6. If I was looking at two objects 1 metre away, what is the minimum distance I can tell which is closer to me?
1mm
30mm
5mm
10mm
7. What is crossed disparity?
Objects positioned closer than the fixation point on the horopter have crossed disparity
Objects positioned further from the fixation point on the horopter have crossed disparity
8. How do random dot stereograms show how stereopsis works re; binocular disparity?
Disparity and depth precede edge extraction in RDS. Because some dots are shifted laterally with respect to others, these dots in the displaced square do not fall on corresponding points on both eyes --> they have disparity
Edge extraction precedes disparity and depth in RDS. Because some dots are shifted laterally with respect to others, these dots in the displaced square do not fall on corresponding points on both eyes --> they have disparity
The edges are found, the disparity is calculated and the depth is determined
9. If I closed my left eye, and the target was closer than my fixation point, which diplopic image would disappear?
Right image
Left image
Neither image
Both images
10. What is motion parallax?
A MONOCULAR depth cue in which we view objects that are closer to us as moving faster than objects that are further away from us
A BINOCULAR depth cue in which we view objects that are closer to us as moving faster than objects that are further away from us
A MONOCULAR depth cue in which we view objects that are closer to us as moving slower than objects that are further away from us
A BINOCULAR depth cue in which we view objects that are closer to us as moving slower than objects that are further away from us
11. How do disparity-selective cells operate?
The seperation between the receptive field centers (relative to the fovea of each eye) of binocular cells in each eye defines the V1 cells preferred disparity
The disparity between the receptive field centers (relative to the fovea of each eye) of binocular cells in each eye defines the V5 cells preferred disparity
12. What is panums fusion area?
A narrow region on the horopter where targets falling on corresponding points are fused into a SINGLE image at a depth other than the horoper
A narrow region on the horopter where targets falling on corresponding points are fused into TWO IMAGES at a depth other than the horoper
A narrow region on the horopter where targets falling on NON-corresponding points are fused into a SINGLE image at a depth other than the horoper
A narrow region on the horopter where targets falling on NON-corresponding points are fused into TWO images at a depth other than the horoper
13. In stereopsis, what happens when objects are too close?
Double vision (diplopia)
Disparity becomes too small, depth cannot be inferred
14. What is uncrossed disparity?
Objects positioned further from the fixation point on the horopter have uncrossed disparity
Objects positioned closer than the fixation point on the horopter have uncrossed disparity
15. How do autostereograms demonstrate disparity-selectivity?
The picture appears superimposed with itself with an offset, the cells find matches in nearby repeated patterns. To view the image as 3D, eyes must converge at a diff plane of depth to the picture.
The two images are adjacent, the cells find matches in nearby repeated patterns. To view the image as 3D, eyes must converge at a diff plane of depth to the picture.
16. What is interposition?
When items further away from the individual are larger than those closer
When items further away from the individual are smaller than those closer
When items closer to the viewer occlude those further behind
When the texture of the item indicates depth
17. What happens to depth as disparity increases?
None of the above
Perceived depth decreases
Perceived depth increases
Perceived depth stays the same
18. Why are pictoral cues useful for depth perception?
They allow us to see depth without binocular disparity i.e with one eye
They allow us to see depth with binocular disparity i.e with one eye
19. What is accomodation?
The ability to stretch and relax the lens, the degree of strain is translated into the distance of the object
The ability to relax the lens, the degree of strain is translated into the distance of the object
The ability to stretch and relax the lens, the distance of the object is translated into degree of strain
The ability to stretch the lens, the degree of strain is translated into the distance of the object
20. What do targets falling on non-corresponding points produce? (Excluding panums)
