CUMULATE user and domain adaptive user modeling

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This stream of work is aimed at improving CUMULATE's legacy one-fits-all algorithm for modeling user's problem-solving activity and creating a context-sensitive user modeling algorithm adaptable/adaptive to individual users' cognitive abilities as well as to individual problem complexities.

A new parametrized user modeling algorithm has been devised. A set of studies is set up to evaluate the new algorithm as well as its adaptability/adaptivity.

Study 1

This study involves retrospective comparative evaluation of the CUMULATE's legacy and parametrized user modeling algorithms. The evaluation is done using usage logs collected from 6 Database Management courses offered during Fall 2007 and Spring 2008 semesters at the University of Pittsburgh, National College of Ireland, and Dublin City University. Each course had roughly the same structure and an identical set of problems served by SQLKnoT system.

Scenario

Legacy CUMULATE algorithm and 3 versions of parametrized CUMULATE algorithm. The versions differed in the parameters used for user modeling.

• First, was an attempt to shadow the legacy algorithm by guessing the best parameters for modeling, without discriminating individual user and problem differences.
• The second version, did not discriminate users/problems as well. However, the parameters were obtained by fitting the global user parameter and a global problem parameter signature and then using them in model.
• The third version of the parametrized algorithm worked with a set of user specific parameters and problem specific parameter signatures for the modeling.

Contacts

Michael V. Yudelson