The Hotspots of Sports Science and the Effects of Knowledge Network on Scientific Performance Based on Bibliometrics and Social Network Analysis

Table 3

Independent variable correlation test and VIF.

		1	2	3	4	5	VIF
1	Degree centrality	—					39.75
2	Betweenness centrality	0.8139	—				8.41
3	Closeness centrality	0.6509	0.3321	—			3.86
4	PageRanks	0.9723	0.8996	0.5446	—		54.20
5	Clustering	−0.5139	−0.2454	−0.4942	−0.4341	—	2.01
6	Structural holes	0.4862	0.1788	0.7743	0.3840	−0.6369	3.32