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Human-Computer Interaction 9
HCI University of Z├╝rich
12
Computer Science
Undergraduate 1
01/04/2017

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Cards

Term
Human time limits
Definition
0.1 s user feels that the system reacts instantaneously
1 s users flow of thought stays uninterrupted
10 s users attention still with the dialogue
Term
What does GOMS-KLM operations mean?
Definition
Goals, operators, methods, selection rules - keystroke-level model
Term
What are the different GOMS-KLM operations? How long do they take?
Definition
K = keying (0.35 s)
P = pointing (1.1 s)
P1 = clicking (0.2 s)
H = homing hand between keyboard and mouse (0.4 s)
M = mental operation (1.35 s)
R(t) = response time from computer on a task t
Term
What are the mental operator rules?
Definition
1. Add M in front of each K, except
- inside on e cognitive unit (e.g. characters in one word, digits and decimal point in on number)
- terminators that are always present
- consecutive terminators
2. Add M in front of each P or P1 except:
- anticipated clicking right after pointing
- selecting an argument of a command
3. Remove M that overlaps with R(t)
Term
Fitts law formula explained
Definition
[image]
Term
What is the Hick-Hyman law
Definition
Estimating reaction time when making choices
Term
Hick-Hyman law formula explained
Definition
[image]
Term
Fitts law definition
Definition
Estimating movement time in pointing devices
Term
Beating Fitts' law
Definition
- Mouse acceleration
- Expand the target when mouse in nearby
Term
What if theres a function in Screen edges?
Definition
width = infinity
Term
Beating Hick-Hyman Law
Definition
- Show recent items at the top
- Adapts visibility & ordering based on the context
Term
Information-theoretic efficiency
Definition
[image]
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