Download - The Science of Illusions May 7, 2013
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The Science of Illusions
May 7, 2013
Cedar RienerAssistant Professor of Psychology
Randolph-Macon CollegeTwitter: @criener
Science Pub RVA
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Illusions are Everywhere!
Perception
Attention
Memory
Happiness
Decision-Making
Language
Conscious Will
Illusion of Being There
Illusion of Being
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Illusions are Informative
How we see it wrong -> How vision works
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Visual Illusions Show Decisions
• We are interested in surface colors, object shapes
• But color and shape are not on the retina
• We guess at color and shape
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Brightness is an Illusion
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Which square is a lighter gray?
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Illusions and Science: Brusspuporiginal illusion: Adelson Checkerboard
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Brightness is a Decision
Luminance = illumination/reflectance
luminance
illumination
reflectance
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Shape is an Illusion
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Ames Window
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Belgian Rock Band: Goose
Music Video for “British Mode”
Directed by Keith Schofield
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Attention
We only see what we pay attention to
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Attention movies
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Memory is an Illusion
Listen to these words
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Your memories change every time you remember
Not “record, rewind and play”
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Which were on the previous list?
• Bed• Paper• Keyboard• Door• Drowsy• Awake• Doctor • Dream
• Sleep• Mouse• Camera• Box• Hospital• Rest• Skin• Nurse
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Illusions are Everywhere (Review)
• Vision – Color/Brightness and shape are guesses and decisions
• Attention – We ignore most of what is out there• Memory – We recreate our memories every
time we remember
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Illusions inform us of limits
Image on the eye
Attention
Memory} Constrained, short, sparse
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But we’re good enough, smart enough…
To solve the common problems of human life (among the hardest engineering problems ever):
• Understanding and producing human speech• Walking• Object Perception (recognizing words, faces)