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Web usability of a website [1] consists of broad goals of usability, presentation of information, choices made in a clear and concise way, a lack of ambiguity and the placement of important items in appropriate areas as well as ensuring that the content works on various devices and browsers.
Web accessibility, or eAccessibility, [1] is the inclusive practice of ensuring there are no barriers that prevent interaction with, or access to, websites on the World Wide Web by people with physical disabilities, situational disabilities, and socio-economic restrictions on bandwidth and speed.
Usability includes methods of measuring usability, such as needs analysis [3] and the study of the principles behind an object's perceived efficiency or elegance. In human-computer interaction and computer science, usability studies the elegance and clarity with which the interaction with a computer program or a web site (web usability) is
The first web accessibility guideline was compiled by Gregg Vanderheiden and released in January 1995, just after the 1994 Second International Conference on the World-Wide Web (WWW II) in Chicago (where Tim Berners-Lee first mentioned disability access in a keynote speech after seeing a pre-conference workshop on accessibility led by Mike Paciello).
Computer accessibility refers to the accessibility of a computer system to all people, regardless of disability type or severity of impairment. The term accessibility is most often used in reference to specialized hardware or software, or a combination of both, designed to enable the use of a computer by a person with a disability or impairment.
Universal usability; Usability engineering; Usability lab; Usability of web authentication systems; Usability goals; Usability testing; Usable security; Usage-centered design; Use error; Use-centered design; Useable; User analysis; User interface design; User journey; User persona; User-centered design
8.1 Web Usability definition and components. ... This is an average article on the English Wikipedia. It has some useful information, but there is/are:
Small text affects readability a lot and has been thoroughly studied by usability experts: Small text is much harder to read for everyone. Usability guidelines recommend a default font size of at least 12 points (about 16 pixels, but pixels are evil). Reducing text size causes usability issues: The first usability issue to consider is ...