30 basic concepts that can not be ignored in website usability design

you don’t have to get anybody’s approval on everything. As a professional Web developer, you are advocates of your visitors’ interests and needs; you must stick to your understanding of good user experience, to ensure that the complex at the site under the framework of your visitors may still find their way. This means that you must be able to hold your ground and communicate your ideas effectively when discussing with users and colleagues. In fact, your job is to compromise and deal with wrong ideas and misleading concepts, rather than follow them blindly.

in this situation, there is nothing that can help you, except for the profound knowledge related to the fundamental problems in your work. But even if you know the knowledge, it’s important that you know how to call them and how to use them in the discussion. In addition, preparing the exact terminology you may need as an argument at hand is helpful to your discussion.

in this article, we present 30 important usability issues, terminology, rules and principles that are often forgotten, ignored, and misunderstood. Readability and legibility (readability) (legibility) what is the difference? What 80/20 and Pareto principle is what mean? What is the meaning of mine and satisfaction? Gradually strengthen and graceful degradation is what you can find the answer?.

I, availability: rules and principles,

7± 2 principles

because of the limited ability of the human brain to process information, it divides complex information into blocks and small units. According to George A Miller (George A. Miller) research, human short-term memory generally can only remember 5-9 things at a time. This fact is often used as an argument to limit the navigation menu option to the 7; however, the magic of "7, plus 2, or minus 2" has been a heated discussion. Therefore, it is not clear whether 7± 2 principles can and may or should be applied to web. The study of Miller.

2 second principle

a loose principle that users do not have to wait for more than 2 seconds for some system response, such as application conversion and the beginning of response time. Choosing 2 seconds is a bit arbitrary, but it’s a reasonable order of magnitude. The reliable principle is that the less the user waits, the better the user experience. Availability first.

3 Click principle

according to this principle, if the user cannot find the information and complete the website function in the 3 hits, the user will stop using this website. In other words, this principle emphasizes explicit navigation, logical architecture, and hierarchical structure of subsequent sites. In most cases, the number of clicks is irrelevant; what really matters is that visitors always know where they are now, where they have been, and where they will go. If users feel how full they are about how the system works

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