Web usability is achieved by designing for the intended attention types

Only one type of attention can be given to one thing at one time, and this is a constraint that should be considered to make usable websites.

Users will usually come into a website looking for something. In this scenario, users will be using the playful attention type, therefore the web pages should be designed for scanning (Websites should be designed for scanning).

Once users have found what they are looking for, they will usually be required to spend an effort, like filling a form, for example. In this scenario, users will be using the analytical attention type, therefore the web pages should help the users focus (Websites should be designed to allow focus).

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• Usable websites require less psychic energy to be used
  • This is why Web usability is achieved by designing for the intended attention types. Adding long instructions, for example, will drain the users energy unnecessarily (Self-evident websites do not need instructions).