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I had the opportunity to hear Wes Fryer keynote today at the 1-1 Laptop Conference in Chicago. He used a stat that I have heard before and have debated a little.
The idea is:
"What we see travels to the brain 60X faster than what we hear"
We discussed it afterward because I have recently looked at that information for another presentation that I was working on. I think it should actually be:
"At any one time 60X more information can travel to the brain from the eyes than from the ears"
Did some research tonight to confirm my off the head numbers today and here is what I found...
Optical nerve fibers = 1,200,000
Several spots on the web - here it is from Wikipedia: http://en.wikipedia.org/wiki/Optical_nerve
Auditory nerve fibers - 20,000 - 30,000 depending on the source
wikipedia has it at 30K
At 20K you get the 60X number
1,200,000/20,000 = 60
That would just impact the amount of information that could be carried at any one time. It is all electrical impulses traveling somewhere between 66-96% of the speed of light (not sure of the speed through the human nerve - but those are the figures for electricity depending on the substance it is moving through). Since neither the eye or the ear are much further from each other, I am not sure it matters.
From: http://www.committedsardine.com/handouts/presentations/UDK.pdf by Ian Jukes, Ted McCain, and Lee Crockett
"30% or the nerve cells in the brain are dedicated to sight, while only 8% are for touch and a mere 3% for hearing"
I conclude the rest must be for touch/smell. So 73% of the sensory neurons we can reach during instruction are dedicated to sight.
There are some numbers out there that seem to imply the greater effectiveness of sight as a sensory source. Any brain researchers out there that want to weigh in on this one?
- Or -
Does anyone else have anything else out there to help confirm/deny this information and the actual true meaning of it all?