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1 | |
The ability to derive impressions of the 3-D shape of an object from that object's motion is called |
| | A) | motion parallax. |
| | B) | movement stereopsis. |
| | C) | structure from motion. |
| | D) | optic flow. |
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2 | |
One of the most important features of biological motion is |
| | A) | it requires viewing the entire body. |
| | B) | that the parts of the body move relative to one another. |
| | C) | it is not sufficient to discriminate gender. |
| | D) | it requires sophisticated thought processes to analyze. |
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3 | |
Which of these statements is not true about optic flow? |
| | A) | The focus of radial expansion is where you are heading. |
| | B) | Features and objects aren't necessary to perceive optic flow. |
| | C) | Relatively little information is needed for a high degree of accuracy in determining direction. |
| | D) | It is one of the few aspects of vision that is unimpaired in older observers. |
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4 | |
The visual system is able to judge the time of arrival to an obstacle in part because it has a good estimate of the |
| | A) | distance to the obstacle. |
| | B) | individual's rate of travel. |
| | C) | obstacle's size. |
| | D) | change in the size of the obstacle's retinal image. |
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5 | |
Which of the following is a problem with using tau, the rate of change in the size of an objects retinal image, to predict the time to collision with an object? |
| | A) | It's only accurate if the approach rate is constant. |
| | B) | It's not accurate for vertical movements. |
| | C) | If the approach rate is too slow, the visual system can't detect the change in image size. |
| | D) | You can't estimate tau unless the object is consistently being watched. |
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6 | |
The dissociation between early, large movements of the hand and the later, finer movements is called |
| | A) | optic ataxia. |
| | B) | akinetopsia. |
| | C) | motion blindness. |
| | D) | proprioception. |
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7 | |
Which of these statements about saccadic eye movements is false? |
| | A) | They are extraordinarily fast. |
| | B) | They can be corrected once initiated. |
| | C) | They occur several times a second. |
| | D) | They result in a temporarily blurred image. |
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8 | |
Saccadic suppression may be partially due to |
| | A) | the image being blurred by high retinal velocities. |
| | B) | inhibitory surround mechanisms. |
| | C) | activity in the temporal pathway. |
| | D) | binocular rivalry. |
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9 | |
If a person wills their eyes to move to the left, but the eyes are unable to move (say, due to being paralyzed), the perceived environment will |
| | A) | appear to move left. |
| | B) | appear to move right. |
| | C) | appear to not move at all. |
| | D) | be suppressed entirely. |
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10 | |
The accuracy of smooth eye movements depends on the |
| | A) | direction of the moving target. |
| | B) | distance to the moving target. |
| | C) | size of the moving target. |
| | D) | speed of the moving target. |
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11 | |
The motion-selective neural network proposed by Reichardt |
| | A) | detects motion in a particular direction, regardless of velocity. |
| | B) | detects motion at a particular velocity, regardless of direction. |
| | C) | detects motion at a particular direction and velocity. |
| | D) | is only found in higher animals. |
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12 | |
When asked to match the speed of a large moving square to that of a smaller moving square, subjects |
| | A) | are quite accurate. |
| | B) | make the large square move too fast. |
| | C) | make the large square move too slow. |
| | D) | are quite random. |
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13 | |
Second order motion |
| | A) | is a measure of acceleration rather than velocity. |
| | B) | is defined by luminance variation over space and time. |
| | C) | can be detected by a simple Reichardt-style motion extracting circuit. |
| | D) | includes the motion of texture boundaries. |
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14 | |
Research on apparent motion has suggested that |
| | A) | it only occurs when the two static stimuli are delayed in presentation by over one tenth of a second. |
| | B) | subjects cannot determine the direction of the apparent motion unless they can discriminate the order in which the two static stimuli were presented. |
| | C) | subjects cannot determine the direction of the apparent motion unless they can discriminate the order in which the two stimuli were presented. |
| | D) | it can be explained by the responses of simple direction selective neurons. |
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15 | |
In solving the correspondence problem for apparent motion, when multiple potential correspondences exist, the visual system tends to |
| | A) | assume that all possible stimuli moved. |
| | B) | assume that as few stimuli moved as possible. |
| | C) | base its interpretation on the length of the delay between presentations. |
| | D) | ignore physical constraints on motion, such as inertia. |
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16 | |
Research on the aperture problem suggests that |
| | A) | a single neuron can uniquely specify the direction of a stimulus that is larger than the receptive field |
| | B) | there is only one unique set of stimulus conditions that will result in a given pattern of movement. |
| | C) | the visual systems interpretation of a stimulus is usually the simplest global motion. |
| | D) | the visual system will not alter its interpretation of the perceived direction of the stimulus behind an aperture. |
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17 | |
Neurons in MSTd differ from MT neurons in that |
| | A) | their receptive fields are much smaller. |
| | B) | many respond quite strongly to stimulus rotation |
| | C) | they are located in the "dorsal" stream. |
| | D) | all of them respond quite poorly to "looming" stimuli. |
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18 | |
Motion aftereffects, such as the waterfall illusion are most likely caused by |
| | A) | the autokinetic effect. |
| | B) | akinetopsia. |
| | C) | strabismus. |
| | D) | motion adaptation. |
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2002 McGraw-Hill Higher Education