All of it. It's your attention that is divided, not your brain. :)
Oh, wait--if you're texting while driving you aren't using any of it.
c


On Mon, Feb 7, 2011 at 2:32 PM, Joan Warmbold <[email protected]> wrote:

>
>
> If I'm day dreaming about my plans for Valentine's Day while "listening" to
> a lecture, how much of my brain is being used to listen to the lecture?  If
> I'm texting while driving, how much of my brain am I using for driving?
>
> Joan
> [email protected]
>
> Carol DeVolder wrote:
>
>
> When this Spring semester began a few weeks ago, I gave a short pre-test to
> students in my 3rd-year level Brain and Behavior classes. One question read
> something like, "Generally we use _____." the answers were a. 10%, b. 20%,
> c. either the left half or the right half of the brain exclusively. d. our
> entire brain. Sadly, in two sections of approximately 30 students, a little
> over half chose an incorrect answer. This is after three years of college,
> and all of these students have had Intro Psych and I know they covered at
> least one chapter on biopsych in it. I didn't look at which item they chose
> most often, but I may go back and do just that. I wonder if I give it at the
> end of the semester I can compare and see an "improvement" from 10% (choice
> a) to 20% (choice b). Sigh...makes me want to bang my head against the wall.
>
> On Sun, Feb 6, 2011 at 9:41 PM, Mike Palij <[email protected]> wrote:
>
>> So, I'm watching the last couple of minutes of the Super Bowl (for
>> non-U.S.
>> Tipsters, it is a football [no, not soccer] game) and a commercial for a
>> new
>> movie comes on.  Now, I've tried to turn off my attention when commercials
>> come on but then I hear a voice over say something like "what if you could
>> use more than 20% of your brain?"  It is for a movie starring Bradley
>> Cooper
>> and Robert De Niro (Oh! How the mighty have fallen!) titled "Limitless".
>> My first response was "well, I hope those folks would stop making
>> commercials
>> like this" but I digress.  This was the first time I heard of people only
>> using 20%
>> instead of the traditional 10% (for debunking the 10% myth of brain usage,
>> see:
>> http://faculty.washington.edu/chudler/tenper.html
>> and/or
>> http://en.wikipedia.org/wiki/10%25_of_brain_myth )
>>
>> Now I'm wondering: "Did I mis-hear the commercial? Did they really say
>> 20% instead of 10%?"  A quick search of the InterWebs indicate that
>> indeed, we must be getting smarter because we are now using 20%.
>> Consider the following article that previews the movie "Limitless":
>>
>> http://www.guardian.co.uk/film/2010/dec/22/limitless-trailer-bradley-cooper
>>
>> So, if drugs can make you use more of your brain, clearly drugs are a
>> good thing (which is an argument I imagine used by undergraduates who
>> use provigil and adderall to keep pepped up during the semester).  In
>> any event, I guess we should expect students to ask about why we only
>> use 20% of our brains and have an answer prepared for them:
>>
>> "Only some people in Hollywood appear to use only 20% of their brains."
>>
>> -Mike Palij
>> New York University
>> [email protected]
>>
>>
>>
>>
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>
>
>
> --
> Carol DeVolder, Ph.D.
> Professor and Chair, Department of Psychology
> St. Ambrose University
> 518 West Locust Street
> Davenport, Iowa  52803
> 563-333-6482
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-- 
Carol DeVolder, Ph.D.
Professor and Chair, Department of Psychology
St. Ambrose University
518 West Locust Street
Davenport, Iowa  52803
563-333-6482

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