Physics – Physics Education
Scientific paper
2010-05-05
Physics
Physics Education
12 pages, 2 figures, 2 tables
Scientific paper
Item response times of elementary school pupils at a large-scale unspeeded low-stakes test are analyzed in this paper. The results are interpreted in the terms of pace, an alternative measure of student item response time based on the survival function. We have demonstrated the existence of a significant difference between the pace of boys and girls as well as difference between the pace for correct and incorrect answers in this test. Using "rolling-section" design of the test variants, we have measured the warm-up effect. The results show that responses given by the girls exhibit much greater warm-up effect and that occurrence appears to be the most important source of the difference in the pace between these two subgroups. We also demonstrate that the coefficient of variation of total response time ultimately tends to the value predicted by the constant pace assumption. Finally, we propose and evaluate empirical cumulative distribution function as an alternative to assumed cumulative distribution functions for the calculation of the pace.
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