Change Blindness

Also known as "Inattentional Blindness" is the inability to recognize visual changes that occur in your direct field of perception because you are paying attention to something else. An easy example would be something like not noticing that a street light changed colour even though you are looking right at it because you are listening to your friend talking to you. This is related to our ability to block out extraneous information and focus on specific stimuli. Which is advantageous when you are trying to listen to a single conversation in a noisy room, but not so good when you are called on to be a witness to a crime that happened right in front of you while you were busy. Some people have taught themselves to pay attention to specific stimuli above all else because it holds some special fascination for them. These are people who have a "good memory for faces/details/colours/bones/etc". And some people have trained themselves to be more conscious of changes in their surroundings in general, these are people who are "cops/spies/nosy/etc". Anyway, now that you are forewarned that that is what we're doing, here are a few good videos on the issue. Good times being nerdy!

First, here is one discussing an interesting experiment on the subject:

I know most of you have seen that awareness video with the ball passing and the bear (here). I think that it is a bit of cheating in these types of videos because they are it intentionally telling you to focus on something else to trick you. These types of awareness tests are easy if you ignore the "task" you are given and just watch normally:

But try and do the task AND find the change. It's still hard to do even if you know to be looking for something crazy. It's so hard to focus on two things! This one is a good one because it is just distracting you instead of actively telling you to do something else:

Here is a good one done by the same city of London bike safety guys to do the moonwalking bear mentioned above. These series of ads were to raise awareness of people's lack of awareness of cyclists on the road. McShanty points if you find more than 3 changes (the bear turning into a suit of armor doesn't count because it's too obvious, find a harder one dang it!). This one is tough because even though you know to look for the changes, a lot is happening at once and you don't know where the changes will occur so it is hard to know where focus your attention. FYI there are 21 changes during the course of the video.

p.s. Without looking, did you see a red wagon behind the gorilla on the picture at the top of the post? Did you have to look before you knew the answer?