Classroom interaction analysis techniques for classroom teachers ...

Redesigning Pedagogy 2011 12the teacher, then the pedagogy is a teacher centred class; but if she is a student, the high degreeindicates that the class might not be dynamic enough, in another words, it is too centralized in termsof opportunity distribution.Betweenness Centrality. While Diane has many direct ties, Heather has few directconnections (3) – fewer than the average in the network. Yet, in many ways, she has one of the bestlocations in the network. She is between two important constituencies. She plays a 'broker' role inthe network, signifying that she plays a powerful role in the network (but she is a single point offailure). Without her, Ike and Jane would be cut off from information and knowledge in Diane'scluster. A node with high betweenness has great influence over what flows in the network. A nodelike Heather holds a lot power over the outcomes in a network. In language classroom, Heather’language habit should be encouraged, she is not very talkative with the same person, but tries to talkto different persons with the language patterns she has learned from each other, so she is the‘transmitter’ of the new language knowledge.Closeness Centrality. Fernando and Garth have fewer connections than Diane, yet the patternof their direct and indirect ties allow them to access all the nodes in the network more quickly thananyone else. They have the shortest paths to all others, in other words, they are close to everyoneelse. They are in an excellent position to monitor the information flow in the network, i.e., theyhave the best visibility into what is happening in the network. Therefore, Fernando and Garth’sbehaviours are also ideal in terms of language learning, they learn most from others, and vice versa.For instance, their vocabulary is rich and they intend to be exposed to wide variety of structuralpatterns of the target language.Network Centralization. Individual network centralities provide insight into the individual'slocation in the network. The relationship between the centralities of all nodes can reveal much aboutthe overall network structure. A very centralized network is dominated by one or a few very central