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Exam 1 Grade Distribution

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.

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Exam 1 Grade Distribution

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  1. Exam 1 Grade Distribution Mean = ~77

  2. Exam 1 Grade Distribution Note the “ceiling effect”: these grades would have gone here if the max score was more than 100 Mean = ~77

  3. Upcoming: Read article by Gregory for Thursday Read chapter by Pinker for February 28th

  4. Seeing Depth • The world is 3D, the retina is 2D !

  5. Depth Cues • Four categories: • Pictorial • Physiological • Motion • Stereoscopic

  6. Pictorial Depth Cues • Shadows and Shading

  7. Pictorial Depth Cues • Retinal image size • far objects smaller than near objects

  8. Pictorial Depth Cues • 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

  9. Pictorial Depth Cues • Retinal image size

  10. Pictorial Depth Cues • Retinal image size

  11. Pictorial Depth Cues • Linear perspective

  12. Pictorial Depth Cues • Texture gradient

  13. Pictorial Depth Cues • Height in the plane

  14. More Depth Cues • Pictorial Depth Cues • Physiological Depth Cues • Motion Parallax • Stereoscopic Depth Cues

  15. Physiological Depth Cues • Two Physiological Depth Cues • accommodation • convergence

  16. Physiological Depth Cues • Accommodation

  17. Physiological Depth Cues • Convergence

  18. 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?

  19. Physiological Depth Cues • Convergence and accommodation are reflexively linked Under what circumstances might this be a problem?

  20. Motion Depth Cues • Motion • Parallax

  21. Motion Depth Cues • Parallax

  22. Motion Depth Cues • Parallax • points at different locations in the visual field move at different speeds depending on their distance from fixation

  23. Muller - Lyer Illusion

  24. Muller - Lyer Illusion

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