In their work, designers often become expert with the device they are designing. Users are often expert at the task they are trying to perform with the device. [...] Professional designers are usually aware of the pitfalls. But most design is not done by professional designers, it is done by engineers, programmers, and managers.
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About Donald Norman
Donald Norman was a contemporary American researcher, professor, and writer. Donald Arthur Norman is an American researcher, professor, and author. Norman is the director of The Design Lab at University of California, San Diego. Read more on Wikipedia →