Psyc2320 Midterm II Review
Psyc2320
Midterm II Review
Physiological Depth Cues
– Accommodation
Physiological Depth Cues
– Convergence
crossed convergence uncrossed convergence
Large angle of convergence Small angle of convergence
HOROPTER
FIXATION POINT
Anything closer than the fixation point is in a crossed disparity
Binocular disparity
HOROPTERFIXATION POINT
Anything farther away than the fixation point is in an uncrossed disparity
Binocular disparity
RIGHT EYE LEFT EYE
If you uncross convergence, your right eye gets these faces shifted slightly to left, left eye gets them shifted to right = CROSSED DISPARITY
AutostereogramsAny repeating objects that have a spacing different from the background will have either crossed or uncrossed disparity
RIGHT EYE LEFT EYE
If you uncross convergence, right eye gets these faces shifted slightly to right, left eye gets them shifted to left = UNCROSSED DISPARITY
AutostereogramsAny repeating objects that have a spacing difference from the background will have either crossed or uncrossed disparity
Question 1
What is the difference between a stereogram and an autostereogram?
In a stereogram there is a plate in-between the viewers eyes, forcing him into uncrossed convergence
In an autostereogram there is no external aid to help the viewer in to uncrossed convergence; the viewer has to disconnect the accommodation/convergence reflexes
Question 2
What is parallax?
Points at different locations in the visual field move at different speeds depending on their distance from fixation
Question 3
Fill in:Crossed convergence shifts right eye’s image
slightly to the _______ and the left eye’s image slightly to the _______
LEFTRIGHT
Autostereograms
Left Eye’s Image
Right Eye’s Image
Crossed convergence shifts right image to the right of the left image and vice versa:
Autostereograms
Left Eye’s Image
Right Eye’s Image
Crossed convergence shifts right image to the right of the left image and vice versa:
Autostereograms
Left Eye’s Image
Right Eye’s Image
Crossed convergence shifts right image to the right of the left image and vice versa:
Question 3
Fill in:Crossed convergence shifts right eye’s image
slightly to the _______ and the left eye’s image slightly to the _______
Uncrossed convergence shifts right eye’s image to the ______ of the _____ eye and vice versa
LEFTRIGHT
LEFT LEFT
Autostereograms
Left Eye
Right Eye
Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa:
Autostereograms
Left Eye
Right Eye
Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa:
Autostereograms
Left Eye
Right Eye
Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa:
Question 4 Which is correct?a) Head is accelerated in the direction of the blue arrowb) Head is accelerated in the direction of the red arrow
Cupula
Question 4 Which is correct?a) Head is accelerated in the direction of the blue arrowb) Head is accelerated in the direction of the red arrow
Cupula
Fluid goes this way
Head accelerates this way
Question 5
• Where on the tongue is the taste receptor for ‘bitter’ located?
Distributed evenly across the tongue surface with the exception of on the filiform region
Question 6
Which perception is associated with these physical properties of light?
IntensityFrequencyPolarization
BrightnessColorNot sensed by humans
Question 7What happens when we move the reference lap...
Question 7What happens when we move the reference lap...
....here???
Question 7
The viewer will perceive the light coming from the lamp as being moved further back in a 3D image
Question 8
What do you get if you use a prism to combine all wavelengths of light?
WHY?
What do you get if you mix a bunch of light?
WHY?
WHITEAll the wavelengths are added together. When they are all reflected at the same time, you see white
BLACK
The pigment in paint SUBTRACTS the different wavelengths – with enough pigments mixed, all the wavelengths are ‘absorbed’ and you see it as black
Question 9
How do we see color in a dim setting?
Question 9How do we see color in a dim setting?a) We perceive color not based on absolute wavelengths, but based on the wavelengths available to us
Question 9How do we see color under different illumination conditions?
b) COLOR CONSTANCY
The ‘color’ of objects is independent of the ambient light. The color of an object is perceived as the same under different lighting conditions to aid in object recognition and identification
Question 10
What is size constancy?
Perceived size of an object is adjusted according to perceived distance (based on other cues)