exam 1 grade distribution

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Exam 1 Grade Distribution Mean = ~77

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Exam 1 Grade Distribution. Mean = ~77. Exam 1 Grade Distribution. Note the “ceiling effect”: these grades would have gone here if the max score was more than 100. Mean = ~77. Upcoming:. Read article by Gregory for Thursday Read chapter by Pinker for February 28 th. Seeing Depth. - PowerPoint PPT Presentation

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Page 1: Exam 1 Grade Distribution

Exam 1 Grade Distribution

Mean = ~77

Page 2: Exam 1 Grade Distribution

Exam 1 Grade Distribution

Mean = ~77

Note the “ceiling effect”: these grades would have gone here if the max score was more than 100

Page 3: Exam 1 Grade Distribution

Upcoming:

Read article by Gregory for ThursdayRead chapter by Pinker for February 28th

Page 4: Exam 1 Grade Distribution

Seeing Depth

• The world is 3D, the retina is 2D !

Page 5: Exam 1 Grade Distribution

Depth Cues

• Four categories:1.Pictorial2.Physiological3.Motion4.Stereoscopic

Page 6: Exam 1 Grade Distribution

Pictorial Depth Cues

– Shadows and Shading

Page 7: Exam 1 Grade Distribution

Pictorial Depth Cues

– Retinal image size– far objects smaller than near objects

Page 8: Exam 1 Grade Distribution

• Retinal image size– problem: big far things same as close

small things– “solved” by size constancy: Perceived size

is adjusted according to perceived distance (based on other cues)

– forms the basis for several visual illusions

Pictorial Depth Cues

Page 9: Exam 1 Grade Distribution

• Retinal image size

Pictorial Depth Cues

Page 10: Exam 1 Grade Distribution

• Retinal image size

Pictorial Depth Cues

Page 11: Exam 1 Grade Distribution

• Linear perspective

Pictorial Depth Cues

Page 12: Exam 1 Grade Distribution

• Texture gradient

Pictorial Depth Cues

Page 13: Exam 1 Grade Distribution

• Height in the plane

Pictorial Depth Cues

Page 14: Exam 1 Grade Distribution

More Depth Cues

• Pictorial Depth Cues• Physiological Depth Cues• Motion Parallax• Stereoscopic Depth Cues

Page 15: Exam 1 Grade Distribution

Physiological Depth Cues

– Two Physiological Depth Cues1. accommodation2. convergence

Page 16: Exam 1 Grade Distribution

Physiological Depth Cues

– Accommodation

Page 17: Exam 1 Grade Distribution

Physiological Depth Cues

– Convergence

Page 18: Exam 1 Grade Distribution

Physiological Depth Cues

– Convergence– small angle of convergence = far away– large angle of convergence = near

– What two sensory systems is the brain integrating?

– What happens to images closer or farther away from fixation point?

Page 19: Exam 1 Grade Distribution

Physiological Depth Cues

– Convergence and accommodation are reflexively linked

Under what circumstances might this be a problem?

Page 20: Exam 1 Grade Distribution

Motion Depth Cues

– Motion1. Parallax

Page 21: Exam 1 Grade Distribution

Motion Depth Cues

– Parallax

Page 22: Exam 1 Grade Distribution

Motion Depth Cues

– Parallax– points at different locations in the visual

field move at different speeds depending on their distance from fixation

Page 23: Exam 1 Grade Distribution

Muller - Lyer Illusion

Page 24: Exam 1 Grade Distribution

Muller - Lyer Illusion