Concept maps are visual diagrams that show concepts and the relationships among them. Research suggests that they can meaningfully improve comprehension and may improve retention, particularly when learners actively create the maps rather than simply read maps made by someone else.
Effect on comprehension
Concept maps are generally effective for comprehension because they require learners to identify main ideas, organize information hierarchically, and state how ideas connect. This is especially useful for complex material—such as science, history, medicine, or theory-heavy nonfiction—where understanding depends on seeing relationships rather than memorizing isolated facts.
Meta-analytic research suggests that concept mapping can improve academic achievement relative to conventional instructional approaches, such as lectures, discussion, and text summaries. One recent meta-analysis reported a large average effect (d = 1.08), though this estimate should be interpreted cautiously because the included studies showed substantial variation in their results. The meta-analysis found that effects differed significantly by educational level, while other differences among studies may also have contributed to the variation (Source: The impact of concept maps on academic achievement: A meta-analysis).
In practical terms, concept maps are most likely to improve comprehension when the learner must add linking phrases—such as “causes,” “depends on,” “is an example of,” or “differs from.” Those links force the learner to explain the structure of the material, revealing both genuine understanding and gaps in understanding.
Effect on retention
Some evidence suggests that concept mapping can improve recall and retention, but this conclusion is somewhat less certain than the conclusion about immediate learning. Creating a map from memory requires active retrieval and elaboration: the learner recalls ideas, decides which are central, and connects them into a meaningful structure. Those are processes associated with stronger memory than passive rereading.
For example, a study of concept-mapping activities in political-science courses found that students using the activity showed improved mastery and recollection of course material compared with a control condition. Other educational research likewise reports better retention than traditional instruction, particularly when mapping follows instruction and helps learners reorganize what they have just learned (source: The Retention and Usefulness of Concept Maps as Advance Organizers).
Still, concept mapping should not be described as a guaranteed defense against forgetting. The amount of retention benefit depends on the quality of the map, the learner’s prior knowledge, the complexity of the material, and whether the learner returns to the material later. Long-term retention is most likely when concept mapping is combined with spaced retrieval practice.
Best way to use them
Concept maps work best as an active learning exercise. After reading a section or completing a lesson, close the source material and create a map from memory. Then check it against the material, correct missing links, and explain the map aloud or in writing.
Creating a map from memory may produce stronger learning benefits than simply reviewing a completed concept map because it requires the learner to actively reconstruct the knowledge structure. This process encourages retrieval, organization, and explanation rather than passive exposure.
For example, rather than listing “classical conditioning,” “reinforcement,” and “punishment” as disconnected terms, a learner could map how each process changes behavior, what triggers it, and how the concepts differ. That process improves comprehension because it makes the conceptual relationships explicit—and aids later recall because the material has been organized into a meaningful structure.
Bottom line
Concept maps are a worthwhile tool for comprehension and probably for retention. Their strongest benefit is not the visual format by itself; it is the mental work involved in selecting ideas, retrieving them, and explaining their relationships. For durable learning, use self-created concept maps alongside spaced retrieval practice and practice recalling the material without looking at notes.
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