CS228 HumanComputer Interaction

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CS228 Human-Computer Interaction
The mid-term Monday, March 2nd, in class 50
minutes Closed book Material tested Lectures 1
Jan 12 to 16 Feb 27, inclusive. Material
from guest lecturers will not be
included (although some of their examples might
be helpful) Mixture of short-answer and
design/analysis questions
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CS228 Human-Computer Interaction
The mid-term Mixture of short-answer and
design/analysis questions Short answer What
does PACT stand for? Give some examples of
technologies, and the P, A and Cs related to
them.
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CS228 Human-Computer Interaction
The mid-term Mixture of short-answer and
design/analysis questions Design
question Describe a new interactive technology
that allows users with little fine motor control
(such as a cerebral palsy sufferer) to
create smooth curves in a drawing program.
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CS228 Human-Computer Interaction
The mid-term Mixture of short-answer and
design/analysis questions Analysis
question Imagine you receive financial backing
from the National Institutes of Health (NIH) to
carry out a large-scale evaluation of your new
technology on 500 users, with varying degrees of
motor impediment. How would you organize the
testing, such that an automated test provides
quantitative data about the quality of
interaction and the results are fed back into
the technology to automatically improve it. What
will you measure? How will you measure it? How
will the data be combined to provide an overall
reflection of quality? How will the technology
adapt itself based on the test results?
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CS228 Human-Computer Interaction
The mid-term Mixture of short-answer and
design/analysis questions Study strategy, Part
I All material on the lecture slides is fair
game. You dont need to memorize the details
about how all the technologies introduced
work (You dont need to understanding the
internal workings of the damaged robot) but
you should understood why they were introduced,
and what concept they help illustrate. (People
build mental models of themselves, and so does
the robot. People also build mental models of
other people and technologies)
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CS228 Human-Computer Interaction
The mid-term Mixture of short-answer and
design/analysis questions Study strategy, Part
II Start by studying the slides, and using
the textbook to deepen your knowledge about
the concepts introduced. If something is in the
textbook, but is unrelated to anything on the
slides, it will not be on the exam. Lateral
thinking (finding new ways to create or analyze
hypothetical technologies) and using
examples to demonstrate your understanding of
concepts will be of great use on this test.
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CS228 Human-Computer Interaction
Displaying Visual Information Interactive
technologies are often windows onto vast
quantities of data many different classes of
data data stored at different time resolutions
(real-time, by minute, by year) and spatial
resolutions (by inch, by square mile, by
parsec) subjective data (I felt pretty bad
when John said what he said) objective
data (numbers, dates, (facts?), statistics) data
of doubtful quality (conflicting instances, noisy
data, human accounts) conceptual data (Income
per capita) data with physical counterparts
(number of items in the inventory) data-about-dat
a, or metadata (numbers of entries, time stamps,
etc.) How to present this information? What are
the main strategies?
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CS228 Human-Computer Interaction
Displaying Visual Information How to present
this information? What are the main
strategies? Simplification is not
sufficient, because details important to a given
user may be lost. Systematization (put all data
in the same format, to ease searching) is not
sufficient for the same reason (somethings lost
in translation). Providing all the data as
is is not sufficient, because the new user may
not have a global picture. Providing
metaphors is useful users transfer their
intuitions about the physical world to the
conceptual world Ex How would you visualize the
spread of AIDS around the world? Ex How would
you visualize the spread of an idea around the
world? (What is the metaphor here?) but is
not sufficient, because not everyone may get
the metaphor.
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CS228 Human-Computer Interaction
Displaying Visual Information
Hans Rosling, creator of GapMinder, lectures at
TED (Technology, Entertainment, Design)
conference What conceptual objects are
introduced? (GNP, AIDS, education issues) What
aspects of GapMinder bring them to life? (Graphs,
animations, ) What visual constructs are used to
represent the data? (Circles, areas, heights,
etc.) What visual metaphors does he draw on? (eg.
China is closing in on the U.S) Note the
players here Rosling, the crowd, the data, the
visualizations, the way he interacts with his
computer