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Page 1
Sense Perception
Page 2
Question
Which person is more likely to see the Moon as it really is?
A person looking at the Moon from Earth?orAn astronaut looking at the Moon while standing on it?
Page 3
Question
Which person is more likely to see the Earth as it really is?
A person standing on the surface of the Earth?orAn astronaut looking at Earth from the Moon?
Page 4
I call it as I see it
The Snapshot model of perception
Common sense realism
•My senses capture information and my brain records it.
•And my memory recalls it when requested.
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Snapshot
•Colours, smells, objects exist
•Being observed does not change them
Empiricism – all knowledge is based on perception
Scientific method uses empirical observation
Page 6
The eye sucks
Image is upside down
Nearly colour blind
Terrible depth of field
It jumps & refocuses several times a second
It should look like a crappy home video!
Page 7
Why aren’t we living in a crappy home video?
Sensation – provided by the world via senses
Interpretation – provided by our brains
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We interpret data depending on the context, what we already know, our assumptions, our biology...
…data, information, knowledge…
…we tend to simplify the data stream and group it according to patterns we already recognise
Page 9
Optical illusions - pre-existing knowledge
Theory of Knowledge for the IB DiplomaRichard van de Lagemaat
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Optical illusions – background/forground
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Optical illusions – visual grouping
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Optical illusions – expectations
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Perception is constructed
Zen saying:
"If a tree falls in a forest and no one is around to hear it, does it make a sound?"
Page 14
Zennoying
"Two monks were arguing about the temple flag waving in the wind. One said, "The flag moves." The other said, "The wind moves." They argued back and forth but could not agree.The Sixth Ancestor said, "Gentlemen! It is not the wind that moves; it is not the flag that moves; it is your mind that moves." The two monks were struck with awe."- The Mumonkan Case 29, translation by Robert Aitken
Page 15
Zen saying:
"If a tree falls in a forest and no one is around to hear it, does it make a sound?"
What if I steal your fries and you don’t see it?
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Play video
Page 17
Perception is attention dependant
Changes that affectmeaning are more likelyto be noticed
We notice what mattersto us.
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Perception is culturally constructed
Gestalt
We simplify to what’s important
We percieve whole configurations
We put it in to context
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Perception is culturally constructed
Context
Would the world’s greatest violinist busk in a subway?
Joshua Bell
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Perception is culturally constructed
The Washington Post1,097 people walked byhardly anyone stoppedOne man listened for a few minutes a couple of kids staredand one woman recognized him
“Pearls before Breakfast”The Washington post, 2007
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Perception is culturally constructed
Perception
Language helps catagorise & communicate-Can we understand something without a word for it?e.g. cancer
Emotions help make value judgements- Emotions improve memory
Reason helps order & link relationships - Cause & effect
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Perception is culturally constructed
So if meaning is culturally constructed, where does that leave us?
Science
Art HistoryMaths
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