This paper compares two type of concept maps
- Hierarchical
- Network

 Hierarchical and Network

Amadieu, F., Van Gog, T., Paas, F., Tricot, A., & Mariné, C. (2009). Effects of prior knowledge and concept-map structure on disorientation, cognitive load, and learning. Learning and Instruction, 19(5), 376-386. https://doi.org/10.1016/j.learninstruc.2009.02.005

University of Michigan - Ann Arbor

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- In Hybrid map the most general notions are located on the left-middle corner. readers focus more on the left corner when beginning to read a concept map [nesbit2007students]
- Hierarchical left-to-right concept maps are superior to top-down network concept maps [amadieu2009effects].

Left-to-right orientation improves readability

Nesbit, J., Larios, H., & Adesope, O. (2007, June). How students read concept maps: A study of eye movements. In EdMedia+ Innovate Learning (pp. 3961-3970). Association for the Advancement of Computing in Education (AACE).

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