Chapter 3 Questions Flashcards
Patient L.M. was diagnosed with akinetopsia. This means that she is unable to perceive:
motion
The photoreceptors that allow you to perceive colors are called __________, and the receptors that can detect low levels of light are called __________.
cones; rods
Madison has difficulty perceiving fine details. This means she has trouble with __________, which is a function of the __________.
acuity; cones
The photoreceptors called rods are good for navigating in what kind of environment?
One that is dimly lit.
What is the process that leads to a stronger response from cells that detect the edge of a surface than from cells that detect the middle of a surface?
lateral inhibition
The response of a center-surround cell…
tends to be in one direction (e.g., increased firing) if the stimulation is in the center of the cell’s receptive field and in the opposite direction (e.g., decreased firing) if the stimulation is in the periphery of the receptive field.
In an experiment designed to test the receptive field of a center-surround cell, a stimulus was placed in several locations. In one instance the firing rate of the cell decreased below its normal (base-rate) rate. This most likely occurred because the
stimulus was in the part of the cell’s receptive field that causes inhibition of firing rather than excitation.
Which of the following regions in visual cortex is most likely to show abnormalities in a patient with akinetopsia?
MT
The pathway leading from occipital cortex to parietal cortex is called the
“where” system
Which of the following is NOT part of the way in which the binding problem is solved?
a. Systems have their own spatial maps, which they can align together.
b. Much of the information is combined in a separate area of the brain.
c. Cells from the different systems oscillate together in the same rhythm (i.e., fire synchronously).
d. Attention directed toward the item being perceived aids binding.
Much of the information is combined in a separate area of the brain.
Research about the what and where pathways suggests that the __________ lobe is important for determining the __________ of an object, whereas the __________ lobe is important for determining the __________ of the object.
parietal, location; temporal, identity
The primary visual cortex is located in the __________ lobe.
occipital
Which of the following is NOT supportive of the claim that perception is in the “eye of the beholder” and not in the stimulus itself?
a.
When presented with ambiguous letters, the visual system uses context to determine their identity.
b.
Some cells are specialized to detect only horizontal bars in the environment.
c.
A traffic light can be identified even if partially occluded by a tree branch.
d.
Whether someone remembers having seen an ambiguous figure (e.g., face-vase) before depends on whether the interpretation of the figure is the same.
b.
Some cells are specialized to detect only horizontal bars in the environment.
Suppose you are viewing a car that is moving progressively closer toward you. The image of the car that is cast on your retina will
become progressively larger.
Suppose you are walking progressively closer to a tree. The image the tree casts on your retina will __________, while your perception of the size of the tree will __________.
become larger; remain unchanged
