Lecture 2

Question 1

Usability

Answer 1

Determined by the purpose and individual acceptance of the user. It affects im indirectly.

Question 2

Attributes of Usability Nielsen

Answer 2

Learnability, Efficiency, Memeriablity, Erros, Satisfaction

Question 3

Usability ISO

Answer 3

Extent to which a product can be used by specified users to
achieve specified goals with effectiveness, efficiency, and satisfaction in a
specified context of use

Question 4

Effectiveness

Answer 4

Quality, accuracy, and completeness with which users achieve goals

Question 5

Efficiency

Answer 5

1998: Effort necessary to reach a certain level of quality, accuracy, and completeness
2018: Resources used in relation to the results achieved (typical resources include time, human effort, costs and materials)

Question 6

Context of use

Answer 6

1998: Users, tasks, equipment, physical and social environment, organizational
requirements
2018: Combination of users, goals and tasks, resources, and environment (includes
the technical, physical, social, cultural and organizational environments)

Question 6

Satisfaction

Answer 6

1998: Comfort and acceptability of the system to its users (enjoyable, motivating? or
limiting, irritating?)
2018: Extent to which the user’s physical, cognitive and emotional responses that
result from the use of a system, product or service meet the user’s needs and expectations

Question 7

Measures of Effectiveness

Answer 7

Binary Task Completion, Accuracy, Recall, Completeness, Quality of Outcome

Question 8

Measures of Efficiency

Answer 8

Time, Input rate, Mental Effort, Usage Patterns, Learnings

Question 9

Measures of Satisfaction

Answer 9

Standard questionairs, Preference, Satisfaction with the interface, Attitudes and perceptions

Question 10

SUS

Answer 10

Abwechselnd 1 gut, 5 schlecht , 5 gut, 1 schlecht. Frage mit ungrade position:
pos - 1, Frage mit gerade position 5 - pos. Am ende mit 2.5 multiplizieren.