Chapter 4
Summary
This chapter dealt much more in depth with the problem that machinery have when it comes to how the user perceives interacting with it. The author makes references to the fact that they make things to invisible to the user that they become confused about what is happening and what to do next. This meaning like after doing some action a feedback mechanism is needed to aid the user in what is happening.
Discussion
I think this is a very important chapter for any future designer of interfaces. Simple things such as grouping and hiding the controls that are very rarely used help in the day to day use of the invention.
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