Core Methods inEducationalData Mining
HUDK4050Fall 2014
AssignmentB5
Connections
I got a lot of questions on the homework, when 12345 posts 12 times in response to 24601Is this 12 connections?
Connections
I got a lot of questions on the homework, when 12345 posts 12 times in response to 24601Is this 12 connections?In Social Network Theory, it isn’tIt’s a connection with a strength of 12
What are other ways connection strength could be conceptualized,in an online course?
In the text, I described several types of nodes
In a graph of classroom interactions, there could be several different types of nodesTeacherTAStudentProject LeaderProject Scribe
What could the node types be,in an online course?
In the text, I described several types oflinks
In a graph of classroom interactions, there could be several types of linksLeadership role (X leads Y)Working on same learning resourceHelping actCriticism actInsultNote that links can be directed or undirected
What could the link types be,in an online course?
Four types of centrality
DegreecentralityCloseness centralityBetweenesscentralityEigenvector centrality
What does each one mean mathematically?
DegreecentralityCloseness centralityBetweenesscentralityEigenvector centrality
What does each one mean conceptually?
DegreecentralityCloseness centralityBetweenesscentralityEigenvector centrality
Questions or comments?
Network Analysis
The most common use of network analysis is for social networksWhen else might it apply?
Network Analysis
Let’s make a list of networks we could model, beyond online course forums
Let’s break into groups
Each group takes a type of networkOne group per network typeDefine what the meaning in this network would be (or could be) forNode types, links, link types, link strengthDensityReachability, Geodesic Distance, FlowCentrality (in its four forms)Other measures that might be particularly relevant for your type of network
Now reconvene
Who wants to shareWhat their network type isNode types, links, link types, link strengthAnything else that’s interesting
Other questions or comments?
An Example ofDiscovery with Models with Social Networks
Let’s watch togetherhttps://www.youtube.com/watch?v=F2y-GFzhEqc
Questions? Comments?
AssignmentB6
Correlation Mining
Next Class
No class Monday
Next Class
Wednesday, November 12Baker, R.S. (2014) Big Data and Education. Ch. 5, V1, V2.Arroyo, I., Woolf, B. (2005) Inferring learning and attitudes from a Bayesian Network of log file data. Proceedings of the 12th International Conference on Artificial Intelligence in Education, 33-40.Rai, D., Beck, J.E. (2011) Exploring user data from a game-like math tutor: a case study in causal modeling. Proceedings of the 4th International Conference on Educational Data Mining, 307-313.Rau, M. A., &Scheines, R. (2012) Searching for Variables and Models to Investigate Mediators of Learning from Multiple Representations. Proceedings of the 5th International Conference on Educational Data Mining, 110-117.
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