Exploring the relationships between interaction measures and learning outcomes through social network analysis: the mediating role of social presence

Table 4 Changes in outdegree and indegree centralization on weekly discussion boards

Class	Week 2 (Open-ended)	Week 3 (Case-based)	Week 5 (Case-based)	Week 6 (Pros/Cons)	Week 7 (Case-based)
Outdegree centralization
Class 1	0.316	0.369	0.187	0.289	0.289
Class 2	0.265	0.166	0.098	0.141	0.210
Class 3	0.119	0.189	0.138	0.162	0.152
Class 4	0.118	0.139	0.143	0.086	0.204
Indegree centralization
Class 1	0.102	0.227	0.258	0.147	0.218
Class 2	0.185	0.166	0.178	0.220	0.210
Class 3	0.119	0.115	0.138	0.125	0.189
Class 4	0.118	0.139	0.104	0.126	0.124