A mind map is a diagram used to visually organize information. A mind map is hierarchical and shows relationships among pieces of the whole.  It is often created around a single concept, drawn as an image in the center of a blank page, to which it is associated with images, words and parts of words are added. Major ideas are connected directly to the central concept, and other ideas branch out from those.
Mind maps can be drawn by hand, or as “rough notes” during a lecture, meeting or planning session, for example, or as higher quality pictures when more time is available. Mind maps are considered to be a type of spider diagram .  A similar concept in the 1970s was “idea sun bursting “. 
ALTHOUGH the term “mind map” was first popularized by British popular psychology author and television personality Tony Buzan , the use of diagrams visually That “map” information and branching using radial maps traces back centuries. These pictorial methods record knowledge and model systems, and have a long history in learning, brainstorming , memory , visual thinking , and problem solving by educators, engineers, psychologists, and others. Some of the earliest examples of such graphical records were developed by Porphyry of Tyros, a noted thinker of the 3rd century, as he graphically visualized the conceptcategories of Aristotle . Philosopher Ramon Llull (1235-1315) also used such techniques.
The semantic network was developed in the late 1950s by Allan M. Collins and M. Ross Quillian during the early 1960s. Mind maps are similar in radial structure to concept maps , developed by learning experts in the 1970s, but differ in that the training is simplified by a single central key concept.
Popularization of the term “mind map”
Buzan’s specific approach, and the introduction of the “mind map” arose during a 1974 BBC TV series hosted, called Use Your Head .   In this show, and companion book series, Buzan promoted his design of radial tree, diagramming key words in a colorful, radiant, tree-like structure. 
Buzan says the idea was inspired by Alfred Korzybski ‘s general semantics as popularized in science fiction novels, such as those of Robert A. Heinlein and AE van Vogt . He argues that while “traditional” outlines, readers actually tend to scan the entire page in a non-linear fashion. Buzan’s treatment also uses the functions of the brain of hemispheres in order to explain the claim.
Mind map guidelines
Buzan suggests the following guidelines for creating mind maps:
- Start in the center with an image of the topic, using at least 3 colors.
- Use images, symbols, codes, and dimensions throughout your mind map.
- Select keywords and print using upper or lower case letters.
- Each word / image is best alone and sits on its own line.
- The lines should be connected, starting from the central image. The lines become thinner as they radiate out of the center.
- Make the lines the same length as the word / image they support.
- Use multiple colors throughout the mind map, for visual stimulation and also for encoding or grouping.
- Develop your own personal style of mind mapping.
- Use emphasis and show associations in your mind map.
- Keep the mind map clear by using radial radiance or outlines to embrace your branches.
As with other diagramming tools, mind maps can be used to generate , visualize , structure , and classify ideas, and as an aid to studying  and organizing information, solving problems , making decisions , and writing.
Examples of personal, family, educational , and business situations, including notetaking , brainstorming organizing is reserved for later stages), summarizing, as a technical mnemonic , or to get out of a complicated idea. Mind maps are also promoted to collaborate in color pen creativity sessions.
In addition to these direct use cases, data retrieved from mind maps can be used to enhance many other applications; for instance expert search systems , search engines and search and tag query  To do so, maps can be analyzed with other methods of information . 
Differences from other visualizations
- Concept maps : Mind maps Differ from concept maps fait que mind maps focus is only one word or idea, whereas concept maps connect multiple words or ideas. Also, concept maps with their labels. Mind maps are based on radial hierarchies and tree structures denoting relationships with a central governing concept, while concept maps are based on connections between concepts in more diverse patterns. However, it can be part of a larger personal knowledge base system.
- Modeling graphs : There is no rigorous right or wrong with mind maps, relying on the arbitrariness of mnemonic systems. A UML diagram or a semantic network with structured elements. This is done in black and white with a clear and agreed iconography. Mind maps serve a different purpose: they help with memory and organization. Mind maps are collections of words structured by the mental context of the author with visual mnemonics, and, through the use of color, icons and visual links, are informal and necessary to the proper functioning of the mind map.
Cunningham (2005) “Mindfulness of concepts and ideas in science”.  Other studies also report some subjective positive effects on the use of mind maps.   Positive opinions on their effectiveness, however, were much more prominent among students of art and design than in those of computer and information technology, with 62.5% vs. 34% (respectively) agreeing that they were able to understand concepts. better with mind mapping software  . Farrand, Hussain, and Hennessy (2002) found that spider diagrams(similar to concept maps) had limited, but significant, impact on memory recall in undergraduate students (a 10% increase over baseline for a 600-word text only).  This improvement was only robust after a week for those in the graph and there was a significant decrease in motivation compared to the preferred methods of note taking. A meta study about concept mapping that is more effective than “reading text passages, attending readings, and participating in class discussions”. The same study also concludes that concept mapping is more effective than other constructive activities such as writing summaries and outlines. However, results were inconsistent, with the authors noting “significant heterogeneity was found in most subsets”. In addition, they concluded that low-ability students can benefit from higher-ability students.
Features of mind maps
Beel & Langer (2011) conducted a comprehensive analysis of the content of mind maps.  They analyzed 19,379 mind maps from 11,179 users of mind mapping SciPlore MindMapping (now Docear) and MindMeister . Results include that average users create a few mind maps (mean = 2.7), average mind maps are rather small (31 nodes) with each node containing about 3 words (median). However, there were exceptions. One user created more than 200 mind maps, the largest mind map of 50,000 nodes and the largest node contained ~ 7500 words. The study also shows the difference in mind mapping (Docear vs. MindMeister ).
Automatic creation of mind maps
There have been some attempts to create mind maps automatically. Brucks & Schommer created mind maps from full-text streams.  Rothenberger et al. Extracted the main story of a text.  And there is a question about the creation of sub-topics in mind maps. 
Mind-mapping software can be used to organize large amounts of information, combining spatial organization, dynamic hierarchical structuring and node folding. Software packages can extend the concept of mind-mapping to the Internet, like spreadsheets, documents, Internet sites and images.  It has been suggested that mind-mapping can improve learning / study efficiency up to 15% over conventional note-taking . 
- Graph (discrete mathematics)
- Mental literacy
- Nodal organizational structure
- Personal wiki
- Rhizome (philosophy)
- Social map
- Spider mapping
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