Table 1 One sentence definition for each of the graph properties.

From: Visibility graph analysis for educational data: potentials and a case study of predicting at-risk online students

Measure

Easy-to-understand description

Degree Distribution

(Pk)

Refers to the probability distribution of the degrees (number of connections) of nodes in a graph

Degree Centrality

(DC)

Quantifies the number of direct connections a node has within a graph

Closeness Centrality (CC)

Quantifies how close a node is to all other nodes in the graph in terms of the shortest paths

Eigenvector Centrality (EC)

Assigns importance to a node based on both its direct connections and the importance of those nodes it is connected to

Betweenness Centrality (BC)

Quantifies the extent to which a node lies on the shortest paths between other pairs of nodes, highlighting its potential influence in controlling information flow

Gravity Index Centrality (GIC)

Is based on the universal gravity concept, which considers both neighbors’ node’ influences and path information in the graph

Clustering Coefficient

Quantifies the degree to which nodes in a graph tend to form clusters or tightly interconnected groups

Jaccard Similarity Coefficient

Quantify the similarity between two sets of nodes by dividing the size of their intersection by the size of their union

Shannon Entropy

Quantifies the uncertainty or information content of node attributes, providing insights into the diversity or heterogeneity within the graph

Diameter

is the maximum shortest path length between any pair of nodes in a graph, indicating the longest distance or number of steps required to travel between nodes

Transitivity

Quantifies the likelihood that if node A is connected to node B and node B is connected to node C, then there is also a connection between node A and node C

Scale-Free

A property of complex graphs where the distribution of node degrees follows a power-law distribution, with a few nodes having a significantly higher number of connections compared to the majority of nodes

Small-World

A property of a graph characterized by a high level of local clustering, where nodes tend to be connected to their immediate neighbors, along with short average path lengths between any two nodes in the graph