It is useful to be able to evaluate objectively the progress of learning in order to realize effective learning systems fitted to individual capabilities. Such systems decrease the load of learning and increase the effectiveness of learning. In this paper, we select "Event Related Potentials" as physical indexes to represent the progress of learning. The progress of learning is measured by the response time which takes for the test subjects to answer properly the given problem. Several variables of Event Related Potentials are defined as candidates for the indexes. The suitable variables are picked up as effective indexes by the results of "Multiple Regression Analysis". Through these results of discussions, this paper will clarify that the deep relationships between these indexes and the progress of learning.
