HCI 2020-21 End Sem

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HCI 2020-21 End Sem

Final Exam

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What is the purpose of alt text in html img tag

1 point

Describing the image for designers

Helping to debug

Describing the image content to blind users through screen reader

Helping motor impaired users to browse

Clear selection

Stereoscopic displays are different from non-stereoscopic ones in terms of

1 point

Resoluton

Refresh Rate

Motion Blur

Depth Perception

Clear selection

NASA TLX scale is used for

1 point

Cognitive Load estimation

EEG measurement

Estimating users' preference

User interface personalzation

Clear selection

Advantage of vibro-tactie haptic system over force feedback systems

1 point

Less bulky

Consumes less power

Portable

All of the above

Clear selection

GOMS model can be used to

1 point

Predict task completion time

model expert performance

divide goal of interaction into sub-goals

All of the above

Only options 1 and 2

Clear selection

What is a correct expression of Index of Difficulty in the context of Fitts' Law

1 point

Log (1 + 2 X Distance / Width)

Log (1 + 2 X Width / Distance)

Distance / Width

All of the above

Clear selection

Find Index of Performance for the following Fitts' Law study results in bits/sec. Link to data https://tinyurl.com/2p8ht4tf

5 points

0.02

0.87

0.44

0.50

Clear selection

Mark the correct expression of result for the following ANOVA table

2 points

F(2,175)=29.18,p<0.01

F(2,177)=29.18,p<0.01

F(175, 177)=29.18,p<0.01

F(175)=2839,p<0.05

Clear selection

With reference to the ANOVA table in previous question, how many independent conditions were there?

1 point

Clear selection

What is the range of pupil dilation when eyes are open?

1 point

2 to 8 mm

12 to 18 mm

1 to 5 cm

0.1 to 1.5 mm

Clear selection

If distance from eye to target is D and target size is S, which is the correct expression of visual angle

2 points

2 arctan(S/2D)

2 arctan(D/2s)

2 arcsin(S/2D)

2 arctan(SD)

Clear selection

What type of eye tracker will you prefer for accurately analyzing eye gaze in a smartphone.

1 point

Screen mounted infra red based eye tracker

Wearable eye tracking glasses

Webcam based eye tracker

All of the above

Clear selection

What is accommodation vergance problem in the context of AR

1 point

Less spatial resolution

Less temporal resolution

Motion blurr

Adjusting perceived depth of synthetic objects with real objects

Clear selection

What is p in the context of statistical hypothesis testing

1 point

probability of Type II error

probability of Type I error

probability of RMS error

Percent of variance explained

Clear selection

Augmentative and Alternative Communication Aid is commonly used for

1 point

Pilots

Drivers

Blind users

Users with speech and motor impairment

All of tthe above

Clear selection

Midas Touch problem in an eye gaze controlled interface is referred to

1 point

accuracy of eye tracking

selecting screen element

frequency of eye tracker

organization of screen elements

pointing to screen elements

Clear selection

Which of the following options best explains the term ‘Forward Kinematics’ with respect to Robotics?

1 point

Creating a record of robot poses for forward motion

Finding end effector position and orientation given the joint angles

Creating a map of the robot environment for motion planning

Finding the joint angles given the end effector position and orientation

Clear selection

Calculate upper outer fence for the following list of numbers 10, 34, 53, 556, 453, 232, 5, 66

2 points

550

231

1065

Clear selection

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