Usability tests
Measuring whether real people can use the application: the protocol of a user test, thinking aloud, the number of participants, measures of success, time and errors, and the SUS questionnaire.
- 24 cards
- 6 topics
- Free
The outline, topic by topic
Each topic is weighted the way the exam weighs it.
- Concepts
- Questions
- Sort and link
- The numbers
- The curves
- Scenarios
A few cards from the deck
Usability: what is it?
Show the answer
The extent to which specific users achieve a specific goal with effectiveness, efficiency and satisfaction.
Three measures: succeeding (effectiveness), without too much time or effort (efficiency), and being pleased (satisfaction). It is measured on real people, not on the team's opinion.
Eight participants attempt a task and six complete it. What is the success rate?
- 75 %
- 86 %
- 62,5 %
- 25 %
Show the answer
75 %
The rate is the number of successes divided by the number of participants: 6 ÷ 8 = 75%. 86% divides by 7, 62.5% matches 5 successes out of 8, 25% is the share of failures.
The SUS questionnaire has … statements rated from 1 to 5 and gives a score out of ….
Show the answer
The SUS questionnaire has ten statements rated from 1 to 5 and gives a score out of 100.
The points of each answer (0 to 4) are added, then multiplied by 2.5: 40 × 2.5 = 100.