6.

Skin conductance is a physiological metric that could be included in a usability test as a measure of:

Group of answer choices

eye fixations

heart rate variance

stress

levels of success

7

The basic goal of developing a single usability score for a product is to:

Group of answer choices

detect outliers in the results

compare performance to an expert level

combine different metrics into a single score for a product

allow use of radar graphs

8

Before a usability study started that involved ten different tasks, the following threshold for success for the product was set at: all participants need to have > 80% task success and take < 5 minutes to complete each task.

You receive a report that a usability test was conducted with 8 participants and that the mean task success across participants was 82% and the mean time-on-task across participants was 4.6 minutes.

What would you conclude based on this information?

Group of answer choices

The threshold for success was clearly met.

Task success and time-on-task were positively correlated in this test.

You need to know the standard deviations of the means to determine whether or not the threshold for success was met.

You need to see separate data for each participant to know whether or not the threshold for success was met.

9

According to "Measuring the User Experience", the term "usability scorecard" is often used to refer to:

Group of answer choices

a chart that presents the results for more than one metric

a table that is used to show calculations for a single usability metric

a chart that shows only one metric

the moderator's notes on the performance of participants on each task in a usability test

10

When converting the results for task success, time on task, and a subjective rating for a task into a combined % metric of performance for that task, which of the following steps is needed?

Group of answer choices

The time on task values need to be converted so that better performance (i.e., shorter times) results in a higher %.

The subjective ratings need to be converted to a scale with 0%=very easy and 100%=very difficult.

The task success values need to be converted so that higher % indicates more failures.