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RS: Usability & User experience Evaluation > 2. No theme? > Flashcards

2. No theme? Flashcards

1
Q

What are performance measures?

A
  • Task success
  • Time on task
  • Errors
  • Click path
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2
Q

What are advantages of performance measures?

A
  • Statistically valid
  • Clear to explain
  • Easy to compare
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3
Q

Of what should you be aware when using performance measures?

A
  • Number fetishism

- Cause & effect implications

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4
Q

What is task success?

A

Determines what is success and what is failure

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5
Q

What could failure be?

A
  • Person gives up
  • Time limit reached
  • Researcher intervenes
  • Incorrect answer

Think this through!

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6
Q

How can you define success criteria thoroughly?

A

Task with a clear end state

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7
Q

What are levels of success?

A
  • Requiring assistance (perceived struggle and needed assistance)
  • Difference in journeys (optimal vs. less optimal way)
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8
Q

What are levels of succes in the usability perspective?

A
  • Complete succes (with or without assistance)
  • Partial success (with or without assistance)
  • Failure (user thought was complete but wasn’t or gave up)
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9
Q

What are the 4 levels of succes from the user experience perspective?

A
  1. = No problem
  2. = minor problem
  3. = major problem
  4. failure/gave up
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10
Q

What does no problem means in the user experience perspective levels of success?

A

The user completed the task successfully without any difficulty or inefficiency.

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11
Q

What does minor problem means in the user experience perspective levels of success?

A

The user completed the task successfully but took a slight detour. He made one or two small mistakes but recovered quickly and was successful.

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12
Q

What does major problem means in the user experience perspective levels of success?

A

The user completed the task successfully but had major problems. She struggled and took a major detour in her eventual successful completion of the task

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13
Q

What does Failure/gave up means in the user experience perspective levels of success?

A

The user provided the wrong answer or gave up before completing the task or the moderator moved on to the next task before successful completion.

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14
Q

Wat is usage?

A

Tasks that are performed repeatedly

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15
Q

Why should you be aware of what you expect a good time on task is?

A

Short time on task can mean, not hindered by issues.

Long time on task could mean engagement OR issues

Therefore you should always do a mix of methods. E.g. ask how the user perceived the passage of time

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16
Q

What is usage in combination with errors?

A

Error could be the result of an underlying (usability) use

Or symptom of task failure, but NOT reason

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17
Q

What are errors?

A

The outcomes of usability issues

18
Q

What are slips?

A

Typo, accidental misclick

19
Q

What are mistakes?

A

Clicking on something that is not clickable, entering wrong data, performing the wrong action

20
Q

How do you improve slips?

A

Reduce number of actions required, work on error handling and prevention

21
Q

How do you improve mistakes?

A

Provide better supports, hints, fix UI problems, fix usability study scenario/tasks

22
Q

What is click path?

A

Number and sequence of clicks (actions) needed to complete a task

23
Q

For what are first click test useful?

A

For small tasks or UI considerations

24
Q

What is user testing?

A

Generally scripted product use (tasks, based on user research)

25
Q

What is the usability trap?

A

Only creating what a usability test can measure (avoiding complexity)

26
Q

What is the main idea of log data?

A

Essentially being able to reconstruct (parts of) the interaction of one particular user with a system while also being able to generalize and find patterns

27
Q

What is A + B testing?

A
  • The same as A/B testing, but sequential.
  • –> compare your measures before and after the change was made
  • Within subjects (also bit between)
28
Q

What are analytics compared to usability testing

A
  • Generally collected remotely and asynchronously
  • Larger sample size (but more anonymous)
  • Over time (returning users - learnability, active users, adoption)
  • Allows you to discover patterns in the data
  • Natural product use (no predefined tasks)
29
Q

What are analytics compared to logging?

A
  • Very similar, but then with standardized measures

- Logging can be part of a usability study and an analytics approach

30
Q

What are implicit measurements?

A
  • Psychophysiology
  • Eye tracking
  • Facial behavior analysis
  • Pose, motion tracking
31
Q

How does eye tracking work?

A

The light reflecting from the cornea and the center of the pupil are sued to inform the eye tracker about the movement and direction of the eye

32
Q

What are fixations in eye tracking?

A

100-300ms: visual information is gathered

33
Q

What are saccades in eye tracking?

A

20ms Vision is suppressed

34
Q

What are fixation sequences (scan path) in eye tracking?

A

When, where and for how long people looked at it

35
Q

Which questions can fixation sequences answer?

A
  • Where do people look first?
  • What did they look at before the usability issue occurred?
  • How do people learn from an interface?
36
Q

What is the area of interest (AOI)?

A

a pre-post-selected area on the interface you are interested in researchingg

37
Q

What is facial behavior analysis?

A
  • Focus on strong emotional reactions

- Primitive emotions or action units

38
Q

What is the Facial Action Coding System?

A
  • Systematic description of facial muscle movements and corresponding emotions
  • Basis for face reader software (e.g. lie to me)
39
Q

When do you use the face reader?

A
  • When strong emotional occur
  • When the temporal pattern of emotion is important
  • When strong emotional reactions matter in the usability of the product
40
Q

What are challenges of the face reader?

A
  • Limited to basic emotions and extreme cases

- Unclear what triggered a change in emotion

RS: Usability & User experience Evaluation (5 decks)

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