PSYC 100 Lecture Notes - Lecture 9: Lateral Inhibition, Parietal Lobe, Receptive Field
3 Jul 2018
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Lessons Nine & Ten:
1. Which of the following is true about colour receptors?
1.a)Any wavelength will stimulate all four types of colour receptors, but will
do so unequally
1.b)Any wavelength will stimulate only one or two of the four types of colour
receptors
1.c) Any wavelength will stimulate all three types of colour receptors, but
will do so unequally
1.d)Any wavelength will stimulate only one or two of the three types of colour
receptors
2. Phenomena such as blind sight and visual agnosia demonstrate that:
2.a)conscious perception is always necessary for behaviour to occur
2.b)consciousness and perception are unrelated
2.c) perceptions can cause behaviour even when we are not aware of them
2.d)brain damage does not always cause deficits in perception
3. Visual acuity is sharpest when images cast by environmental stimuli fall directly
on the fovea because:
3.a)there are fewer bipolar and ganglion cells in the area surrounding the
fovea than there are in the area surrounding the retina's periphery
3.b)each cone synapses directly onto a single ganglion cell and there is a
concentration of cones in the fovea
3.c) the distance between the retina and the optic nerve is minimized at the
fovea
3.d)the fovea has no blind spot
4. Suppose you stared at a blue balloon, then sifted your eyes to a white surface and
saw a yellow afterimage of the balloon. This afterimage would be explained by
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the fact that retinal neurons that respond most to blue-appearing light
____________, while those that respond to yellow-appearing light ___________.
4.a)became fatigued; still responded strongly
4.b)respond subtractively; respond additively
4.c) continue to respond strongly; respond equally strongly
4.d)continue to respond strongly; add their excitation to that of the "blue"
neurons
5. Which of the following does not contribute to our depth perception?
5.a)occlusion (objects blocking on another)
5.b)the size of objects
5.c) retinal disparity (differences between the left and right retinal image)
5.d)the density of cones at the fovea
6. Which of the following is TRUE about vision?
6.a)Colour vision is the result of the relative firing of the cone receptors.
6.b)The layer of the retina where the photoreceptors are found is closest to the
lens of the eye, and photoreceptors send their information to deeper layers,
closer to the back of the retina, where the bipolar and ganglion cells are
found.
6.c) When people see green, it is because there is activity in the 'green'
photoreceptors uniquely; other photoreceptor types are not active.
6.d)Most people have three types of photoreceptors.
7. Which of the following is TRUE about the visual system?
7.a)Lateral inhibition in cortex is an important determiner of perceptual
constancy.
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PSYC 100 Full Course Notes
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Document Summary
1. a) any wavelength will stimulate all four types of colour receptors, but will do so unequally. 1. b)any wavelength will stimulate only one or two of the four types of colour receptors. 1. c) any wavelength will stimulate all three types of colour receptors, but will do so unequally. 1. d)any wavelength will stimulate only one or two of the three types of colour receptors: phenomena such as blind sight and visual agnosia demonstrate that: 2. a) conscious perception is always necessary for behaviour to occur. 2. c) perceptions can cause behaviour even when we are not aware of them. 2. d)brain damage does not always cause deficits in perception: visual acuity is sharpest when images cast by environmental stimuli fall directly on the fovea because: 3. a) there are fewer bipolar and ganglion cells in the area surrounding the fovea than there are in the area surrounding the retina"s periphery.
