Fig. 5From: Concept networks of students’ knowledge of relationships between physics concepts: finding key concepts and their epistemic supportRadar maps of the key concepts in the collated network. The radar map representation of the 18 most important key concepts in the collated concept network. In the left column, the communicability (black polygon) is compared with the strength of nodes (red polygon) for the weighting β=10−2. In the middle, the communicability (black) and the strenght (red) are compered for β=100, and on the right for β=102. The out- and in-communicabilities are shown in the upper and lower rows, respectivelyBack to article page