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10.2.4 Computer-Based Education: On-Line Module
There is a variety of terms used to describe the use of computers in educa-
tion [ 26 ]. Computer-assisted instruction (CAI), computer-based education (CBE)
and computer-based instruction (CBI) are the broadest terms and can refer to virtually
any kind of computer use in educational environments. These terms may refer either
to stand-alone computer learning activities or to computer activities which reinforce
material introduced and taught by teachers.
Most of the software developed in DM and evolutionary computation domain
is designed for research purposes (libraries, algorithms, specific applications, etc.).
But there is some free software that is designed not only for research but also for
educational purposes. These systems are easy to use due to the fact that they provide a
GUI to assist user interaction with the system in all the tasks (selecting data, choosing
parameters, running algorithms, visualize the results, etc.). Some examples of open
source DM systems are Weka [ 2 ], Yale [ 27 ] and Tanagra [ 28 ].
This module is a GUI that allows the user to design an experiment (with one or
more algorithms), run it and visualize the results on-line. The idea is to use this part
of KEEL as a guideline to demonstrate the learning process of a certain model. This
module has a similar structure to the previous one but only includes algorithms and
options that are suitable for academic purposes.
When an experiment is designed the user can choose either to save the experiment
in a XML file or to run it. If the user chooses to run it, then the system will show an
auxiliary window to manage and visualize the execution of each algorithm. When
the run finishes, this window will show the results obtained for each algorithm in
separate tags, showing for example the confusion matrices for classification or the
mean square errors for regression problems (see Fig. 10.4 ).
Fig. 10.4 Auxiliary window of an experiment with two algorithms
 
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