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RS: Usability & User experience Evaluation > 1. Introduction > Flashcards

1. Introduction Flashcards

1
Q

What is usability?

A
  • The user can do what he or she wants to do the way he or she expects to be able to do it, without hindrance, hesitation or questions.
  • “Absence of frustration”
  • “usability is only an issue when it’s absent”
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2
Q

Of what does usability exist?

A
  • Effectiveness (task completion)
  • Efficiency (time spend)
  • Satisfaction (no discomfort, positive attitude)
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3
Q

Of what does Bailey’s human performance model exist?

A
  • Somebody (Human)
  • Something (activity)
  • Some Place (context)
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4
Q

What are the phases of user experience?

A
  • System reliability phase (before 1950s)
  • System performance phase (1950’s-1960s)
  • User performance phase (1960s-1970s)
  • Usability phase (1980s-2000s)
  • User experience phase (2000s-)
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5
Q

What is user experience?

A

“ A person’s perceptions and responses resulting from the use and/or anticipated use of a product, system or service”

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6
Q

What are two ways to look at usability & UX?

A
  • Usability is a part of UX

- UX Is an extension of the ‘satisfaction’ part of usability

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7
Q

What are the stages in the UX in time model?

A
  1. Anticipated UX
  2. Momentary UX
  3. Episodic UX
  4. Cumulative UX
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8
Q

What is the when and how of anticipated UX?

A
  • When: before usage

- How: Imagining experience

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9
Q

What is the when and how of momentary UX?

A
  • When: During usage

- How: experiencing

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10
Q

What is the when and how of Episodic UX?

A
  • When: after usage

- How: reflecting on an experience

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11
Q

What is the when and how of Cumulative UX?

A
  • When: over time

- How: Recollecting multiple periods of use

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12
Q

What is usefulness?

A

“..The degree to which a product enables a user to achieve his or her goals, and is an assessment of the user’s willingness to use the product at all”

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13
Q

What is the danger of early usability testing?

A
  • Fixing problems instead of expanding solution space
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14
Q

Why would you evaluate?

A
  • Inform design decisions (= answer questions)
  • Identify and fix design problems
  • Money (cost reduction, profit gains)
  • Create a sense of involvement
  • Generation of scientific / intermediate level knowledge –> generalize
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15
Q

On what should you focus your investigation?

A
  • Behavior “the what”

- Attitude “the why”

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16
Q

What are advantages of informal evaluations?

A
  • Fast & cheap
  • Less planning
  • Loose recruitment (e.g., even colleagues)
  • Less structured (e.g., talk about existing usability issues)
  • Less formal output (report)
17
Q

What should you consider when evaluating?

A
  • Planning (approach, methods, time)
  • Sample (Sampling technique, kind of users, size)
  • Ethics (Consent, data transparency, privacy)
18
Q

What is purposive sampling?

A

recruiting people with one or more special characteristics

19
Q

What are the three different studies for sample size on evaluation?

A

Sample size depends on the evaluation.

  • Summative/assessment study, emphasis quantitative: 5-7
  • Formative/exploratory study, emphasis qualitative: 10-20
  • Comparison study: ~30 per group/product
20
Q

What are different parts of ethics you should keep in mind?

A
  • Informed consent
  • Right to withdraw
  • Permission to record
  • Privacy & confidentiality
  • Valid & reliable data
21
Q

What is intermediate level knowledge?

A

Research Design

Knowledge Artifacts

22
Q

What are four potential research directions?

A
  1. A more holistic vision for UX Evaluation
    - Pragmatic and hedonic
  2. Inspection methods for hedonic attributes
    - Psychophysiology
  3. Core skills needed fore evaluation
    - What do we all need as an interdisciplinary field?
  4. Learn from evaluation in practice
23
Q

What is triangulation?

A

an approach to data collection and analysis
That uses multiple methods, measures, or
Approaches to look for convergence on
Product requirements or problem areas.

24
Q

What are benefits of triangulation?

A
  • More in depth understanding (how + Why)
  • More richness, varied set of data
  • More convincing, persuasive recommendations
  • Reduce “inappropriate certainty” that not much is wrong with a design
  • Prioritizing requirements
25
Q

What is between methods triangulation?

A
  • Research methods (implicit & explicit)

- Qualitative & quantitative

26
Q

What is within methods triangulation?

A
  • Observers

- User groups

27
Q

What is sequential triangulation?

A

That is between studies

  • E.g. diary study followed up by an interview
  • User research followed up by evaluation of a prototype
28
Q

What is concurrent triangulation?

A

Within one study

- e.g. eye tracking and study

29
Q

Of what should you be aware with concurrent triangulation?

A

Order effects

RS: Usability & User experience Evaluation (5 decks)

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