Direct manipulation provides
- Good idea of how each object works and how to control it
- Interface itself discloses how it is used
- The art in design is ti translate users cognitive capabilities and existing mental models into interfaces that work.
Computers bring flexibility and if we concentrate only on making interfaces more like real world then we cant have that kind of flexibility .
"If technology is to provide an advantage, the correspondence to the real world must break down at some point."- Jonathan Crudin
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