INFO3315 – Exam Revision
The School of Computer Science
The University of Sydney
How to Write a Good
Answer
Anusha Withana
1
What is Expected in
an Answer
INFO3315
CSCW
Users need to coordinate the tasks, therefore,
system should support coordination
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shifts one after the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social activity.
1. Which category of the Time/Space Groupware Matrix (Johansen - 1988) your application will fit in?
2. Explain why?
Communication & coordination
CSCW
Users have to work in the same space
(surgical theatre) at different times (one
after the other)
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shiNs one aNer the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social acOvity.
1. Which category of the Time/Space Groupware Matrix (Johansen - 1988) your applicaOon will fit in?
2. Explain why?
Continuous task / Continuous interaction
CSCW
Users have to work in the same space at
different times
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shifts one after the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social activity.
1. Which category of the Time/Space Groupware Matrix (Johansen - 1988) your application will fit in?
2. Explain why?
Continuous task / Continuous interaction
CSCW
Researchers can immerse in the activity and
understand the requirements
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shiNs one aNer the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social acOvity.
1. What is the best requirement gathering technique for this system
2. Explain why?
Ethnography
Ethnography
• Ethnography is a requirement gathering technique
which include participant observation and interviews
• Ethnographers immerse themselves in the culture that
they study
• A researcher’s degree of participation can vary
• Collections of comments, incidents, and artifacts are
made
www.id-book.com
CSCW
Researchers can observe, take notes in the
activity space, but limit the engagement not
to interrupt the activity
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shifts one after the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social activity.
1. What is the best requirement gathering technique for this system
2. Explain why?
Ethnography
CSCW
Surgery is a critical application, so silent
observation will best fit here.
In a surgical theater, two teams of surgeons, nurses and other medical professionals work in shifts one after the
other. They have to coordinate the equipment use and space that being used. You have been assigned to
develop a system to support this social activity.
1. What is the best requirement gathering technique for this system
2. Explain why?
Silent observation
If you miss the discussion
from last week?
A brief run through
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
If you have fat fingers, you find it diffic lt
to use touch screen devices.
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
Different people have different finger sizes.
Some people have fingers that are too big. It is
impossible to design an interface to fit all
finger sizes. If the designers designs icons
that are small, they are hard to select by
larger finger sizes.
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
Different people have different finger sizes.
Some people have fingers that are too big. It is
impossible to design a multi touch interface
to fit all finger sizes. If the designers
designs icons that are small, they are hard to
select by larger finger sizes.
This part is correct, but you have exhausted the length.
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
In a multi touch scree , If the icons are
designed small, they are hard to touch and
select by large fingers.
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
If t e icons are small compared to finger,
t ey are hard to select.
Fat finger problem
INFO3315 Human-Computer Interaction
Exercise sheet 3
Dr. Anusha Withana
Semester 2 - 2019
Exercise 1 - Fat finger problem (1 + 1 + 1 = 5 points)
1. Briefly explain what is the fat finger problem relative to a multi-touch screen. (3 sentences)
2. Explain a real scenario where you faced the fat finger problem in a multi-touch device. (3 sentences)
3. Watch the video “Precise Selection Techniques for Multi-Touch Screens” on YouTube (https://
youtu.be/EIPWkh0xaG8). Explain how you can adapt one of the solutions from the video to resolve
the above issue. (3 sentences)
Sample solution.
1. The fat finger problem occurs on touch devices and happens, if certain elements are to small to be
hit with the finger. Occlusion is another problem - you occlude elements with your own finger and
can’t see them properly. [1 P]
2. Subjective answer. [1 P]
3. Subjective answer. [1 P]
1
Small icons are hard to select by large
fingers
More Revisions to
Follow
Thank you!

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