User Testing Exam Usability Metrics and Analysis

Question 1

What are the three core usability metrics defined by ISO 9241-11?

Accepted Answer

Effectiveness, efficiency, and satisfaction

Answer

Speed, accuracy, and learnability

Answer

Errors, completion rate, and engagement

Answer

Discoverability, memorability, and utility

Question 2

What is the System Usability Scale (SUS)?

Accepted Answer

A 10-item Likert-scale questionnaire that produces a 0–100 score measuring perceived usability

Answer

A 5-point rating scale for single-task satisfaction

Answer

A benchmark tool comparing products against ISO usability standards

Answer

An automated tool that scores interface accessibility

Question 3

What SUS score is generally considered to indicate 'good' usability?

Accepted Answer

70 or above

Answer

50 or above

Answer

90 or above

Answer

Any score above 60

Question 4

What does 'error rate' measure in a usability test?

Accepted Answer

The frequency of mistakes participants make while attempting to complete tasks

Answer

The number of system crashes during testing

Answer

The percentage of tasks that end in failure

Answer

How often participants deviate from the happy path

Question 5

What is a 'lostness metric' in usability research?

Accepted Answer

A measure of how much a participant's navigation deviates from the optimal path through a website

Answer

A self-reported rating of how confused a participant felt

Answer

The number of help requests a participant makes during a task

Answer

A measure of how often participants get distracted by off-task content

Question 6

What is the Single Ease Question (SEQ)?

Accepted Answer

A single 7-point rating scale asking participants how difficult a task was, administered immediately after each task

Answer

A yes/no question asking if the participant completed the task

Answer

A verbal prompt asking participants to describe their overall experience

Answer

A post-session questionnaire covering all tasks at once