Norman-The Design of Everyday Things
Chapter 1: The Psychopathology of Everyday
In this chapter the author of the book mentions the weakness design part of everyday objects. Later he explains the reasons of poor design. Visibility is one of the key component of good design.
Visibility indicates the mapping between intended actions and actual operations and crucial distinction.
People learn how to use a tool from the appearance of the it so designers should make it clear enough. Visual structure: affordances, constraints and mappings.
Fundamental principle for designing people are provide a good conceptual model and make things visible.
The characteristic of good conceptual model:
- predicts the effect of outcome
- not to be complex for everyday objects
- immediate feedback
Principle of Visibility
- good mapping natural relationship
- single controls - single functions
- understandable system
- results are sensible, non arbitrary and meaningful
Principle of Mapping:
- mapping: the relationship between two things ( between the controls and their movements and the result in the world.)
- easy to learn and remember
- natural relationship between the control and its function.( natural mapping)
Principle of Feedback
- feedback: What result has been accomplished as a result of an action.
- problem more features and less feedback so give more frequent feedback
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