The article proposes an approach to assessing the quality of test bases used for testing students, based on dimensionless criteria. These criteria reflect the time spent by the student on the answer and are presented in dimensionless form, allow to ensure the comparability of the test base scores under different testing conditions. As a result of the end-to-end assessment of dimensionless response times, a frequency diagram is constructed, according to which sets of responses with low, medium and high times are formed. A multitude of answers with a low time and the correct result determines the number and nomenclature of insufficiently complex questions in the test base. A lot of answers with a long time and an erroneous result determines the number and nomenclature of unnecessarily complex questions in the test base. The use of the proposed assessments makes it possible to purposefully update the test base with the indication of the numbers of the questions to be changed, the direction of the changes and the priority.
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