Assessing Usability
Question 8.3
Remembering names and use of commands: difficult/easy
This question relates to how easy subjects found it to remember the names
of commands and how to use them. Both groups provide almost identical
ratings indicating that they both felt that they could
remember this infor-
mation with above average ease. However, it is clear from the Post-Test
Survey (PTS) scores for the two groups that this is most certainly not the
case. With an average PTS score of 9.3, the Control group
clearly found it
more difficult to remember commands than the Experimental group with a
PTS score of 4.5. To put this in context, Control subjects
remembered on
average just 5.7 commands whereas subjects in the Experimental group re-
membered on average 11.5 commands; the Experimental
group performed
roughly twice as well as the Control group.
In the other sections of the questionnaire, we can see quite striking dif-
ferences in the satisfaction levels of both groups with regard to the various
aspects
of the user guide, product and tasks. In the following paragraphs we
will examine these sections.
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