psychology 2320 cognitionand perception: thinking and seeing dr.matthew tata department of...
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Psychology 2320Cognition and Perception:Thinking and Seeing
Dr. Matthew TataDepartment of Psychology and NeuroscienceUniversity of Lethbridge
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1. Gain insight and knowledge into the functioning of the mind.
2. Learn to think critically and creatively about perplexing questions.
3. Discover weird and interesting things about perception and cognition.
Objective
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- Sensory Physiology- Hearing- Vision
- Attention- Memory
Perception
Cognition
The Plan
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- Selected readings available at the bookstore
- Sensation and Perception, Coran, Porac & Ward on reserve in library
- Cognitive Psychology, Robinson-Riegler on reserve
Text
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Evaluation• Mid-Term 1 15% Feb 7,8,9• Mid-Term 2 30% March 7,8,9• Final 45% April 19, 20, 21• Ideas Journal 10%• Extra credit available through Psych Subject Pool• Midterms and final are WebCT taken in
the WebCT Test Centre• Dates TBA pending confirmation from the testing
centre
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Ideas Journal• Record your thoughts and questions about
perception and cognition• Keep track of your ideas - you never know
when you’re going to have a good one!
• You will be graded on how good your ideas are!
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A Good Idea:
• “the size of your eye has to be just right to match the focusing power of the cornea. How does the eye know when to stop growing? Is it because the brain tells it to stop when images are clearly focused? We could test this by looking at the size of the eyeballs in children who are born with cataracts since their brains don’t get accurate visual information from their eyes”
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A Bad Idea:
• “Matt was wearing a blue sweater today. I like blue. Blue is my favorite color. I wish I had a blue sweater.”
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Put Ideas in a Book
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Grades
Rounding will be down except when I decide otherwise!
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Interaction• My Office hours: immediately after class• Your TAs are Karla Ponjavic and Matthew Bednarczyk
• Emails: [email protected] and [email protected]
• Karla will hold review sessions before and after exams
• Karla will also run “virtual”review sessions:– Email well-thought out, specific questions to her during the week.
On Fridays, she will go through the questions, compile answers and send them out to the entire class (anonymously of course).
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Interaction
• Try to understand on your own FIRST!
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Rules
• If your cell phone rings, I get to answer it.
• If you need to take a nap, take it.
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If You Were in my Psych 1000 Lecture…
• There will be no Gorillas in this course…if you know what I mean.
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Perception: It’s not as Easy as it Looks
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Purpose of this Lecture:
•See cool illusions
•Notice (and begin thinking about) the mysteries of
perception and cognition
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What is an Illusion?
•When what you perceive is not what is really out there
•Visual Illusions happen in your visual system
•Optical illusions occur when the physical stimulus itself is
distorted
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What is an Illusion?
Optical Illusion Visual Illusion
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Size Constancy•Big and small = near and
far !?
•System adjusts size based on perceived distance
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Ponzo Illusion:
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Muller - Lyer Illusion
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Kaniza Triangle
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Illusory Contours
•Kaniza Triangle
•Neurons in higher levels of visual pathways “build”
contours from information in lower levels
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Apparent Motion
•Object disappears and reappears somewhere else
•Visual system “interpolates” motion in between
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Frazer Spiral:
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Frazer Spiral:
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Who did you see?
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The Necker Cube
Reversible Figure
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Impossible Staircase
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Shepard Tone
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Attention and Perception
•Your perception of a rich visual environment is an illusion!
•You actually are only aware of the small part of the scene that you are
attending to
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Attention and Perception
•Change Blindness: you can’t notice changes in a scene unless you
attend to the location of the change
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Attention and Perception
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Illusions
• Are cool.
• Highlight questions about how perception happens.
• Make you think.
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Next Time:
• A bit of philosophy and a bit of biology