Analysis of information sources in references of the Wikipedia article "Concept map" in English language version.
Although Novak originally started with the idea of hierarchical tree-shaped concept maps. This idea is not continued by the followers of Novak's technique or has either been dropped altogether. ... The difference between concept maps and mind maps is that a mind map has only one main concept, while a concept map may have several. This means that a mind map can be represented in a hierarchical tree structure.
Shavelson et al. (1994) identified a number of variations of the general technique presented here for developing concept maps. These include whether (1) the map is hierarchical or free-form in nature, (2) the concepts are provided with or determined by the learner, (3) the students are provided with or develop their own structure for the map, (4) there is a limit on the number of lines connecting concepts, and (5) the connecting links must result in the formation of a complete sentence between two nodes.
Shavelson et al. (1994) identified a number of variations of the general technique presented here for developing concept maps. These include whether (1) the map is hierarchical or free-form in nature, (2) the concepts are provided with or determined by the learner, (3) the students are provided with or develop their own structure for the map, (4) there is a limit on the number of lines connecting concepts, and (5) the connecting links must result in the formation of a complete sentence between two nodes.