Am I the only person in the world to have never heard about this illusion/experiment? Seems so. Well now I know and I thought I’d share with you …..
In the late 90s Christopher Chabris and Daniel Simons produced a video of two teams passing a basketball around and most viewers failed to spot a gorilla with a walk on part. Now Simons has produced a sequel in which the gorilla makes an appearance but a number of other events take place too. Most people (who knew about the original video!) are looking out for the gorilla now but, even though they know there are some other occurrences, fail to spot them.
How do you do?
I spotted the gorilla but totally missed the other changes. I’m guessing that I would have missed the gorilla in the original….
Interestingly enough, in tests with this new video, about half of those who didn’t know about the gorilla failed to see it. Only 17% of people familiar with the gorilla thing noticed any of the other changes.
This is a great quote from Simons, which I believe has meaning in our lives way beyond videos about basketball and gorillas:
“… knowing that unexpected events might occur doesn’t prevent you from missing unexpected events.”
So I liked that and it prompted me to look for more examples (on YouTube of course, where else?). I found another video by Daniel Simons, this time with Daniel Levin. In this video the participant fails to notice that the person he is talking to is replaced by someone else (uh?) – watch it, it’s true!
A great example of change blindness in action.
Or, you could think of it a SEP (Somebody Else’s Problem) a phenomenon skillfully described by Douglas Adams in “Life, the Universe & Everything”, if you like that sort of thing
“An SEP is something we can’t see, or don’t see, or our brain doesn’t let us see, because we think that it’s somebody else’s problem…. the brain just edits it out, it’s like a blind spot. If you look at it directly you won’t see it unless you know precisely what it is. Your only hope is to catch it by surprise out of the corner of your eye.
….. this is because it relies on people’s natural predisposition not to see anything they don’t want to, weren’t expecting or can’t explain.”
Tracy

