ssd4 所有quiz的答案（含讲解）
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2018-05-07
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SSD4
Quiz 1
1. How many chunks of information can working memory hold at one time?
(a) Nine
(b) One
(c) Five
(d) Three
Correct answer is (d)
See section 1.1.3 of the course notes.
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2. Which of the following is a description of Fitts's Law（费茨法则）?
(a) The time it takes to point to a target is a constant: it takes the same amount of time to point to
one target as it does to any other target.
(b) The time it takes to point to a target is directly related to the distance to that target.
(c) The action of clicking a button takes 200 msec.
(d) When calculating the time it takes to point to a target, the size of the target is not important.
Correct answer is (b)
See section 1.1.3 of the course notes.
Fitts 法则最基本的观点就是任何时候，当一个人用鼠标来移动鼠标指针时，
屏幕上的目标的某些特征会使得点击变得轻松或者困难。目标离的越远，到达
就越是费劲。目标越小，就越难点中。
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3. Which of the following is an implication that the characteristics of the human fovea have
for the design of visual interfaces?
(a) It is important to design around the eye's blind spot, which makes it difficult to see parts of the
screen.
(b) Be careful when using blinking text or animations because they naturally draw the user's
attention.
(c) Because the fovea encompasses only 2 degrees of visual angle, all text should be concentrated
in a small area of the screen.
(d) There are no design implications.
Correct answer is (b)
See section 1.1.3 of the course notes.
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4.According to the information processing model of human cognitive activity, which of the
following happens to information from the outside world immediately after it is perceived by the
perceptual processor?
(a) The cognitive processor determines that an action needs to be taken.
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