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Usability

Wednesday, January 18, 12
Usability (n): The
          effectiveness, efficiency,
          and satisfaction with
          which users can achieve
          tasks in a particular
          environment of a product.



Wednesday, January 18, 12
High usability
                        means a system is:



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easy to learn and remember



Wednesday, January 18, 12
efficient, visually pleasing,
          and fun to use



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quick to recover from errors



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Wednesday, January 18, 12
If your audience finds your
      document difficult to use, it
           doesn’t mean that
            they’ve failed.


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It means that you failed them.



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Things should be obvious.




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• Where to click
              • How to search
              • How to navigate individual pages

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Bad design is one thing, but ...



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context is another part of
        the problem.


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We’d like to think of our
                  readers as...



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Wednesday, January 18, 12
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This almost never happens.



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Wednesday, January 18, 12
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Users look feverishly for
                anything that is:



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interesting



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vaguely resembles what
                they’re looking for



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is clickable.



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Usability is mostly common sense.




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We don’t read screens.




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We don’t read screens.
                We scan screens.



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We don’t make
                            optimal choices.



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We satisfice.



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satisfying + sufficing = satisfice



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Why not look for the
                    best choice?



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4
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1. We’re usually in a hurry.



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2. There’s not much of a
  penalty for guessing wrong.



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3. Weighing options may
     not improve our chances.



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4. Guessing is more fun.



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Your job is to take all
                    this into account.



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Designing and writing
                       with end-users in mind




Wednesday, January 18, 12
Designing and writing
                      with end-users in mind




Wednesday, January 18, 12
Revising
                      with end-users in mind




Wednesday, January 18, 12
Revision


Wednesday, January 18, 12
We’re not fixing
                  websites in this class.



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We’re making
                        recommendations



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about effective revision.



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but in the process,



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you’ll write.
                               a lot.



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Professional Writing



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Status Reports
                     Heuristic Evals
                    Testing Materials
                  Executive Summaries
                    Testing Reports
                   Performance Evals
Wednesday, January 18, 12
This is also a class about



Wednesday, January 18, 12
work.



Wednesday, January 18, 12
Working ...
                            professionally.

                             in distributed
                            environments.


Wednesday, January 18, 12

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Usability intro 419