100 Things You Should Know about People: #1– You Have "Inattention Blindness"

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I’ve decided to start a series called 100 Things You Should Know about People. As in: 100 things you should know if you are going to design an effective and persuasive website, web application or software application. Or maybe just 100 things that everyone should know about humans!

The order that I’ll present these 100 things is going to be pretty random. So the fact that this first one is first doesn’t mean that’s it’s the most important.. just that it came to mind first.

I hope you enjoy this series. Make sure to let me know by posting comments.

So here’s #1 — Inattention Blindness

First let’s start with a little test for you to take. Watch the video below:

This is an example of what is called “inattention blindness” or “change blindness”. The idea is that people often miss large changes in their visual field. This has been shown in many experiments. Here is a description of an experiment conducted outside the lab:

So what does this mean if you are designing a website or something on a computer screen? It means that you can’t assume that just because something is on the screen means that people see it. This is especially true when you refresh a screen and make one change on it. People may not realize they are even looking at a different screen. Remember, just because something happens in the visual field doesn’t mean that people are consciously aware of it.

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Comments

32 responses to “100 Things You Should Know about People: #1– You Have "Inattention Blindness"”

  1. […] 100 Things You Should Know about People: #1– You Have “Inattention Blindness” What Makes Them Click […]

  2. Khoa Avatar

    I watched the bear movie before and still couldn’t believe that I missed that guy :-)

    Very interesting series. Thank you.

    Keep up with the good work.

    Khoa

  3. Leigh Avatar

    Really?

    I couldn’t count the passes at all — but as soon as I saw that guy I was all, WTF is that?

    Maybe it’s because it’s my job to see things other people miss.

    1. tyron Avatar
      tyron

      yeah really

    2. Isaac Avatar

      You saw the gorilla simply because you didn’t do the counting, otherwise we would be on the same whatsapp😂😂

  4. Pradip Khekare Avatar

    I never thought of this…seems this is going to be very interesting series!!!

  5. Zaheen Avatar

    Saw this on Copyblogger! I can’t wait to read the next 99!

    This website is going in my bookmarks. :-)

  6. Guillaume Avatar
    Guillaume

    Just discovered this series of article. This is fascinating.

    Thank you.

  7. Nathan Avatar
    Nathan

    Got the count correct, missed the bear. Had to watch it again. I love this kind of stuff.

  8. Kevin Hughes Avatar

    What a wonderful way to get people stoked about their minds and behavior! I did the first video a long time ago – except it was a gorilla suit that no one noticed. What fun. I think these short clips stimulate much more thought and discussion amongst folks just being introduced to new ideas. Great job! Loved it. Kevin

  9. PeanutButterJelly Avatar
    PeanutButterJelly

    this is the best totally missed the bear! :)

  10. David Mizener Avatar

    Got both wrong. The bear and count.

  11. […] following a chain of links while doing some research and I stumbled across an amazing article on inattentional blindness. I suggest you go check out the link before you read any […]

  12. Kirsten Avatar
    Kirsten

    I’m sure you’ve looked at this because seems an obvious question – any gender diff in who notices? Just interesting in video the people chosen

  13. Anthony Spence Avatar

    Interesting series, cant believe he missed though, lol. Going to bookmark and check back for updates

  14. Phil Avatar
    Phil

    This is a brilliant post, really looking forward to the rest! I have seen the first video before, and I missed the bear too. I find it incredible that 75% don’t notice, that’s insanely high!

  15. raju Avatar
    raju

    interesting…..thought provoking….
    raju.

  16. raju Avatar
    raju

    amazing….

  17. Naveed Avatar

    Change blindness… interesting concept

  18. Eric Avatar
    Eric

    I just bought the book “100 things every designer needs to know about people” the Taiwanese version here in Taiwan, so I followed this instruction to this page. This is a very nice book for me and for my team to know about the DESIGNING FOR THE PEOPLE through all these 100 things. Great!!

  19. 유리(yuri) Avatar
    유리(yuri)

    This is very interesting.
    It’s little bit confused to understand what this post says cause I’m Korean, but I know what the point is. Thanks! I’m looking forward to your another post :-)

  20. Laura Avatar
    Laura

    Very observant, thought provoking,interesting. As I was counting the passes, I did notice something moving in the opposite direction, but to me it was a blur and it didn’t register as anything but a moving blob of dark colors. When it was pointed out what that was and I focused on it, the moon-walking bear was a unique addition to prove the point that was being made. :D

  21. Alex Avatar
    Alex

    Very interesting! Iv followed the link “The Gorilla Video” from your book, counted all 13.5 passes and saw the Moon-walking Bear. But I was thinking that it was the Moon-walking Gorilla until I was told that its a bear XD

  22. Daniel Furze Avatar

    Ha this is so true! Great post, thanks.
    Currently reading your book and it’s great!
    :D

  23. heather Avatar
    heather

    currently reading “100 things every designer needs to know about people” which prompted me to watch the GORILLA VIDEO. Although the book mentioned it was a “gorilla video,” I was still fixated on counting the passes (thankfully got this right) but totally missed the gorilla. INATTENTION BLINDNESS is real and is an extremely helpful and tactful tip for designers.

  24. Wojtek Avatar

    I am reading the book and as instructed, came here to see the video. However, as of 2016, the vid is missing, instead of the embedded video a blank page shows. After checking the page source, here is the link to the gorilla video: https://www.youtube.com/v/Ahg6qcgoay4. Hope this helps.

  25. Catscarlet Avatar

    The second video is unavailable. Can it be fixed? or is there any way to watch it?

    1. Susan Weinschenk Avatar
      Susan Weinschenk

      Hello, I’ve updated the links so the videos work now. Thanks for letting me know!

  26. Anindya Sundar Biswas Avatar
    Anindya Sundar Biswas

    I counted correctly and saw the gorilla but ignored it, also tried to process other information such as the number of players, types of ball, other t-shirt colors and pants.
    My mental model was like this – I was asked to accomplish a task which immediately informed me of the context (i am reading a blog on design and cognition), alerted me that there must be other sub-task which I might miss and I became active to collect as much information I could.
    I am UX Designer and that could be a reason.

  27. Motolani Avatar
    Motolani

    I actually got the count and the gorilla correct!

  28. Pamela Avatar
    Pamela

    I saw the Gorilla and counted 14!

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