Theatre Design & Technology - Winter 2013 - 12
subtext
by beeb salzer
thinking
about
thinking
Over the years, many students have come to me to report a startling fact they had discovered. My granddaughter told me that
her middle school science teacher told his class the same thing:
that we only use 10 percent of our brains. Balderdash. The persistence of this myth joins the stories of alligators in the New
York sewers, that aliens from space are among us, and that the
world will end on a date certain.
Yes, we only use a small percentage of our brain for conscious thought while the rest is doing all those jobs we are not
aware of: our heart beating, our stomach digesting, our limbs
moving, our cells fighting off disease. When we reach for a pencil or a glass, we are not aware of thinking about it. And even
if there are strange adaptations in nature, evolution has never
produced any part of a creature that is not useful. Over a zillion
years, our residual tailbone has almost disappeared.
10
theatre design
& technology
w i n t e r 2013
Not only that, our brains are constantly editing out many
messages our senses deliver. Anyone who has made recordings
and was surprised at the roar of ambient sounds on the recordings that they hadn't noticed before, knows this phenomenon.
A famous experiment demonstrated how we filter out information. Daniel Simons and Christopher Chabris filmed two
groups of people passing basketballs; one group had white
shirts, the other black. Subjects were asked to count the number of times the white shirts passed the basketball. While the
ball was being passed, a man in a gorilla suit walked right
through the middle of the picture. Most of the subjects were so
intent on counting the passes that they didn't see the gorilla. A
copy of the selective attention test video can be viewed on the
University of Illinois Visual Cognition Lab's website at viscog.
beckman.illinois.edu/grafs/demos/15.html.
Another example is an experiment where a man stops
a stranger to ask directions. While they are talking, two rude
workmen pass right between them carrying a door. Hidden behind the door is another man who replaces the first stranger.
The subject most often fails to notice that he is talking to a different person. This is called change blindness.
Theatre designers instinctively use the same sort of slight
of hand to focus attention. Like M. Jourdain in Le Bourgeois
Gentilhomme, who was delighted to find he was speaking
prose, designers mostly don't think much about the tricks they
play. Making a fat person look thinner, or vice versa, or hiding a
http://beckman.illinois.edu/grafs/demos/15.html
Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 2013
Contents
Theatre Design & Technology - Winter 2013 - 1
Theatre Design & Technology - Winter 2013 - 2
Theatre Design & Technology - Winter 2013 - 3
Theatre Design & Technology - Winter 2013 - Contents
Theatre Design & Technology - Winter 2013 - 5
Theatre Design & Technology - Winter 2013 - 6
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