reading assignment n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Reading Assignment PowerPoint Presentation
Download Presentation
Reading Assignment

Loading in 2 Seconds...

play fullscreen
1 / 39

Reading Assignment - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

Reading Assignment. Read chapter by Pinker for Wed. of next week. Shape from Shading. Investigating Perception. Perception is mysterious So how do we go about understanding how it works?. Investigating Perception. What is Science?. Investigating Perception. What is Science?

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Reading Assignment' - teegan-tran


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
reading assignment
Reading Assignment
  • Read chapter by Pinker for Wed. of next week.
investigating perception
Investigating Perception
  • Perception is mysterious
  • So how do we go about understanding how it works?
investigating perception1
Investigating Perception
  • What is Science?
investigating perception2
Investigating Perception
  • What is Science?
  • Science is a method for understanding how nature works
science
Science
  • What isn’t Science?
  • Headlines on www.reuters.com Science Page:
    • Juan Strengthens Into Hurricane, Misses Bermuda
science1
Science
  • What isn’t Science?
  • Headlines on www.reuters.com Science Page:
    • Juan Strengthens Into Hurricane, Misses Bermuda
    • Japan's Mt Fuji Shows Subsidence, No Eruption Danger
science2
Science
  • What isn’t Science?
  • Headlines on www.reuters.com Science Page:
    • Juan Strengthens Into Hurricane, Misses Bermuda
    • Japan's Mt Fuji Shows Subsidence, No Eruption Danger
    • Official Report: French Heat-Wave Death Toll 15,000
science3
Science
  • What isn’t Science?
  • Headlines on www.reuters.com Science Page:
    • Juan Strengthens Into Hurricane, Misses Bermuda
    • Japan's Mt Fuji Shows Subsidence, No Eruption Danger
    • Official Report: French Heat-Wave Death Toll 15,000
    • Man Questioned in Australia Over Mutilated Whale Carcass
science4
Science
  • Science is like a set of procedures:

Identify a question

science5
Science
  • Science is like a set of procedures:

Make a Hypothesis

Identify a question

science6
Science
  • Science is like a set of procedures:

Make a Hypothesis

Identify a question

Make a Prediction

science7
Science
  • Science is like a set of procedures:

Make a Hypothesis

Identify a question

Make a Prediction

Test It

science8
Science
  • Science is like a set of procedures:

Make a Hypothesis

Identify a question

Make a Prediction

Prediction Fails

Prediction

holds

Test It

example the horizontal vertical illusion1
Example: The horizontal-vertical illusion
  • Question:
  • Hypothesis:
  • Prediction:
  • Test:
example the horizontal vertical illusion2
Example: The horizontal-vertical illusion
  • Question: Why does the vertical line seem longer?
  • Hypothesis:
  • Prediction:
  • Test:
example the horizontal vertical illusion3
Example: The horizontal-vertical illusion
  • Question: Why does the vertical line seem longer?
  • Hypothesis: Wundt -> vertical and horizontal eye movements scan the image differently
  • Prediction:
  • Test:
example the horizontal vertical illusion4
Example: The horizontal-vertical illusion
  • Question: Why does the vertical line seem longer?
  • Hypothesis: Wundt -> vertical and horizontal eye movements scan the image differently
  • Prediction: Stabilized image should eliminate the illusion
  • Test:
example the horizontal vertical illusion5
Example: The horizontal-vertical illusion
  • Question: Why does the vertical line seem longer?
  • Hypothesis: Wundt -> vertical and horizontal eye movements scan the image differently
  • Prediction: Stabilized image should eliminate the illusion
  • Test: Illusion is still present in afterimage!
muller lyer illusion
Muller-Lyer Illusion

What theory does Gregory take up?

muller lyer illusion1
Muller-Lyer Illusion

What theory does Gregory take up?

Thiery / Woodworth : Muller-Lyer figure “suggests perspective”

implicit is that the brain shrinks things that are perceived as near and expands things that are perceived as far away

size constancy
Size Constancy

Brain shrinks things that are near and expands things that are far

The Ponzo Illusion:

size constancy1
Size Constancy

The lines of perspective in the Ponzo Illusion make the top line appear farther away

Why isn’t it this simple for the Muller-Lyer Illusion ?

size constancy2
Size Constancy

The lines of perspective in the Ponzo Illusion make the top line appear farther away

Why isn’t it this simple for the Muller-Lyer Illusion ?

Because the Muller-Lyer figure looks flat !

paradox of pictures
Paradox of Pictures

What does Gregory find so paradoxical about pictures?

paradox of pictures1
Paradox of Pictures

What does Gregory find so paradoxical about pictures?

What does he do to remove the paradox so that the Muller-Lyer figure no longer looks flat?

removing the background
Removing the Background

With background removed, Muller-Lyer figure actually looks 3D

What prediction can you make about how the perceived size and the perceived distance of the center line are related?

How did Gregory test that?

removing the background1
Removing the Background

Perceived size and perceived distance are tightly related

size constancy in motion
Size Constancy in Motion

What does Gregory wonder about size constancy and motion?

How does he test that?

size constancy in motion1
Size Constancy in Motion

Gregory finds that motion does invoke size constancy in certain cases:

size constancy in motion2
Size Constancy in Motion

Gregory finds that motion does invoke size constancy in certain cases:

only when observer is accelerating

science works at different scales
Science Works at Different Scales
  • What’s the “Big Picture” theory, amid the more specific hypothesis? (hint: look in the first paragraph)
science works at different scales1
Science Works at Different Scales
  • What’s the “Big Picture” theory, amid the more specific hypothesis? (hint: look in the first paragraph)
  • That illusions occur because of perceptual mechanisms evolved to handle vision under normal circumstances
science works at different scales2
Science Works at Different Scales
  • What is Gregory’s theory about how the brain accomplishes this?
science works at different scales3
Science Works at Different Scales
  • What is Gregory’s theory about how the brain accomplishes this?

“it is as though the brain entertains alternative hypotheses of what object the eye’s image may be representing”

next time
Next Time
  • More on seeing in 3D
  • Read chapter by Pinker for Wed. next week