[Bring a ruler to the test. Be prepared to draw diagrams.]

1. Be able to explain and diagram the difference between corresponding and noncorresponding retinal points.

2. What is the horopter? What is special about the retinal images of objects that are on the horopter? What is special about the horopter in terms of describing everyday depth perception?

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. Use this diagram to explain the concept of retinal disparity as a cue to depth.

4. Be able to explain how stereo photographs, anaglyphs, and single image stereograms produce depth effects.

5. What is a monocular depth cue? Name 3 types of monocular cues and provide examples.

6. What is an "Ames room"? Be able to explain how an Ames room is constructed to create its illusion. Is it a size illusion or a depth illusion?

7. Be able to explain how motion parallax contributes to the location of objects in space.

8. Be able to diagram and explain "corollary discharge theory."

9. Be able to explain how corollary discharge theory applies to concrete everyday situations in which you may be moving (or not) and an object may be moving (or not).

10. What is the autokinetic effect? What is "shimmer"? Explain how corollary discharge theory accounts for these effects. Should the effect increase or decrease if your body is swaying slightly?

11. What are the two types of stroboscopic motion illusions? What is seen in each case? Which one did Gestalt psychology consider more important? Why?

12. Explain "structure from motion" and why it occurs.