Image:Moon by Helmut Adler.jpg|thumb|This image map is an example of mystery meat navigation. For example, finding where to click on Mare Humorum is difficult without hovering over every place (which is not possible on devices that have no cursor, such as tablets). Also, it may not be readily apparent that the image is a clickable map instead of only a simple picture of Earth's Moon.
circle 215 280 75 Mare Imbrium
rect 440 165 530 282 Mare Tranquillitatis
circle 355 192 50 Mare Serenitatis
circle 536 120 25 Mare Crisium
rect 560 170 640 260Mare Fecunditatis
circle 592 313 25 Mare Nectaris
rect 217 131 260 172 Mare Frigoris
rect 185 160 217 170 Mare Frigoris
rect 125 210 150 245 Mare Frigoris
rect 90 400 190 570 Oceanus Procellarum
rect 190 515 280 600 Oceanus Procellarum
circle 350 615 35 Mare Humorum
rect 373 468 447 580 Mare Nubium
circle 339 510 25 Mare Cognitum
circle 354 293 25 Mare Vaporum
circle 304 348 25 Sinus Aestuum
circle 265 410 15 Copernicus
circle 205 485 5 Kepler
rect 507 570 534 593 Tycho
poly 298 224 291 160 271 176 298 224 Montes Caucasus
poly 296 233 314 238 300 326 283 347 296 233 Montes Apenninus
rect 224 180 269 201 Montes Alpes
circle 184 210 5 Plato
circle 405 400 345 Moon
Mystery meat navigation (also known as MMN) is a form of web navigation user interface whereby the target of each link is not visible until the user points their cursor at it. Such interfaces lack a user-centered design, emphasizing Aesthetics, white space, and the concealment of information over practicality and functionality.
Terminology
The epithet "
mystery meat" refers to the meat products often served in American public school cafeterias whose forms have been so thoroughly reprocessed that their exact types can no longer be identified by their appearances;
similarly, the destinations of links using mystery meat navigation are unknown by appearance alone. Using such a navigation has been likened to processed meat products as "you're not sure what meat you've got until you bite into it".
Flanders originally and temporarily described the phenomenon as
Saturnic navigation in reference to the Saturn Corporation, whose company website epitomized this phenomenon.
Practice
The practice of mystery meat navigation may be defined as "frivolously concealing navigation options through
Mouseover and other tricks." It is considered problematic on information-rich websites because it makes it difficult for users to recognise the destinations of navigational
hyperlinks, or to discern where they are, and this increases the time a user takes to
Learnability the site.
Iconographic navigation
Website interface designers often decide to use iconographic navigation schemes as a way of reducing visual clutter and avoiding the need for language localisation.
The exclusive use of icons without explicit labels in a website navigation may not be considered
intuitive because it relies on the designer's personal understanding of the meaning of each icon.
The provision of
or
which are revealed on mouseover are not considered a satisfactory solution, as these techniques only introduce an element of exploration that has been likened to
minesweeping ("let's roll over everything and see if any surprises pop up"). This practice has been identified as a common
anti-pattern in interactive design.
Technology writer
Shelley Powers also notes that MMN often relies on
JavaScript, and that this can be detrimental to usability if a browser's scripting is disabled, and to search engine optimization.
Flanders writes, "The typical form of MMN is represented by menus composed of unrevealing icons that are replaced with Alt attribute only when the mouse cursor hovers over them".
"Click here"
Some technology commentators consider that the use of the popular phrase "Click here" as
link text is a type of mystery meat navigation. It is thought to be problematic because the phrase does not indicate the content of the link target, which confuses the user.
The W3C's Web Content Accessibility Guidelines, as well as organisations such as WebAIM, recommend against the use of phrases such as "click here" as link text.
Furthermore, the phrase is inappropriate for users who are not using a computer mouse to navigate, e.g. using a keyboard or a touchscreen device. It also presents particular difficulties for blind and visually impaired users who make use of screen reader software that reviews a list of available links on a page. Pages would also suffer when printed. A further disadvantage given is that it hinders the search engine optimisation of a page.[
]
See also
