Psychology 3203

Questions to Ponder before Test 3

1. What is a binocular depth cue? What are examples of binocular depth cues?

2. Be able to identify the difference between corresponding and noncorresponding retinal points. What is the horopter? What is special about the retinal images of objects that are on the horopter?

3. Diagram two objects, one of which is in front of the horopter and another object that is beyond the horopter, and indicate where their retinal images will be located. Understand the difference between crossed and uncrossed disparity.

4. Imagine that you are sitting in class and you look at various people/objects. How does retinal disparity produce depth?

5. Understand how binocular stereograms, anaglyphs, and single image stereograms produce depth effects.

6. What is a monocular depth cue? What are examples of monocular depth cues? What is "linear perspective"?

7. How does the impossible trident produce its illusion?

8. What is an "Ames room"? Understand how an Ames room is constructed to create its illusion. Is it a size illusion or a depth illusion?

9. What is the "moon illusion" and why does it occur? Is it a size illusion or a depth illusion?

10. What is speed constancy and velocity transposition? Does speed of an image across the retina predict our experience of object speed? Why or why not?

11. What is "corollary discharge theory"? Understand how corollary discharge theory applies to concrete situations in which you may be moving (or not) and an object may be moving (or not).

12. Understand how corollary discharge theory accounts for the case examples we discussed in class.

13. What is the autokinetic effect? Explain how corollary discharge theory accounts for these effects.

14. What is motion parallax? How does motion parallax contribute to the location of objects in space.

15. What is the difference between beta and phi motion? What is seen in each case? Which one did Gestalt psychology consider more important? Why?

16. What is stroboscopic motion? Understand how the "wagon wheel" illusion works.

17. How does motion parallax help us to perceive the structure of an object?

18. What is the "aperture issue" in dealing with motion of an image on the retina? How does the visual system deal with the issue?

19. What is "change blindness"? What conditions may cause it? What does the occurence of change blindness tell us about how the visual system deals with object detection?