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Make things visible: bridge the gulfs of execution and evaluation. Use technology to make visible what would otherwise be invisible, thus improving feedback and the ability to keep control. –Donald A. Norman, The Design of Everyday Things Norman states: Mapping is a technical term meaning the relationship between two things, in this case between the […]

In the first of this series, I tried to persuade you that your computer was human-illiterate, and we defined and discussed usability, memorability, and learnability. In the second, we discussed Tognazzini’s Paradox: how the hardest part of designing an effective program is often what seems the most trivial – sometimes simply a matter of changing […]