

    讀讀看這個句子

  • Did you catch the extra word?

    有發現多了一個字嗎?

  • Your brain doesn't always notice mistakes like these because it doesn't affect your comprehension of the sentence,

    大腦並不會每次都抓出這種錯誤,因為它不會影響你理解這個句子

  • and your brain will prefer to act quickly rather than to be perfectly accurate.

    大腦會想要快速反應,而不是什麼東西都要完全精準

  • Try staring at the middle dot in this illusion.

    試試看盯著這個圖形中間的點

  • When the picture isn't moving, the colors are clearly changing quickly,

    當這個圖形沒有在移動時,旁邊的顏色明顯地在快速改變

  • yet when the image starts rotating, the color change either seems nonexistent or much slower.

    可是如果圖形開始旋轉,顏色的改變可能會消失或是變慢

  • Our eyes and brain have evolved to see,

    經過演化後,我們的眼睛跟大腦學會怎麼看東西

  • but our vision makes assumptions based on learning, memory, and expectation.

    但是我們的視野是根據學習、記憶以及預期(接下來會發生的事件)來做出判斷

  • And all of these illusions take advantage of this adaptation.

    以上看到的所有幻覺都是因為這個演化結果而產生的

  • It's an advantage to have rapid information-processing,

    擁有快速資訊處理能力是個優勢

  • so instead of taking in every bit of detail to be 100% accurate,

    所以與其注意每個細節並且完全精準的感知外在環境

  • which would cause a brain-overload,

    這會讓大腦資訊超載

  • your brain makes assumptions.

    你的大腦會自己下結論

  • This faster perception allows for faster reflexes and faster conscious and unconscious decisions,

    這個較快速的感知方式讓你可以更快的反應,也可以更快做出有意識/下意識的決定

  • an integral aspect of human nature, much like this halo,

    而這是人性重要的一環,就像這個圓環一樣

  • if you stare at the center spot for long enough, the brain will simply make it disappear.

    如果你盯著中間的點夠久,你的大腦會自動讓它消失

  • It makes an assumption that the information is unchanging or unimportant,

    它覺得這個資訊沒有在改變或是一點都不重要

  • and as a result, you can't see it.

    所以你才看不到它

  • Love tricking your brain with illusions?

    你也喜歡用這些幻覺來騙騙自己嗎?

  • We've put together a playlist of our favorite ones that you can watch by clicking the screen.

    點一下螢幕就可以看到我們幫你挑選的幻覺影片喔!

  • Don't forget to subscribe for more weekly fun science videos.

    別忘記訂閱我們的頻道就可以每個禮拜看到更多有趣的科學影片

Your eyes help you see the world, but you can't see this dot.

你用眼睛看世界,但是你卻看不到這個點

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我打賭你一定看不到這個! (You Can't See This (MIND TRICKS))

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    Tim 發佈於 2016 年 12 月 16 日
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