Question: In 1991, long before the current ISO standard, four classes of usability measures were identified from previously published usability studies: Goal achievement Work rate Knowledge
- In 1991, long before the current ISO standard, four classes of usability measures were identified from previously published usability studies:
- Goal achievement
- Work rate
- Knowledge acquisition
- Operability
Consider all the individual metrics that are covered in Chapters 4 7 in Tullis and Albert (2013). Reproduce the table below, and for each row, in Column B, enter a single metric that would fit the class in Column A.
| Column A Classes | Column B Metrics |
| Goal achievement |
|
| Work rate |
|
| Knowledge acquisition |
|
| Operability |
|
- marks
What other classes of metrics (presented in Tullis and Albert (2013) as chapters), are absent from this early list of usability measurements?
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